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octospacc 2024-08-31 00:22:11 +02:00
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@ -0,0 +1,21 @@
MIT License
Copyright (c) 2020 Nathan Rajlich
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

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# @tootallnate/once
### Creates a Promise that waits for a single event
## Installation
Install with `npm`:
```bash
$ npm install @tootallnate/once
```
## API
### once(emitter: EventEmitter, name: string, opts?: OnceOptions): Promise&lt;[...Args]&gt;
Creates a Promise that waits for event `name` to occur on `emitter`, and resolves
the promise with an array of the values provided to the event handler. If an
`error` event occurs before the event specified by `name`, then the Promise is
rejected with the error argument.
```typescript
import once from '@tootallnate/once';
import { EventEmitter } from 'events';
const emitter = new EventEmitter();
setTimeout(() => {
emitter.emit('foo', 'bar');
}, 100);
const [result] = await once(emitter, 'foo');
console.log({ result });
// { result: 'bar' }
```
#### Promise Strong Typing
The main feature that this module provides over other "once" implementations is that
the Promise that is returned is _**strongly typed**_ based on the type of `emitter`
and the `name` of the event. Some examples are shown below.
_The process "exit" event contains a single number for exit code:_
```typescript
const [code] = await once(process, 'exit');
// ^ number
```
_A child process "exit" event contains either an exit code or a signal:_
```typescript
const child = spawn('echo', []);
const [code, signal] = await once(child, 'exit');
// ^ number | null
// ^ string | null
```
_A forked child process "message" event is type `any`, so you can cast the Promise directly:_
```typescript
const child = fork('file.js');
// With `await`
const [message, _]: [WorkerPayload, unknown] = await once(child, 'message');
// With Promise
const messagePromise: Promise<[WorkerPayload, unknown]> = once(child, 'message');
// Better yet would be to leave it as `any`, and validate the payload
// at runtime with i.e. `ajv` + `json-schema-to-typescript`
```
_If the TypeScript definition does not contain an overload for the specified event name, then the Promise will have type `unknown[]` and your code will need to narrow the result manually:_
```typescript
interface CustomEmitter extends EventEmitter {
on(name: 'foo', listener: (a: string, b: number) => void): this;
}
const emitter: CustomEmitter = new EventEmitter();
// "foo" event is a defined overload, so it's properly typed
const fooPromise = once(emitter, 'foo');
// ^ Promise<[a: string, b: number]>
// "bar" event in not a defined overload, so it gets `unknown[]`
const barPromise = once(emitter, 'bar');
// ^ Promise<unknown[]>
```
### OnceOptions
- `signal` - `AbortSignal` instance to unbind event handlers before the Promise has been fulfilled.

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/// <reference types="node" />
import { EventEmitter } from 'events';
import { EventNames, EventListenerParameters, AbortSignal } from './types';
export interface OnceOptions {
signal?: AbortSignal;
}
export default function once<Emitter extends EventEmitter, Event extends EventNames<Emitter>>(emitter: Emitter, name: Event, { signal }?: OnceOptions): Promise<EventListenerParameters<Emitter, Event>>;

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"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
function once(emitter, name, { signal } = {}) {
return new Promise((resolve, reject) => {
function cleanup() {
signal === null || signal === void 0 ? void 0 : signal.removeEventListener('abort', cleanup);
emitter.removeListener(name, onEvent);
emitter.removeListener('error', onError);
}
function onEvent(...args) {
cleanup();
resolve(args);
}
function onError(err) {
cleanup();
reject(err);
}
signal === null || signal === void 0 ? void 0 : signal.addEventListener('abort', cleanup);
emitter.on(name, onEvent);
emitter.on('error', onError);
});
}
exports.default = once;
//# sourceMappingURL=index.js.map

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export declare type OverloadedParameters<T> = T extends {
(...args: infer A1): any;
(...args: infer A2): any;
(...args: infer A3): any;
(...args: infer A4): any;
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(...args: infer A18): any;
(...args: infer A19): any;
(...args: infer A20): any;
} ? A1 | A2 | A3 | A4 | A5 | A6 | A7 | A8 | A9 | A10 | A11 | A12 | A13 | A14 | A15 | A16 | A17 | A18 | A19 | A20 : T extends {
(...args: infer A1): any;
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(...args: infer A17): any;
(...args: infer A18): any;
(...args: infer A19): any;
} ? A1 | A2 | A3 | A4 | A5 | A6 | A7 | A8 | A9 | A10 | A11 | A12 | A13 | A14 | A15 | A16 | A17 | A18 | A19 : T extends {
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(...args: infer A18): any;
} ? A1 | A2 | A3 | A4 | A5 | A6 | A7 | A8 | A9 | A10 | A11 | A12 | A13 | A14 | A15 | A16 | A17 | A18 : T extends {
(...args: infer A1): any;
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} ? A1 | A2 | A3 | A4 | A5 | A6 | A7 | A8 | A9 | A10 | A11 | A12 | A13 | A14 | A15 | A16 | A17 : T extends {
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} ? A1 | A2 | A3 | A4 | A5 | A6 | A7 | A8 | A9 | A10 | A11 | A12 | A13 | A14 | A15 | A16 : T extends {
(...args: infer A1): any;
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} ? A1 | A2 | A3 | A4 | A5 | A6 | A7 | A8 | A9 | A10 | A11 | A12 | A13 | A14 | A15 : T extends {
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} ? A1 | A2 | A3 | A4 | A5 | A6 | A7 | A8 | A9 | A10 | A11 | A12 | A13 : T extends {
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} ? A1 | A2 | A3 | A4 | A5 | A6 | A7 : T extends {
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(...args: infer A6): any;
} ? A1 | A2 | A3 | A4 | A5 | A6 : T extends {
(...args: infer A1): any;
(...args: infer A2): any;
(...args: infer A3): any;
(...args: infer A4): any;
(...args: infer A5): any;
} ? A1 | A2 | A3 | A4 | A5 : T extends {
(...args: infer A1): any;
(...args: infer A2): any;
(...args: infer A3): any;
(...args: infer A4): any;
} ? A1 | A2 | A3 | A4 : T extends {
(...args: infer A1): any;
(...args: infer A2): any;
(...args: infer A3): any;
} ? A1 | A2 | A3 : T extends {
(...args: infer A1): any;
(...args: infer A2): any;
} ? A1 | A2 : T extends {
(...args: infer A1): any;
} ? A1 : any;

3
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@ -0,0 +1,3 @@
"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
//# sourceMappingURL=overloaded-parameters.js.map

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@ -0,0 +1 @@
{"version":3,"file":"overloaded-parameters.js","sourceRoot":"","sources":["../src/overloaded-parameters.ts"],"names":[],"mappings":""}

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/// <reference types="node" />
import { EventEmitter } from 'events';
import { OverloadedParameters } from './overloaded-parameters';
export declare type FirstParameter<T> = T extends [infer R, ...any[]] ? R : never;
export declare type EventListener<F, T extends string | symbol> = F extends [
T,
infer R,
...any[]
] ? R : never;
export declare type EventParameters<Emitter extends EventEmitter> = OverloadedParameters<Emitter['on']>;
export declare type EventNames<Emitter extends EventEmitter> = FirstParameter<EventParameters<Emitter>>;
export declare type EventListenerParameters<Emitter extends EventEmitter, Event extends EventNames<Emitter>> = WithDefault<Parameters<EventListener<EventParameters<Emitter>, Event>>, unknown[]>;
export declare type WithDefault<T, D> = [T] extends [never] ? D : T;
export interface AbortSignal {
addEventListener: (name: string, listener: (...args: any[]) => any) => void;
removeEventListener: (name: string, listener: (...args: any[]) => any) => void;
}

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@ -0,0 +1,3 @@
"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
//# sourceMappingURL=types.js.map

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{"version":3,"file":"types.js","sourceRoot":"","sources":["../src/types.ts"],"names":[],"mappings":""}

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{
"name": "@tootallnate/once",
"version": "2.0.0",
"description": "Creates a Promise that waits for a single event",
"main": "./dist/index.js",
"types": "./dist/index.d.ts",
"files": [
"dist"
],
"scripts": {
"prebuild": "rimraf dist",
"build": "tsc",
"test": "jest",
"prepublishOnly": "npm run build"
},
"repository": {
"type": "git",
"url": "git://github.com/TooTallNate/once.git"
},
"keywords": [],
"author": "Nathan Rajlich <nathan@tootallnate.net> (http://n8.io/)",
"license": "MIT",
"bugs": {
"url": "https://github.com/TooTallNate/once/issues"
},
"devDependencies": {
"@types/jest": "^27.0.2",
"@types/node": "^12.12.11",
"abort-controller": "^3.0.0",
"jest": "^27.2.1",
"rimraf": "^3.0.0",
"ts-jest": "^27.0.5",
"typescript": "^4.4.3"
},
"engines": {
"node": ">= 10"
},
"jest": {
"preset": "ts-jest",
"globals": {
"ts-jest": {
"diagnostics": false,
"isolatedModules": true
}
},
"verbose": false,
"testEnvironment": "node",
"testMatch": [
"<rootDir>/test/**/*.test.ts"
]
}
}

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Copyright © 2019 W3C and Jeff Carpenter \<jeffcarp@chromium.org\>
Both the original source code and new contributions in this repository are released under the [3-Clause BSD license](https://opensource.org/licenses/BSD-3-Clause).
# The 3-Clause BSD License
Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
3. Neither the name of the copyright holder nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

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# abab [![npm version](https://badge.fury.io/js/abab.svg)](https://www.npmjs.com/package/abab) [![Build Status](https://travis-ci.org/jsdom/abab.svg?branch=master)](https://travis-ci.org/jsdom/abab)
A JavaScript module that implements `window.atob` and `window.btoa` according the forgiving-base64 algorithm in the [Infra Standard](https://infra.spec.whatwg.org/#forgiving-base64). The original code was forked from [w3c/web-platform-tests](https://github.com/w3c/web-platform-tests/blob/master/html/webappapis/atob/base64.html).
Compatibility: Node.js version 3+ and all major browsers.
Install with `npm`:
```sh
npm install abab
```
## API
### `btoa` (base64 encode)
```js
const { btoa } = require('abab');
btoa('Hello, world!'); // 'SGVsbG8sIHdvcmxkIQ=='
```
### `atob` (base64 decode)
```js
const { atob } = require('abab');
atob('SGVsbG8sIHdvcmxkIQ=='); // 'Hello, world!'
```
#### Valid characters
[Per the spec](https://html.spec.whatwg.org/multipage/webappapis.html#atob:dom-windowbase64-btoa-3), `btoa` will accept strings "containing only characters in the range `U+0000` to `U+00FF`." If passed a string with characters above `U+00FF`, `btoa` will return `null`. If `atob` is passed a string that is not base64-valid, it will also return `null`. In both cases when `null` is returned, the spec calls for throwing a `DOMException` of type `InvalidCharacterError`.
## Browsers
If you want to include just one of the methods to save bytes in your client-side code, you can `require` the desired module directly.
```js
const atob = require('abab/lib/atob');
const btoa = require('abab/lib/btoa');
```
## Development
If you're **submitting a PR** or **deploying to npm**, please use the [checklists in CONTRIBUTING.md](CONTRIBUTING.md#checklists).
## Remembering what `atob` and `btoa` stand for
Base64 comes from IETF [RFC 4648](https://tools.ietf.org/html/rfc4648#section-4) (2006).
- **`btoa`**, the encoder function, stands for **binary** to **ASCII**, meaning it converts any binary input into a subset of **ASCII** (Base64).
- **`atob`**, the decoder function, converts **ASCII** (or Base64) to its original **binary** format.

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export function atob(encodedData: string): string | null
export function btoa(stringToEncode: string): string | null

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"use strict";
const atob = require("./lib/atob");
const btoa = require("./lib/btoa");
module.exports = {
atob,
btoa
};

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"use strict";
/**
* Implementation of atob() according to the HTML and Infra specs, except that
* instead of throwing INVALID_CHARACTER_ERR we return null.
*/
function atob(data) {
if (arguments.length === 0) {
throw new TypeError("1 argument required, but only 0 present.");
}
// Web IDL requires DOMStrings to just be converted using ECMAScript
// ToString, which in our case amounts to using a template literal.
data = `${data}`;
// "Remove all ASCII whitespace from data."
data = data.replace(/[ \t\n\f\r]/g, "");
// "If data's length divides by 4 leaving no remainder, then: if data ends
// with one or two U+003D (=) code points, then remove them from data."
if (data.length % 4 === 0) {
data = data.replace(/==?$/, "");
}
// "If data's length divides by 4 leaving a remainder of 1, then return
// failure."
//
// "If data contains a code point that is not one of
//
// U+002B (+)
// U+002F (/)
// ASCII alphanumeric
//
// then return failure."
if (data.length % 4 === 1 || /[^+/0-9A-Za-z]/.test(data)) {
return null;
}
// "Let output be an empty byte sequence."
let output = "";
// "Let buffer be an empty buffer that can have bits appended to it."
//
// We append bits via left-shift and or. accumulatedBits is used to track
// when we've gotten to 24 bits.
let buffer = 0;
let accumulatedBits = 0;
// "Let position be a position variable for data, initially pointing at the
// start of data."
//
// "While position does not point past the end of data:"
for (let i = 0; i < data.length; i++) {
// "Find the code point pointed to by position in the second column of
// Table 1: The Base 64 Alphabet of RFC 4648. Let n be the number given in
// the first cell of the same row.
//
// "Append to buffer the six bits corresponding to n, most significant bit
// first."
//
// atobLookup() implements the table from RFC 4648.
buffer <<= 6;
buffer |= atobLookup(data[i]);
accumulatedBits += 6;
// "If buffer has accumulated 24 bits, interpret them as three 8-bit
// big-endian numbers. Append three bytes with values equal to those
// numbers to output, in the same order, and then empty buffer."
if (accumulatedBits === 24) {
output += String.fromCharCode((buffer & 0xff0000) >> 16);
output += String.fromCharCode((buffer & 0xff00) >> 8);
output += String.fromCharCode(buffer & 0xff);
buffer = accumulatedBits = 0;
}
// "Advance position by 1."
}
// "If buffer is not empty, it contains either 12 or 18 bits. If it contains
// 12 bits, then discard the last four and interpret the remaining eight as
// an 8-bit big-endian number. If it contains 18 bits, then discard the last
// two and interpret the remaining 16 as two 8-bit big-endian numbers. Append
// the one or two bytes with values equal to those one or two numbers to
// output, in the same order."
if (accumulatedBits === 12) {
buffer >>= 4;
output += String.fromCharCode(buffer);
} else if (accumulatedBits === 18) {
buffer >>= 2;
output += String.fromCharCode((buffer & 0xff00) >> 8);
output += String.fromCharCode(buffer & 0xff);
}
// "Return output."
return output;
}
/**
* A lookup table for atob(), which converts an ASCII character to the
* corresponding six-bit number.
*/
const keystr =
"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
function atobLookup(chr) {
const index = keystr.indexOf(chr);
// Throw exception if character is not in the lookup string; should not be hit in tests
return index < 0 ? undefined : index;
}
module.exports = atob;

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"use strict";
/**
* btoa() as defined by the HTML and Infra specs, which mostly just references
* RFC 4648.
*/
function btoa(s) {
if (arguments.length === 0) {
throw new TypeError("1 argument required, but only 0 present.");
}
let i;
// String conversion as required by Web IDL.
s = `${s}`;
// "The btoa() method must throw an "InvalidCharacterError" DOMException if
// data contains any character whose code point is greater than U+00FF."
for (i = 0; i < s.length; i++) {
if (s.charCodeAt(i) > 255) {
return null;
}
}
let out = "";
for (i = 0; i < s.length; i += 3) {
const groupsOfSix = [undefined, undefined, undefined, undefined];
groupsOfSix[0] = s.charCodeAt(i) >> 2;
groupsOfSix[1] = (s.charCodeAt(i) & 0x03) << 4;
if (s.length > i + 1) {
groupsOfSix[1] |= s.charCodeAt(i + 1) >> 4;
groupsOfSix[2] = (s.charCodeAt(i + 1) & 0x0f) << 2;
}
if (s.length > i + 2) {
groupsOfSix[2] |= s.charCodeAt(i + 2) >> 6;
groupsOfSix[3] = s.charCodeAt(i + 2) & 0x3f;
}
for (let j = 0; j < groupsOfSix.length; j++) {
if (typeof groupsOfSix[j] === "undefined") {
out += "=";
} else {
out += btoaLookup(groupsOfSix[j]);
}
}
}
return out;
}
/**
* Lookup table for btoa(), which converts a six-bit number into the
* corresponding ASCII character.
*/
const keystr =
"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
function btoaLookup(index) {
if (index >= 0 && index < 64) {
return keystr[index];
}
// Throw INVALID_CHARACTER_ERR exception here -- won't be hit in the tests.
return undefined;
}
module.exports = btoa;

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{
"name": "abab",
"version": "2.0.6",
"description": "WHATWG spec-compliant implementations of window.atob and window.btoa.",
"main": "index.js",
"files": [
"index.d.ts",
"index.js",
"lib/"
],
"scripts": {
"mocha": "mocha test/node",
"karma": "karma start",
"test": "npm run lint && npm run mocha && npm run karma",
"lint": "eslint ."
},
"repository": {
"type": "git",
"url": "git+https://github.com/jsdom/abab.git"
},
"keywords": [
"atob",
"btoa",
"browser"
],
"author": "Jeff Carpenter <gcarpenterv@gmail.com>",
"license": "BSD-3-Clause",
"bugs": {
"url": "https://github.com/jsdom/abab/issues"
},
"homepage": "https://github.com/jsdom/abab#readme",
"devDependencies": {
"eslint": "^4.19.1",
"karma": "^2.0.0",
"karma-cli": "^1.0.1",
"karma-firefox-launcher": "^1.1.0",
"karma-mocha": "^1.3.0",
"karma-webpack": "^3.0.0",
"mocha": "^5.1.0",
"webpack": "^4.5.0"
}
}

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Copyright (c) 2014 Forbes Lindesay
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.

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# acorn-globals
Detect global variables in JavaScript using acorn
[Get supported acorn-globals with the Tidelift Subscription](https://tidelift.com/subscription/pkg/npm-acorn_globals?utm_source=npm-acorn-globals&utm_medium=referral&utm_campaign=readme)
[![Build Status](https://img.shields.io/github/workflow/status/ForbesLindesay/acorn-globals/Publish%20Canary/master?style=for-the-badge)](https://github.com/ForbesLindesay/acorn-globals/actions?query=workflow%3APublish%20Canary+branch%3Amaster)
[![Rolling Versions](https://img.shields.io/badge/Rolling%20Versions-Enabled-brightgreen?style=for-the-badge)](https://rollingversions.com/ForbesLindesay/acorn-globals)
[![NPM version](https://img.shields.io/npm/v/acorn-globals?style=for-the-badge)](https://www.npmjs.com/package/acorn-globals)
## Installation
npm install acorn-globals
## Usage
detect.js
```js
var fs = require('fs');
var detect = require('acorn-globals');
var src = fs.readFileSync(__dirname + '/input.js', 'utf8');
var scope = detect(src);
console.dir(scope);
```
input.js
```js
var x = 5;
var y = 3, z = 2;
w.foo();
w = 2;
RAWR=444;
RAWR.foo();
BLARG=3;
foo(function () {
var BAR = 3;
process.nextTick(function (ZZZZZZZZZZZZ) {
console.log('beep boop');
var xyz = 4;
x += 10;
x.zzzzzz;
ZZZ=6;
});
function doom () {
}
ZZZ.foo();
});
console.log(xyz);
```
output:
```
$ node example/detect.js
[ { name: 'BLARG', nodes: [ [Object] ] },
{ name: 'RAWR', nodes: [ [Object], [Object] ] },
{ name: 'ZZZ', nodes: [ [Object], [Object] ] },
{ name: 'console', nodes: [ [Object], [Object] ] },
{ name: 'foo', nodes: [ [Object] ] },
{ name: 'process', nodes: [ [Object] ] },
{ name: 'w', nodes: [ [Object], [Object] ] },
{ name: 'xyz', nodes: [ [Object] ] } ]
```
## Security contact information
To report a security vulnerability, please use the [Tidelift security contact](https://tidelift.com/security). Tidelift will coordinate the fix and disclosure.
## License
MIT

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'use strict';
var acorn = require('acorn');
var walk = require('acorn-walk');
function isScope(node) {
return node.type === 'FunctionExpression' || node.type === 'FunctionDeclaration' || node.type === 'ArrowFunctionExpression' || node.type === 'Program';
}
function isBlockScope(node) {
// The body of switch statement is a block.
return node.type === 'BlockStatement' || node.type === 'SwitchStatement' || isScope(node);
}
function declaresArguments(node) {
return node.type === 'FunctionExpression' || node.type === 'FunctionDeclaration';
}
function reallyParse(source, options) {
var parseOptions = Object.assign(
{
allowReturnOutsideFunction: true,
allowImportExportEverywhere: true,
allowHashBang: true,
ecmaVersion: "latest"
},
options
);
return acorn.parse(source, parseOptions);
}
module.exports = findGlobals;
module.exports.parse = reallyParse;
function findGlobals(source, options) {
options = options || {};
var globals = [];
var ast;
// istanbul ignore else
if (typeof source === 'string') {
ast = reallyParse(source, options);
} else {
ast = source;
}
// istanbul ignore if
if (!(ast && typeof ast === 'object' && ast.type === 'Program')) {
throw new TypeError('Source must be either a string of JavaScript or an acorn AST');
}
var declareFunction = function (node) {
var fn = node;
fn.locals = fn.locals || Object.create(null);
node.params.forEach(function (node) {
declarePattern(node, fn);
});
if (node.id) {
fn.locals[node.id.name] = true;
}
};
var declareClass = function (node) {
node.locals = node.locals || Object.create(null);
if (node.id) {
node.locals[node.id.name] = true;
}
};
var declarePattern = function (node, parent) {
switch (node.type) {
case 'Identifier':
parent.locals[node.name] = true;
break;
case 'ObjectPattern':
node.properties.forEach(function (node) {
declarePattern(node.value || node.argument, parent);
});
break;
case 'ArrayPattern':
node.elements.forEach(function (node) {
if (node) declarePattern(node, parent);
});
break;
case 'RestElement':
declarePattern(node.argument, parent);
break;
case 'AssignmentPattern':
declarePattern(node.left, parent);
break;
// istanbul ignore next
default:
throw new Error('Unrecognized pattern type: ' + node.type);
}
};
var declareModuleSpecifier = function (node, parents) {
ast.locals = ast.locals || Object.create(null);
ast.locals[node.local.name] = true;
};
walk.ancestor(ast, {
'VariableDeclaration': function (node, parents) {
var parent = null;
for (var i = parents.length - 1; i >= 0 && parent === null; i--) {
if (node.kind === 'var' ? isScope(parents[i]) : isBlockScope(parents[i])) {
parent = parents[i];
}
}
parent.locals = parent.locals || Object.create(null);
node.declarations.forEach(function (declaration) {
declarePattern(declaration.id, parent);
});
},
'FunctionDeclaration': function (node, parents) {
var parent = null;
for (var i = parents.length - 2; i >= 0 && parent === null; i--) {
if (isScope(parents[i])) {
parent = parents[i];
}
}
parent.locals = parent.locals || Object.create(null);
if (node.id) {
parent.locals[node.id.name] = true;
}
declareFunction(node);
},
'Function': declareFunction,
'ClassDeclaration': function (node, parents) {
var parent = null;
for (var i = parents.length - 2; i >= 0 && parent === null; i--) {
if (isBlockScope(parents[i])) {
parent = parents[i];
}
}
parent.locals = parent.locals || Object.create(null);
if (node.id) {
parent.locals[node.id.name] = true;
}
declareClass(node);
},
'Class': declareClass,
'TryStatement': function (node) {
if (node.handler === null || node.handler.param === null) return;
node.handler.locals = node.handler.locals || Object.create(null);
declarePattern(node.handler.param, node.handler);
},
'ImportDefaultSpecifier': declareModuleSpecifier,
'ImportSpecifier': declareModuleSpecifier,
'ImportNamespaceSpecifier': declareModuleSpecifier
});
function identifier(node, parents) {
var name = node.name;
if (name === 'undefined') return;
for (var i = 0; i < parents.length; i++) {
if (name === 'arguments' && declaresArguments(parents[i])) {
return;
}
if (parents[i].locals && name in parents[i].locals) {
return;
}
}
node.parents = parents.slice();
globals.push(node);
}
walk.ancestor(ast, {
'VariablePattern': identifier,
'Identifier': identifier,
'ThisExpression': function (node, parents) {
for (var i = 0; i < parents.length; i++) {
var parent = parents[i];
if ( parent.type === 'FunctionExpression' || parent.type === 'FunctionDeclaration' ) { return; }
if ( parent.type === 'PropertyDefinition' && parents[i+1]===parent.value ) { return; }
}
node.parents = parents.slice();
globals.push(node);
}
});
var groupedGlobals = Object.create(null);
globals.forEach(function (node) {
var name = node.type === 'ThisExpression' ? 'this' : node.name;
groupedGlobals[name] = (groupedGlobals[name] || []);
groupedGlobals[name].push(node);
});
return Object.keys(groupedGlobals).sort().map(function (name) {
return {name: name, nodes: groupedGlobals[name]};
});
}

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{
"name": "acorn-globals",
"version": "7.0.1",
"description": "Detect global variables in JavaScript using acorn",
"keywords": [
"ast",
"variable",
"name",
"lexical",
"scope",
"local",
"global",
"implicit"
],
"files": [
"index.js",
"LICENSE"
],
"dependencies": {
"acorn": "^8.1.0",
"acorn-walk": "^8.0.2"
},
"devDependencies": {
"testit": "^3.1.0"
},
"scripts": {
"test": "node test"
},
"repository": {
"type": "git",
"url": "https://github.com/ForbesLindesay/acorn-globals.git"
},
"author": "ForbesLindesay",
"license": "MIT"
}

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## 8.2.0 (2021-09-06)
### New features
Add support for walking ES2022 class static blocks.
## 8.1.1 (2021-06-29)
### Bug fixes
Include `base` in the type declarations.
## 8.1.0 (2021-04-24)
### New features
Support node types for class fields and private methods.
## 8.0.2 (2021-01-25)
### Bug fixes
Adjust package.json to work with Node 12.16.0 and 13.0-13.6.
## 8.0.0 (2021-01-05)
### Bug fixes
Fix a bug where `full` and `fullAncestor` would skip nodes with overridden types.
## 8.0.0 (2020-08-12)
### New features
The package can now be loaded directly as an ECMAScript module in node 13+.
## 7.2.0 (2020-06-17)
### New features
Support optional chaining and nullish coalescing.
Support `import.meta`.
Add support for `export * as ns from "source"`.
## 7.1.1 (2020-02-13)
### Bug fixes
Clean up the type definitions to actually work well with the main parser.
## 7.1.0 (2020-02-11)
### New features
Add a TypeScript definition file for the library.
## 7.0.0 (2017-08-12)
### New features
Support walking `ImportExpression` nodes.
## 6.2.0 (2017-07-04)
### New features
Add support for `Import` nodes.
## 6.1.0 (2018-09-28)
### New features
The walker now walks `TemplateElement` nodes.
## 6.0.1 (2018-09-14)
### Bug fixes
Fix bad "main" field in package.json.
## 6.0.0 (2018-09-14)
### Breaking changes
This is now a separate package, `acorn-walk`, rather than part of the main `acorn` package.
The `ScopeBody` and `ScopeExpression` meta-node-types are no longer supported.
## 5.7.1 (2018-06-15)
### Bug fixes
Make sure the walker and bin files are rebuilt on release (the previous release didn't get the up-to-date versions).
## 5.7.0 (2018-06-15)
### Bug fixes
Fix crash in walker when walking a binding-less catch node.
## 5.6.2 (2018-06-05)
### Bug fixes
In the walker, go back to allowing the `baseVisitor` argument to be null to default to the default base everywhere.
## 5.6.1 (2018-06-01)
### Bug fixes
Fix regression when passing `null` as fourth argument to `walk.recursive`.
## 5.6.0 (2018-05-31)
### Bug fixes
Fix a bug in the walker that caused a crash when walking an object pattern spread.
## 5.5.1 (2018-03-06)
### Bug fixes
Fix regression in walker causing property values in object patterns to be walked as expressions.
## 5.5.0 (2018-02-27)
### Bug fixes
Support object spread in the AST walker.
## 5.4.1 (2018-02-02)
### Bug fixes
5.4.0 somehow accidentally included an old version of walk.js.
## 5.2.0 (2017-10-30)
### Bug fixes
The `full` and `fullAncestor` walkers no longer visit nodes multiple times.
## 5.1.0 (2017-07-05)
### New features
New walker functions `full` and `fullAncestor`.
## 3.2.0 (2016-06-07)
### New features
Make it possible to use `visit.ancestor` with a walk state.
## 3.1.0 (2016-04-18)
### New features
The walker now allows defining handlers for `CatchClause` nodes.
## 2.5.2 (2015-10-27)
### Fixes
Fix bug where the walker walked an exported `let` statement as an expression.

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MIT License
Copyright (C) 2012-2020 by various contributors (see AUTHORS)
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.

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# Acorn AST walker
An abstract syntax tree walker for the
[ESTree](https://github.com/estree/estree) format.
## Community
Acorn is open source software released under an
[MIT license](https://github.com/acornjs/acorn/blob/master/acorn-walk/LICENSE).
You are welcome to
[report bugs](https://github.com/acornjs/acorn/issues) or create pull
requests on [github](https://github.com/acornjs/acorn). For questions
and discussion, please use the
[Tern discussion forum](https://discuss.ternjs.net).
## Installation
The easiest way to install acorn is from [`npm`](https://www.npmjs.com/):
```sh
npm install acorn-walk
```
Alternately, you can download the source and build acorn yourself:
```sh
git clone https://github.com/acornjs/acorn.git
cd acorn
npm install
```
## Interface
An algorithm for recursing through a syntax tree is stored as an
object, with a property for each tree node type holding a function
that will recurse through such a node. There are several ways to run
such a walker.
**simple**`(node, visitors, base, state)` does a 'simple' walk over a
tree. `node` should be the AST node to walk, and `visitors` an object
with properties whose names correspond to node types in the [ESTree
spec](https://github.com/estree/estree). The properties should contain
functions that will be called with the node object and, if applicable
the state at that point. The last two arguments are optional. `base`
is a walker algorithm, and `state` is a start state. The default
walker will simply visit all statements and expressions and not
produce a meaningful state. (An example of a use of state is to track
scope at each point in the tree.)
```js
const acorn = require("acorn")
const walk = require("acorn-walk")
walk.simple(acorn.parse("let x = 10"), {
Literal(node) {
console.log(`Found a literal: ${node.value}`)
}
})
```
**ancestor**`(node, visitors, base, state)` does a 'simple' walk over
a tree, building up an array of ancestor nodes (including the current node)
and passing the array to the callbacks as a third parameter.
```js
const acorn = require("acorn")
const walk = require("acorn-walk")
walk.ancestor(acorn.parse("foo('hi')"), {
Literal(_, ancestors) {
console.log("This literal's ancestors are:", ancestors.map(n => n.type))
}
})
```
**recursive**`(node, state, functions, base)` does a 'recursive'
walk, where the walker functions are responsible for continuing the
walk on the child nodes of their target node. `state` is the start
state, and `functions` should contain an object that maps node types
to walker functions. Such functions are called with `(node, state, c)`
arguments, and can cause the walk to continue on a sub-node by calling
the `c` argument on it with `(node, state)` arguments. The optional
`base` argument provides the fallback walker functions for node types
that aren't handled in the `functions` object. If not given, the
default walkers will be used.
**make**`(functions, base)` builds a new walker object by using the
walker functions in `functions` and filling in the missing ones by
taking defaults from `base`.
**full**`(node, callback, base, state)` does a 'full' walk over a
tree, calling the callback with the arguments (node, state, type) for
each node
**fullAncestor**`(node, callback, base, state)` does a 'full' walk
over a tree, building up an array of ancestor nodes (including the
current node) and passing the array to the callbacks as a third
parameter.
```js
const acorn = require("acorn")
const walk = require("acorn-walk")
walk.full(acorn.parse("1 + 1"), node => {
console.log(`There's a ${node.type} node at ${node.ch}`)
})
```
**findNodeAt**`(node, start, end, test, base, state)` tries to locate
a node in a tree at the given start and/or end offsets, which
satisfies the predicate `test`. `start` and `end` can be either `null`
(as wildcard) or a number. `test` may be a string (indicating a node
type) or a function that takes `(nodeType, node)` arguments and
returns a boolean indicating whether this node is interesting. `base`
and `state` are optional, and can be used to specify a custom walker.
Nodes are tested from inner to outer, so if two nodes match the
boundaries, the inner one will be preferred.
**findNodeAround**`(node, pos, test, base, state)` is a lot like
`findNodeAt`, but will match any node that exists 'around' (spanning)
the given position.
**findNodeAfter**`(node, pos, test, base, state)` is similar to
`findNodeAround`, but will match all nodes *after* the given position
(testing outer nodes before inner nodes).

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import {Node} from 'acorn';
declare module "acorn-walk" {
type FullWalkerCallback<TState> = (
node: Node,
state: TState,
type: string
) => void;
type FullAncestorWalkerCallback<TState> = (
node: Node,
state: TState | Node[],
ancestors: Node[],
type: string
) => void;
type WalkerCallback<TState> = (node: Node, state: TState) => void;
type SimpleWalkerFn<TState> = (
node: Node,
state: TState
) => void;
type AncestorWalkerFn<TState> = (
node: Node,
state: TState| Node[],
ancestors: Node[]
) => void;
type RecursiveWalkerFn<TState> = (
node: Node,
state: TState,
callback: WalkerCallback<TState>
) => void;
type SimpleVisitors<TState> = {
[type: string]: SimpleWalkerFn<TState>
};
type AncestorVisitors<TState> = {
[type: string]: AncestorWalkerFn<TState>
};
type RecursiveVisitors<TState> = {
[type: string]: RecursiveWalkerFn<TState>
};
type FindPredicate = (type: string, node: Node) => boolean;
interface Found<TState> {
node: Node,
state: TState
}
export function simple<TState>(
node: Node,
visitors: SimpleVisitors<TState>,
base?: RecursiveVisitors<TState>,
state?: TState
): void;
export function ancestor<TState>(
node: Node,
visitors: AncestorVisitors<TState>,
base?: RecursiveVisitors<TState>,
state?: TState
): void;
export function recursive<TState>(
node: Node,
state: TState,
functions: RecursiveVisitors<TState>,
base?: RecursiveVisitors<TState>
): void;
export function full<TState>(
node: Node,
callback: FullWalkerCallback<TState>,
base?: RecursiveVisitors<TState>,
state?: TState
): void;
export function fullAncestor<TState>(
node: Node,
callback: FullAncestorWalkerCallback<TState>,
base?: RecursiveVisitors<TState>,
state?: TState
): void;
export function make<TState>(
functions: RecursiveVisitors<TState>,
base?: RecursiveVisitors<TState>
): RecursiveVisitors<TState>;
export function findNodeAt<TState>(
node: Node,
start: number | undefined,
end?: number | undefined,
type?: FindPredicate | string,
base?: RecursiveVisitors<TState>,
state?: TState
): Found<TState> | undefined;
export function findNodeAround<TState>(
node: Node,
start: number | undefined,
type?: FindPredicate | string,
base?: RecursiveVisitors<TState>,
state?: TState
): Found<TState> | undefined;
export const findNodeAfter: typeof findNodeAround;
export const base: RecursiveVisitors<any>;
}

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(function (global, factory) {
typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :
typeof define === 'function' && define.amd ? define(['exports'], factory) :
(global = global || self, factory((global.acorn = global.acorn || {}, global.acorn.walk = {})));
}(this, (function (exports) { 'use strict';
// AST walker module for Mozilla Parser API compatible trees
// A simple walk is one where you simply specify callbacks to be
// called on specific nodes. The last two arguments are optional. A
// simple use would be
//
// walk.simple(myTree, {
// Expression: function(node) { ... }
// });
//
// to do something with all expressions. All Parser API node types
// can be used to identify node types, as well as Expression and
// Statement, which denote categories of nodes.
//
// The base argument can be used to pass a custom (recursive)
// walker, and state can be used to give this walked an initial
// state.
function simple(node, visitors, baseVisitor, state, override) {
if (!baseVisitor) { baseVisitor = base
; }(function c(node, st, override) {
var type = override || node.type, found = visitors[type];
baseVisitor[type](node, st, c);
if (found) { found(node, st); }
})(node, state, override);
}
// An ancestor walk keeps an array of ancestor nodes (including the
// current node) and passes them to the callback as third parameter
// (and also as state parameter when no other state is present).
function ancestor(node, visitors, baseVisitor, state, override) {
var ancestors = [];
if (!baseVisitor) { baseVisitor = base
; }(function c(node, st, override) {
var type = override || node.type, found = visitors[type];
var isNew = node !== ancestors[ancestors.length - 1];
if (isNew) { ancestors.push(node); }
baseVisitor[type](node, st, c);
if (found) { found(node, st || ancestors, ancestors); }
if (isNew) { ancestors.pop(); }
})(node, state, override);
}
// A recursive walk is one where your functions override the default
// walkers. They can modify and replace the state parameter that's
// threaded through the walk, and can opt how and whether to walk
// their child nodes (by calling their third argument on these
// nodes).
function recursive(node, state, funcs, baseVisitor, override) {
var visitor = funcs ? make(funcs, baseVisitor || undefined) : baseVisitor
;(function c(node, st, override) {
visitor[override || node.type](node, st, c);
})(node, state, override);
}
function makeTest(test) {
if (typeof test === "string")
{ return function (type) { return type === test; } }
else if (!test)
{ return function () { return true; } }
else
{ return test }
}
var Found = function Found(node, state) { this.node = node; this.state = state; };
// A full walk triggers the callback on each node
function full(node, callback, baseVisitor, state, override) {
if (!baseVisitor) { baseVisitor = base; }
var last
;(function c(node, st, override) {
var type = override || node.type;
baseVisitor[type](node, st, c);
if (last !== node) {
callback(node, st, type);
last = node;
}
})(node, state, override);
}
// An fullAncestor walk is like an ancestor walk, but triggers
// the callback on each node
function fullAncestor(node, callback, baseVisitor, state) {
if (!baseVisitor) { baseVisitor = base; }
var ancestors = [], last
;(function c(node, st, override) {
var type = override || node.type;
var isNew = node !== ancestors[ancestors.length - 1];
if (isNew) { ancestors.push(node); }
baseVisitor[type](node, st, c);
if (last !== node) {
callback(node, st || ancestors, ancestors, type);
last = node;
}
if (isNew) { ancestors.pop(); }
})(node, state);
}
// Find a node with a given start, end, and type (all are optional,
// null can be used as wildcard). Returns a {node, state} object, or
// undefined when it doesn't find a matching node.
function findNodeAt(node, start, end, test, baseVisitor, state) {
if (!baseVisitor) { baseVisitor = base; }
test = makeTest(test);
try {
(function c(node, st, override) {
var type = override || node.type;
if ((start == null || node.start <= start) &&
(end == null || node.end >= end))
{ baseVisitor[type](node, st, c); }
if ((start == null || node.start === start) &&
(end == null || node.end === end) &&
test(type, node))
{ throw new Found(node, st) }
})(node, state);
} catch (e) {
if (e instanceof Found) { return e }
throw e
}
}
// Find the innermost node of a given type that contains the given
// position. Interface similar to findNodeAt.
function findNodeAround(node, pos, test, baseVisitor, state) {
test = makeTest(test);
if (!baseVisitor) { baseVisitor = base; }
try {
(function c(node, st, override) {
var type = override || node.type;
if (node.start > pos || node.end < pos) { return }
baseVisitor[type](node, st, c);
if (test(type, node)) { throw new Found(node, st) }
})(node, state);
} catch (e) {
if (e instanceof Found) { return e }
throw e
}
}
// Find the outermost matching node after a given position.
function findNodeAfter(node, pos, test, baseVisitor, state) {
test = makeTest(test);
if (!baseVisitor) { baseVisitor = base; }
try {
(function c(node, st, override) {
if (node.end < pos) { return }
var type = override || node.type;
if (node.start >= pos && test(type, node)) { throw new Found(node, st) }
baseVisitor[type](node, st, c);
})(node, state);
} catch (e) {
if (e instanceof Found) { return e }
throw e
}
}
// Find the outermost matching node before a given position.
function findNodeBefore(node, pos, test, baseVisitor, state) {
test = makeTest(test);
if (!baseVisitor) { baseVisitor = base; }
var max
;(function c(node, st, override) {
if (node.start > pos) { return }
var type = override || node.type;
if (node.end <= pos && (!max || max.node.end < node.end) && test(type, node))
{ max = new Found(node, st); }
baseVisitor[type](node, st, c);
})(node, state);
return max
}
// Used to create a custom walker. Will fill in all missing node
// type properties with the defaults.
function make(funcs, baseVisitor) {
var visitor = Object.create(baseVisitor || base);
for (var type in funcs) { visitor[type] = funcs[type]; }
return visitor
}
function skipThrough(node, st, c) { c(node, st); }
function ignore(_node, _st, _c) {}
// Node walkers.
var base = {};
base.Program = base.BlockStatement = base.StaticBlock = function (node, st, c) {
for (var i = 0, list = node.body; i < list.length; i += 1)
{
var stmt = list[i];
c(stmt, st, "Statement");
}
};
base.Statement = skipThrough;
base.EmptyStatement = ignore;
base.ExpressionStatement = base.ParenthesizedExpression = base.ChainExpression =
function (node, st, c) { return c(node.expression, st, "Expression"); };
base.IfStatement = function (node, st, c) {
c(node.test, st, "Expression");
c(node.consequent, st, "Statement");
if (node.alternate) { c(node.alternate, st, "Statement"); }
};
base.LabeledStatement = function (node, st, c) { return c(node.body, st, "Statement"); };
base.BreakStatement = base.ContinueStatement = ignore;
base.WithStatement = function (node, st, c) {
c(node.object, st, "Expression");
c(node.body, st, "Statement");
};
base.SwitchStatement = function (node, st, c) {
c(node.discriminant, st, "Expression");
for (var i$1 = 0, list$1 = node.cases; i$1 < list$1.length; i$1 += 1) {
var cs = list$1[i$1];
if (cs.test) { c(cs.test, st, "Expression"); }
for (var i = 0, list = cs.consequent; i < list.length; i += 1)
{
var cons = list[i];
c(cons, st, "Statement");
}
}
};
base.SwitchCase = function (node, st, c) {
if (node.test) { c(node.test, st, "Expression"); }
for (var i = 0, list = node.consequent; i < list.length; i += 1)
{
var cons = list[i];
c(cons, st, "Statement");
}
};
base.ReturnStatement = base.YieldExpression = base.AwaitExpression = function (node, st, c) {
if (node.argument) { c(node.argument, st, "Expression"); }
};
base.ThrowStatement = base.SpreadElement =
function (node, st, c) { return c(node.argument, st, "Expression"); };
base.TryStatement = function (node, st, c) {
c(node.block, st, "Statement");
if (node.handler) { c(node.handler, st); }
if (node.finalizer) { c(node.finalizer, st, "Statement"); }
};
base.CatchClause = function (node, st, c) {
if (node.param) { c(node.param, st, "Pattern"); }
c(node.body, st, "Statement");
};
base.WhileStatement = base.DoWhileStatement = function (node, st, c) {
c(node.test, st, "Expression");
c(node.body, st, "Statement");
};
base.ForStatement = function (node, st, c) {
if (node.init) { c(node.init, st, "ForInit"); }
if (node.test) { c(node.test, st, "Expression"); }
if (node.update) { c(node.update, st, "Expression"); }
c(node.body, st, "Statement");
};
base.ForInStatement = base.ForOfStatement = function (node, st, c) {
c(node.left, st, "ForInit");
c(node.right, st, "Expression");
c(node.body, st, "Statement");
};
base.ForInit = function (node, st, c) {
if (node.type === "VariableDeclaration") { c(node, st); }
else { c(node, st, "Expression"); }
};
base.DebuggerStatement = ignore;
base.FunctionDeclaration = function (node, st, c) { return c(node, st, "Function"); };
base.VariableDeclaration = function (node, st, c) {
for (var i = 0, list = node.declarations; i < list.length; i += 1)
{
var decl = list[i];
c(decl, st);
}
};
base.VariableDeclarator = function (node, st, c) {
c(node.id, st, "Pattern");
if (node.init) { c(node.init, st, "Expression"); }
};
base.Function = function (node, st, c) {
if (node.id) { c(node.id, st, "Pattern"); }
for (var i = 0, list = node.params; i < list.length; i += 1)
{
var param = list[i];
c(param, st, "Pattern");
}
c(node.body, st, node.expression ? "Expression" : "Statement");
};
base.Pattern = function (node, st, c) {
if (node.type === "Identifier")
{ c(node, st, "VariablePattern"); }
else if (node.type === "MemberExpression")
{ c(node, st, "MemberPattern"); }
else
{ c(node, st); }
};
base.VariablePattern = ignore;
base.MemberPattern = skipThrough;
base.RestElement = function (node, st, c) { return c(node.argument, st, "Pattern"); };
base.ArrayPattern = function (node, st, c) {
for (var i = 0, list = node.elements; i < list.length; i += 1) {
var elt = list[i];
if (elt) { c(elt, st, "Pattern"); }
}
};
base.ObjectPattern = function (node, st, c) {
for (var i = 0, list = node.properties; i < list.length; i += 1) {
var prop = list[i];
if (prop.type === "Property") {
if (prop.computed) { c(prop.key, st, "Expression"); }
c(prop.value, st, "Pattern");
} else if (prop.type === "RestElement") {
c(prop.argument, st, "Pattern");
}
}
};
base.Expression = skipThrough;
base.ThisExpression = base.Super = base.MetaProperty = ignore;
base.ArrayExpression = function (node, st, c) {
for (var i = 0, list = node.elements; i < list.length; i += 1) {
var elt = list[i];
if (elt) { c(elt, st, "Expression"); }
}
};
base.ObjectExpression = function (node, st, c) {
for (var i = 0, list = node.properties; i < list.length; i += 1)
{
var prop = list[i];
c(prop, st);
}
};
base.FunctionExpression = base.ArrowFunctionExpression = base.FunctionDeclaration;
base.SequenceExpression = function (node, st, c) {
for (var i = 0, list = node.expressions; i < list.length; i += 1)
{
var expr = list[i];
c(expr, st, "Expression");
}
};
base.TemplateLiteral = function (node, st, c) {
for (var i = 0, list = node.quasis; i < list.length; i += 1)
{
var quasi = list[i];
c(quasi, st);
}
for (var i$1 = 0, list$1 = node.expressions; i$1 < list$1.length; i$1 += 1)
{
var expr = list$1[i$1];
c(expr, st, "Expression");
}
};
base.TemplateElement = ignore;
base.UnaryExpression = base.UpdateExpression = function (node, st, c) {
c(node.argument, st, "Expression");
};
base.BinaryExpression = base.LogicalExpression = function (node, st, c) {
c(node.left, st, "Expression");
c(node.right, st, "Expression");
};
base.AssignmentExpression = base.AssignmentPattern = function (node, st, c) {
c(node.left, st, "Pattern");
c(node.right, st, "Expression");
};
base.ConditionalExpression = function (node, st, c) {
c(node.test, st, "Expression");
c(node.consequent, st, "Expression");
c(node.alternate, st, "Expression");
};
base.NewExpression = base.CallExpression = function (node, st, c) {
c(node.callee, st, "Expression");
if (node.arguments)
{ for (var i = 0, list = node.arguments; i < list.length; i += 1)
{
var arg = list[i];
c(arg, st, "Expression");
} }
};
base.MemberExpression = function (node, st, c) {
c(node.object, st, "Expression");
if (node.computed) { c(node.property, st, "Expression"); }
};
base.ExportNamedDeclaration = base.ExportDefaultDeclaration = function (node, st, c) {
if (node.declaration)
{ c(node.declaration, st, node.type === "ExportNamedDeclaration" || node.declaration.id ? "Statement" : "Expression"); }
if (node.source) { c(node.source, st, "Expression"); }
};
base.ExportAllDeclaration = function (node, st, c) {
if (node.exported)
{ c(node.exported, st); }
c(node.source, st, "Expression");
};
base.ImportDeclaration = function (node, st, c) {
for (var i = 0, list = node.specifiers; i < list.length; i += 1)
{
var spec = list[i];
c(spec, st);
}
c(node.source, st, "Expression");
};
base.ImportExpression = function (node, st, c) {
c(node.source, st, "Expression");
};
base.ImportSpecifier = base.ImportDefaultSpecifier = base.ImportNamespaceSpecifier = base.Identifier = base.PrivateIdentifier = base.Literal = ignore;
base.TaggedTemplateExpression = function (node, st, c) {
c(node.tag, st, "Expression");
c(node.quasi, st, "Expression");
};
base.ClassDeclaration = base.ClassExpression = function (node, st, c) { return c(node, st, "Class"); };
base.Class = function (node, st, c) {
if (node.id) { c(node.id, st, "Pattern"); }
if (node.superClass) { c(node.superClass, st, "Expression"); }
c(node.body, st);
};
base.ClassBody = function (node, st, c) {
for (var i = 0, list = node.body; i < list.length; i += 1)
{
var elt = list[i];
c(elt, st);
}
};
base.MethodDefinition = base.PropertyDefinition = base.Property = function (node, st, c) {
if (node.computed) { c(node.key, st, "Expression"); }
if (node.value) { c(node.value, st, "Expression"); }
};
exports.ancestor = ancestor;
exports.base = base;
exports.findNodeAfter = findNodeAfter;
exports.findNodeAround = findNodeAround;
exports.findNodeAt = findNodeAt;
exports.findNodeBefore = findNodeBefore;
exports.full = full;
exports.fullAncestor = fullAncestor;
exports.make = make;
exports.recursive = recursive;
exports.simple = simple;
Object.defineProperty(exports, '__esModule', { value: true });
})));

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// AST walker module for Mozilla Parser API compatible trees
// A simple walk is one where you simply specify callbacks to be
// called on specific nodes. The last two arguments are optional. A
// simple use would be
//
// walk.simple(myTree, {
// Expression: function(node) { ... }
// });
//
// to do something with all expressions. All Parser API node types
// can be used to identify node types, as well as Expression and
// Statement, which denote categories of nodes.
//
// The base argument can be used to pass a custom (recursive)
// walker, and state can be used to give this walked an initial
// state.
function simple(node, visitors, baseVisitor, state, override) {
if (!baseVisitor) { baseVisitor = base
; }(function c(node, st, override) {
var type = override || node.type, found = visitors[type];
baseVisitor[type](node, st, c);
if (found) { found(node, st); }
})(node, state, override);
}
// An ancestor walk keeps an array of ancestor nodes (including the
// current node) and passes them to the callback as third parameter
// (and also as state parameter when no other state is present).
function ancestor(node, visitors, baseVisitor, state, override) {
var ancestors = [];
if (!baseVisitor) { baseVisitor = base
; }(function c(node, st, override) {
var type = override || node.type, found = visitors[type];
var isNew = node !== ancestors[ancestors.length - 1];
if (isNew) { ancestors.push(node); }
baseVisitor[type](node, st, c);
if (found) { found(node, st || ancestors, ancestors); }
if (isNew) { ancestors.pop(); }
})(node, state, override);
}
// A recursive walk is one where your functions override the default
// walkers. They can modify and replace the state parameter that's
// threaded through the walk, and can opt how and whether to walk
// their child nodes (by calling their third argument on these
// nodes).
function recursive(node, state, funcs, baseVisitor, override) {
var visitor = funcs ? make(funcs, baseVisitor || undefined) : baseVisitor
;(function c(node, st, override) {
visitor[override || node.type](node, st, c);
})(node, state, override);
}
function makeTest(test) {
if (typeof test === "string")
{ return function (type) { return type === test; } }
else if (!test)
{ return function () { return true; } }
else
{ return test }
}
var Found = function Found(node, state) { this.node = node; this.state = state; };
// A full walk triggers the callback on each node
function full(node, callback, baseVisitor, state, override) {
if (!baseVisitor) { baseVisitor = base; }
var last
;(function c(node, st, override) {
var type = override || node.type;
baseVisitor[type](node, st, c);
if (last !== node) {
callback(node, st, type);
last = node;
}
})(node, state, override);
}
// An fullAncestor walk is like an ancestor walk, but triggers
// the callback on each node
function fullAncestor(node, callback, baseVisitor, state) {
if (!baseVisitor) { baseVisitor = base; }
var ancestors = [], last
;(function c(node, st, override) {
var type = override || node.type;
var isNew = node !== ancestors[ancestors.length - 1];
if (isNew) { ancestors.push(node); }
baseVisitor[type](node, st, c);
if (last !== node) {
callback(node, st || ancestors, ancestors, type);
last = node;
}
if (isNew) { ancestors.pop(); }
})(node, state);
}
// Find a node with a given start, end, and type (all are optional,
// null can be used as wildcard). Returns a {node, state} object, or
// undefined when it doesn't find a matching node.
function findNodeAt(node, start, end, test, baseVisitor, state) {
if (!baseVisitor) { baseVisitor = base; }
test = makeTest(test);
try {
(function c(node, st, override) {
var type = override || node.type;
if ((start == null || node.start <= start) &&
(end == null || node.end >= end))
{ baseVisitor[type](node, st, c); }
if ((start == null || node.start === start) &&
(end == null || node.end === end) &&
test(type, node))
{ throw new Found(node, st) }
})(node, state);
} catch (e) {
if (e instanceof Found) { return e }
throw e
}
}
// Find the innermost node of a given type that contains the given
// position. Interface similar to findNodeAt.
function findNodeAround(node, pos, test, baseVisitor, state) {
test = makeTest(test);
if (!baseVisitor) { baseVisitor = base; }
try {
(function c(node, st, override) {
var type = override || node.type;
if (node.start > pos || node.end < pos) { return }
baseVisitor[type](node, st, c);
if (test(type, node)) { throw new Found(node, st) }
})(node, state);
} catch (e) {
if (e instanceof Found) { return e }
throw e
}
}
// Find the outermost matching node after a given position.
function findNodeAfter(node, pos, test, baseVisitor, state) {
test = makeTest(test);
if (!baseVisitor) { baseVisitor = base; }
try {
(function c(node, st, override) {
if (node.end < pos) { return }
var type = override || node.type;
if (node.start >= pos && test(type, node)) { throw new Found(node, st) }
baseVisitor[type](node, st, c);
})(node, state);
} catch (e) {
if (e instanceof Found) { return e }
throw e
}
}
// Find the outermost matching node before a given position.
function findNodeBefore(node, pos, test, baseVisitor, state) {
test = makeTest(test);
if (!baseVisitor) { baseVisitor = base; }
var max
;(function c(node, st, override) {
if (node.start > pos) { return }
var type = override || node.type;
if (node.end <= pos && (!max || max.node.end < node.end) && test(type, node))
{ max = new Found(node, st); }
baseVisitor[type](node, st, c);
})(node, state);
return max
}
// Used to create a custom walker. Will fill in all missing node
// type properties with the defaults.
function make(funcs, baseVisitor) {
var visitor = Object.create(baseVisitor || base);
for (var type in funcs) { visitor[type] = funcs[type]; }
return visitor
}
function skipThrough(node, st, c) { c(node, st); }
function ignore(_node, _st, _c) {}
// Node walkers.
var base = {};
base.Program = base.BlockStatement = base.StaticBlock = function (node, st, c) {
for (var i = 0, list = node.body; i < list.length; i += 1)
{
var stmt = list[i];
c(stmt, st, "Statement");
}
};
base.Statement = skipThrough;
base.EmptyStatement = ignore;
base.ExpressionStatement = base.ParenthesizedExpression = base.ChainExpression =
function (node, st, c) { return c(node.expression, st, "Expression"); };
base.IfStatement = function (node, st, c) {
c(node.test, st, "Expression");
c(node.consequent, st, "Statement");
if (node.alternate) { c(node.alternate, st, "Statement"); }
};
base.LabeledStatement = function (node, st, c) { return c(node.body, st, "Statement"); };
base.BreakStatement = base.ContinueStatement = ignore;
base.WithStatement = function (node, st, c) {
c(node.object, st, "Expression");
c(node.body, st, "Statement");
};
base.SwitchStatement = function (node, st, c) {
c(node.discriminant, st, "Expression");
for (var i$1 = 0, list$1 = node.cases; i$1 < list$1.length; i$1 += 1) {
var cs = list$1[i$1];
if (cs.test) { c(cs.test, st, "Expression"); }
for (var i = 0, list = cs.consequent; i < list.length; i += 1)
{
var cons = list[i];
c(cons, st, "Statement");
}
}
};
base.SwitchCase = function (node, st, c) {
if (node.test) { c(node.test, st, "Expression"); }
for (var i = 0, list = node.consequent; i < list.length; i += 1)
{
var cons = list[i];
c(cons, st, "Statement");
}
};
base.ReturnStatement = base.YieldExpression = base.AwaitExpression = function (node, st, c) {
if (node.argument) { c(node.argument, st, "Expression"); }
};
base.ThrowStatement = base.SpreadElement =
function (node, st, c) { return c(node.argument, st, "Expression"); };
base.TryStatement = function (node, st, c) {
c(node.block, st, "Statement");
if (node.handler) { c(node.handler, st); }
if (node.finalizer) { c(node.finalizer, st, "Statement"); }
};
base.CatchClause = function (node, st, c) {
if (node.param) { c(node.param, st, "Pattern"); }
c(node.body, st, "Statement");
};
base.WhileStatement = base.DoWhileStatement = function (node, st, c) {
c(node.test, st, "Expression");
c(node.body, st, "Statement");
};
base.ForStatement = function (node, st, c) {
if (node.init) { c(node.init, st, "ForInit"); }
if (node.test) { c(node.test, st, "Expression"); }
if (node.update) { c(node.update, st, "Expression"); }
c(node.body, st, "Statement");
};
base.ForInStatement = base.ForOfStatement = function (node, st, c) {
c(node.left, st, "ForInit");
c(node.right, st, "Expression");
c(node.body, st, "Statement");
};
base.ForInit = function (node, st, c) {
if (node.type === "VariableDeclaration") { c(node, st); }
else { c(node, st, "Expression"); }
};
base.DebuggerStatement = ignore;
base.FunctionDeclaration = function (node, st, c) { return c(node, st, "Function"); };
base.VariableDeclaration = function (node, st, c) {
for (var i = 0, list = node.declarations; i < list.length; i += 1)
{
var decl = list[i];
c(decl, st);
}
};
base.VariableDeclarator = function (node, st, c) {
c(node.id, st, "Pattern");
if (node.init) { c(node.init, st, "Expression"); }
};
base.Function = function (node, st, c) {
if (node.id) { c(node.id, st, "Pattern"); }
for (var i = 0, list = node.params; i < list.length; i += 1)
{
var param = list[i];
c(param, st, "Pattern");
}
c(node.body, st, node.expression ? "Expression" : "Statement");
};
base.Pattern = function (node, st, c) {
if (node.type === "Identifier")
{ c(node, st, "VariablePattern"); }
else if (node.type === "MemberExpression")
{ c(node, st, "MemberPattern"); }
else
{ c(node, st); }
};
base.VariablePattern = ignore;
base.MemberPattern = skipThrough;
base.RestElement = function (node, st, c) { return c(node.argument, st, "Pattern"); };
base.ArrayPattern = function (node, st, c) {
for (var i = 0, list = node.elements; i < list.length; i += 1) {
var elt = list[i];
if (elt) { c(elt, st, "Pattern"); }
}
};
base.ObjectPattern = function (node, st, c) {
for (var i = 0, list = node.properties; i < list.length; i += 1) {
var prop = list[i];
if (prop.type === "Property") {
if (prop.computed) { c(prop.key, st, "Expression"); }
c(prop.value, st, "Pattern");
} else if (prop.type === "RestElement") {
c(prop.argument, st, "Pattern");
}
}
};
base.Expression = skipThrough;
base.ThisExpression = base.Super = base.MetaProperty = ignore;
base.ArrayExpression = function (node, st, c) {
for (var i = 0, list = node.elements; i < list.length; i += 1) {
var elt = list[i];
if (elt) { c(elt, st, "Expression"); }
}
};
base.ObjectExpression = function (node, st, c) {
for (var i = 0, list = node.properties; i < list.length; i += 1)
{
var prop = list[i];
c(prop, st);
}
};
base.FunctionExpression = base.ArrowFunctionExpression = base.FunctionDeclaration;
base.SequenceExpression = function (node, st, c) {
for (var i = 0, list = node.expressions; i < list.length; i += 1)
{
var expr = list[i];
c(expr, st, "Expression");
}
};
base.TemplateLiteral = function (node, st, c) {
for (var i = 0, list = node.quasis; i < list.length; i += 1)
{
var quasi = list[i];
c(quasi, st);
}
for (var i$1 = 0, list$1 = node.expressions; i$1 < list$1.length; i$1 += 1)
{
var expr = list$1[i$1];
c(expr, st, "Expression");
}
};
base.TemplateElement = ignore;
base.UnaryExpression = base.UpdateExpression = function (node, st, c) {
c(node.argument, st, "Expression");
};
base.BinaryExpression = base.LogicalExpression = function (node, st, c) {
c(node.left, st, "Expression");
c(node.right, st, "Expression");
};
base.AssignmentExpression = base.AssignmentPattern = function (node, st, c) {
c(node.left, st, "Pattern");
c(node.right, st, "Expression");
};
base.ConditionalExpression = function (node, st, c) {
c(node.test, st, "Expression");
c(node.consequent, st, "Expression");
c(node.alternate, st, "Expression");
};
base.NewExpression = base.CallExpression = function (node, st, c) {
c(node.callee, st, "Expression");
if (node.arguments)
{ for (var i = 0, list = node.arguments; i < list.length; i += 1)
{
var arg = list[i];
c(arg, st, "Expression");
} }
};
base.MemberExpression = function (node, st, c) {
c(node.object, st, "Expression");
if (node.computed) { c(node.property, st, "Expression"); }
};
base.ExportNamedDeclaration = base.ExportDefaultDeclaration = function (node, st, c) {
if (node.declaration)
{ c(node.declaration, st, node.type === "ExportNamedDeclaration" || node.declaration.id ? "Statement" : "Expression"); }
if (node.source) { c(node.source, st, "Expression"); }
};
base.ExportAllDeclaration = function (node, st, c) {
if (node.exported)
{ c(node.exported, st); }
c(node.source, st, "Expression");
};
base.ImportDeclaration = function (node, st, c) {
for (var i = 0, list = node.specifiers; i < list.length; i += 1)
{
var spec = list[i];
c(spec, st);
}
c(node.source, st, "Expression");
};
base.ImportExpression = function (node, st, c) {
c(node.source, st, "Expression");
};
base.ImportSpecifier = base.ImportDefaultSpecifier = base.ImportNamespaceSpecifier = base.Identifier = base.PrivateIdentifier = base.Literal = ignore;
base.TaggedTemplateExpression = function (node, st, c) {
c(node.tag, st, "Expression");
c(node.quasi, st, "Expression");
};
base.ClassDeclaration = base.ClassExpression = function (node, st, c) { return c(node, st, "Class"); };
base.Class = function (node, st, c) {
if (node.id) { c(node.id, st, "Pattern"); }
if (node.superClass) { c(node.superClass, st, "Expression"); }
c(node.body, st);
};
base.ClassBody = function (node, st, c) {
for (var i = 0, list = node.body; i < list.length; i += 1)
{
var elt = list[i];
c(elt, st);
}
};
base.MethodDefinition = base.PropertyDefinition = base.Property = function (node, st, c) {
if (node.computed) { c(node.key, st, "Expression"); }
if (node.value) { c(node.value, st, "Expression"); }
};
export { ancestor, base, findNodeAfter, findNodeAround, findNodeAt, findNodeBefore, full, fullAncestor, make, recursive, simple };

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{
"name": "acorn-walk",
"description": "ECMAScript (ESTree) AST walker",
"homepage": "https://github.com/acornjs/acorn",
"main": "dist/walk.js",
"types": "dist/walk.d.ts",
"module": "dist/walk.mjs",
"exports": {
".": [
{
"import": "./dist/walk.mjs",
"require": "./dist/walk.js",
"default": "./dist/walk.js"
},
"./dist/walk.js"
],
"./package.json": "./package.json"
},
"version": "8.2.0",
"engines": {"node": ">=0.4.0"},
"maintainers": [
{
"name": "Marijn Haverbeke",
"email": "marijnh@gmail.com",
"web": "https://marijnhaverbeke.nl"
},
{
"name": "Ingvar Stepanyan",
"email": "me@rreverser.com",
"web": "https://rreverser.com/"
},
{
"name": "Adrian Heine",
"web": "http://adrianheine.de"
}
],
"repository": {
"type": "git",
"url": "https://github.com/acornjs/acorn.git"
},
"scripts": {
"prepare": "cd ..; npm run build:walk"
},
"license": "MIT"
}

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## 8.8.1 (2022-10-24)
### Bug fixes
Make type for `Comment` compatible with estree types.
## 8.8.0 (2022-07-21)
### Bug fixes
Allow parentheses around spread args in destructuring object assignment.
Fix an issue where the tree contained `directive` properties in when parsing with a language version that doesn't support them.
### New features
Support hashbang comments by default in ECMAScript 2023 and later.
## 8.7.1 (2021-04-26)
### Bug fixes
Stop handling `"use strict"` directives in ECMAScript versions before 5.
Fix an issue where duplicate quoted export names in `export *` syntax were incorrectly checked.
Add missing type for `tokTypes`.
## 8.7.0 (2021-12-27)
### New features
Support quoted export names.
Upgrade to Unicode 14.
Add support for Unicode 13 properties in regular expressions.
### Bug fixes
Use a loop to find line breaks, because the existing regexp search would overrun the end of the searched range and waste a lot of time in minified code.
## 8.6.0 (2021-11-18)
### Bug fixes
Fix a bug where an object literal with multiple `__proto__` properties would incorrectly be accepted if a later property value held an assigment.
### New features
Support class private fields with the `in` operator.
## 8.5.0 (2021-09-06)
### Bug fixes
Improve context-dependent tokenization in a number of corner cases.
Fix location tracking after a 0x2028 or 0x2029 character in a string literal (which before did not increase the line number).
Fix an issue where arrow function bodies in for loop context would inappropriately consume `in` operators.
Fix wrong end locations stored on SequenceExpression nodes.
Implement restriction that `for`/`of` loop LHS can't start with `let`.
### New features
Add support for ES2022 class static blocks.
Allow multiple input files to be passed to the CLI tool.
## 8.4.1 (2021-06-24)
### Bug fixes
Fix a bug where `allowAwaitOutsideFunction` would allow `await` in class field initializers, and setting `ecmaVersion` to 13 or higher would allow top-level await in non-module sources.
## 8.4.0 (2021-06-11)
### New features
A new option, `allowSuperOutsideMethod`, can be used to suppress the error when `super` is used in the wrong context.
## 8.3.0 (2021-05-31)
### New features
Default `allowAwaitOutsideFunction` to true for ECMAScript 2022 an higher.
Add support for the `d` ([indices](https://github.com/tc39/proposal-regexp-match-indices)) regexp flag.
## 8.2.4 (2021-05-04)
### Bug fixes
Fix spec conformity in corner case 'for await (async of ...)'.
## 8.2.3 (2021-05-04)
### Bug fixes
Fix an issue where the library couldn't parse 'for (async of ...)'.
Fix a bug in UTF-16 decoding that would read characters incorrectly in some circumstances.
## 8.2.2 (2021-04-29)
### Bug fixes
Fix a bug where a class field initialized to an async arrow function wouldn't allow await inside it. Same issue existed for generator arrow functions with yield.
## 8.2.1 (2021-04-24)
### Bug fixes
Fix a regression introduced in 8.2.0 where static or async class methods with keyword names fail to parse.
## 8.2.0 (2021-04-24)
### New features
Add support for ES2022 class fields and private methods.
## 8.1.1 (2021-04-12)
### Various
Stop shipping source maps in the NPM package.
## 8.1.0 (2021-03-09)
### Bug fixes
Fix a spurious error in nested destructuring arrays.
### New features
Expose `allowAwaitOutsideFunction` in CLI interface.
Make `allowImportExportAnywhere` also apply to `import.meta`.
## 8.0.5 (2021-01-25)
### Bug fixes
Adjust package.json to work with Node 12.16.0 and 13.0-13.6.
## 8.0.4 (2020-10-05)
### Bug fixes
Make `await x ** y` an error, following the spec.
Fix potentially exponential regular expression.
## 8.0.3 (2020-10-02)
### Bug fixes
Fix a wasteful loop during `Parser` creation when setting `ecmaVersion` to `"latest"`.
## 8.0.2 (2020-09-30)
### Bug fixes
Make the TypeScript types reflect the current allowed values for `ecmaVersion`.
Fix another regexp/division tokenizer issue.
## 8.0.1 (2020-08-12)
### Bug fixes
Provide the correct value in the `version` export.
## 8.0.0 (2020-08-12)
### Bug fixes
Disallow expressions like `(a = b) = c`.
Make non-octal escape sequences a syntax error in strict mode.
### New features
The package can now be loaded directly as an ECMAScript module in node 13+.
Update to the set of Unicode properties from ES2021.
### Breaking changes
The `ecmaVersion` option is now required. For the moment, omitting it will still work with a warning, but that will change in a future release.
Some changes to method signatures that may be used by plugins.
## 7.4.0 (2020-08-03)
### New features
Add support for logical assignment operators.
Add support for numeric separators.
## 7.3.1 (2020-06-11)
### Bug fixes
Make the string in the `version` export match the actual library version.
## 7.3.0 (2020-06-11)
### Bug fixes
Fix a bug that caused parsing of object patterns with a property named `set` that had a default value to fail.
### New features
Add support for optional chaining (`?.`).
## 7.2.0 (2020-05-09)
### Bug fixes
Fix precedence issue in parsing of async arrow functions.
### New features
Add support for nullish coalescing.
Add support for `import.meta`.
Support `export * as ...` syntax.
Upgrade to Unicode 13.
## 6.4.1 (2020-03-09)
### Bug fixes
More carefully check for valid UTF16 surrogate pairs in regexp validator.
## 7.1.1 (2020-03-01)
### Bug fixes
Treat `\8` and `\9` as invalid escapes in template strings.
Allow unicode escapes in property names that are keywords.
Don't error on an exponential operator expression as argument to `await`.
More carefully check for valid UTF16 surrogate pairs in regexp validator.
## 7.1.0 (2019-09-24)
### Bug fixes
Disallow trailing object literal commas when ecmaVersion is less than 5.
### New features
Add a static `acorn` property to the `Parser` class that contains the entire module interface, to allow plugins to access the instance of the library that they are acting on.
## 7.0.0 (2019-08-13)
### Breaking changes
Changes the node format for dynamic imports to use the `ImportExpression` node type, as defined in [ESTree](https://github.com/estree/estree/blob/master/es2020.md#importexpression).
Makes 10 (ES2019) the default value for the `ecmaVersion` option.
## 6.3.0 (2019-08-12)
### New features
`sourceType: "module"` can now be used even when `ecmaVersion` is less than 6, to parse module-style code that otherwise conforms to an older standard.
## 6.2.1 (2019-07-21)
### Bug fixes
Fix bug causing Acorn to treat some characters as identifier characters that shouldn't be treated as such.
Fix issue where setting the `allowReserved` option to `"never"` allowed reserved words in some circumstances.
## 6.2.0 (2019-07-04)
### Bug fixes
Improve valid assignment checking in `for`/`in` and `for`/`of` loops.
Disallow binding `let` in patterns.
### New features
Support bigint syntax with `ecmaVersion` >= 11.
Support dynamic `import` syntax with `ecmaVersion` >= 11.
Upgrade to Unicode version 12.
## 6.1.1 (2019-02-27)
### Bug fixes
Fix bug that caused parsing default exports of with names to fail.
## 6.1.0 (2019-02-08)
### Bug fixes
Fix scope checking when redefining a `var` as a lexical binding.
### New features
Split up `parseSubscripts` to use an internal `parseSubscript` method to make it easier to extend with plugins.
## 6.0.7 (2019-02-04)
### Bug fixes
Check that exported bindings are defined.
Don't treat `\u180e` as a whitespace character.
Check for duplicate parameter names in methods.
Don't allow shorthand properties when they are generators or async methods.
Forbid binding `await` in async arrow function's parameter list.
## 6.0.6 (2019-01-30)
### Bug fixes
The content of class declarations and expressions is now always parsed in strict mode.
Don't allow `let` or `const` to bind the variable name `let`.
Treat class declarations as lexical.
Don't allow a generator function declaration as the sole body of an `if` or `else`.
Ignore `"use strict"` when after an empty statement.
Allow string line continuations with special line terminator characters.
Treat `for` bodies as part of the `for` scope when checking for conflicting bindings.
Fix bug with parsing `yield` in a `for` loop initializer.
Implement special cases around scope checking for functions.
## 6.0.5 (2019-01-02)
### Bug fixes
Fix TypeScript type for `Parser.extend` and add `allowAwaitOutsideFunction` to options type.
Don't treat `let` as a keyword when the next token is `{` on the next line.
Fix bug that broke checking for parentheses around an object pattern in a destructuring assignment when `preserveParens` was on.
## 6.0.4 (2018-11-05)
### Bug fixes
Further improvements to tokenizing regular expressions in corner cases.
## 6.0.3 (2018-11-04)
### Bug fixes
Fix bug in tokenizing an expression-less return followed by a function followed by a regular expression.
Remove stray symlink in the package tarball.
## 6.0.2 (2018-09-26)
### Bug fixes
Fix bug where default expressions could fail to parse inside an object destructuring assignment expression.
## 6.0.1 (2018-09-14)
### Bug fixes
Fix wrong value in `version` export.
## 6.0.0 (2018-09-14)
### Bug fixes
Better handle variable-redefinition checks for catch bindings and functions directly under if statements.
Forbid `new.target` in top-level arrow functions.
Fix issue with parsing a regexp after `yield` in some contexts.
### New features
The package now comes with TypeScript definitions.
### Breaking changes
The default value of the `ecmaVersion` option is now 9 (2018).
Plugins work differently, and will have to be rewritten to work with this version.
The loose parser and walker have been moved into separate packages (`acorn-loose` and `acorn-walk`).
## 5.7.3 (2018-09-10)
### Bug fixes
Fix failure to tokenize regexps after expressions like `x.of`.
Better error message for unterminated template literals.
## 5.7.2 (2018-08-24)
### Bug fixes
Properly handle `allowAwaitOutsideFunction` in for statements.
Treat function declarations at the top level of modules like let bindings.
Don't allow async function declarations as the only statement under a label.
## 5.7.0 (2018-06-15)
### New features
Upgraded to Unicode 11.
## 5.6.0 (2018-05-31)
### New features
Allow U+2028 and U+2029 in string when ECMAVersion >= 10.
Allow binding-less catch statements when ECMAVersion >= 10.
Add `allowAwaitOutsideFunction` option for parsing top-level `await`.
## 5.5.3 (2018-03-08)
### Bug fixes
A _second_ republish of the code in 5.5.1, this time with yarn, to hopefully get valid timestamps.
## 5.5.2 (2018-03-08)
### Bug fixes
A republish of the code in 5.5.1 in an attempt to solve an issue with the file timestamps in the npm package being 0.
## 5.5.1 (2018-03-06)
### Bug fixes
Fix misleading error message for octal escapes in template strings.
## 5.5.0 (2018-02-27)
### New features
The identifier character categorization is now based on Unicode version 10.
Acorn will now validate the content of regular expressions, including new ES9 features.
## 5.4.0 (2018-02-01)
### Bug fixes
Disallow duplicate or escaped flags on regular expressions.
Disallow octal escapes in strings in strict mode.
### New features
Add support for async iteration.
Add support for object spread and rest.
## 5.3.0 (2017-12-28)
### Bug fixes
Fix parsing of floating point literals with leading zeroes in loose mode.
Allow duplicate property names in object patterns.
Don't allow static class methods named `prototype`.
Disallow async functions directly under `if` or `else`.
Parse right-hand-side of `for`/`of` as an assignment expression.
Stricter parsing of `for`/`in`.
Don't allow unicode escapes in contextual keywords.
### New features
Parsing class members was factored into smaller methods to allow plugins to hook into it.
## 5.2.1 (2017-10-30)
### Bug fixes
Fix a token context corruption bug.
## 5.2.0 (2017-10-30)
### Bug fixes
Fix token context tracking for `class` and `function` in property-name position.
Make sure `%*` isn't parsed as a valid operator.
Allow shorthand properties `get` and `set` to be followed by default values.
Disallow `super` when not in callee or object position.
### New features
Support [`directive` property](https://github.com/estree/estree/compare/b3de58c9997504d6fba04b72f76e6dd1619ee4eb...1da8e603237144f44710360f8feb7a9977e905e0) on directive expression statements.
## 5.1.2 (2017-09-04)
### Bug fixes
Disable parsing of legacy HTML-style comments in modules.
Fix parsing of async methods whose names are keywords.
## 5.1.1 (2017-07-06)
### Bug fixes
Fix problem with disambiguating regexp and division after a class.
## 5.1.0 (2017-07-05)
### Bug fixes
Fix tokenizing of regexps in an object-desctructuring `for`/`of` loop and after `yield`.
Parse zero-prefixed numbers with non-octal digits as decimal.
Allow object/array patterns in rest parameters.
Don't error when `yield` is used as a property name.
Allow `async` as a shorthand object property.
### New features
Implement the [template literal revision proposal](https://github.com/tc39/proposal-template-literal-revision) for ES9.
## 5.0.3 (2017-04-01)
### Bug fixes
Fix spurious duplicate variable definition errors for named functions.
## 5.0.2 (2017-03-30)
### Bug fixes
A binary operator after a parenthesized arrow expression is no longer incorrectly treated as an error.
## 5.0.0 (2017-03-28)
### Bug fixes
Raise an error for duplicated lexical bindings.
Fix spurious error when an assignement expression occurred after a spread expression.
Accept regular expressions after `of` (in `for`/`of`), `yield` (in a generator), and braced arrow functions.
Allow labels in front or `var` declarations, even in strict mode.
### Breaking changes
Parse declarations following `export default` as declaration nodes, not expressions. This means that class and function declarations nodes can now have `null` as their `id`.
## 4.0.11 (2017-02-07)
### Bug fixes
Allow all forms of member expressions to be parenthesized as lvalue.
## 4.0.10 (2017-02-07)
### Bug fixes
Don't expect semicolons after default-exported functions or classes, even when they are expressions.
Check for use of `'use strict'` directives in non-simple parameter functions, even when already in strict mode.
## 4.0.9 (2017-02-06)
### Bug fixes
Fix incorrect error raised for parenthesized simple assignment targets, so that `(x) = 1` parses again.
## 4.0.8 (2017-02-03)
### Bug fixes
Solve spurious parenthesized pattern errors by temporarily erring on the side of accepting programs that our delayed errors don't handle correctly yet.
## 4.0.7 (2017-02-02)
### Bug fixes
Accept invalidly rejected code like `(x).y = 2` again.
Don't raise an error when a function _inside_ strict code has a non-simple parameter list.
## 4.0.6 (2017-02-02)
### Bug fixes
Fix exponential behavior (manifesting itself as a complete hang for even relatively small source files) introduced by the new 'use strict' check.
## 4.0.5 (2017-02-02)
### Bug fixes
Disallow parenthesized pattern expressions.
Allow keywords as export names.
Don't allow the `async` keyword to be parenthesized.
Properly raise an error when a keyword contains a character escape.
Allow `"use strict"` to appear after other string literal expressions.
Disallow labeled declarations.
## 4.0.4 (2016-12-19)
### Bug fixes
Fix crash when `export` was followed by a keyword that can't be
exported.
## 4.0.3 (2016-08-16)
### Bug fixes
Allow regular function declarations inside single-statement `if` branches in loose mode. Forbid them entirely in strict mode.
Properly parse properties named `async` in ES2017 mode.
Fix bug where reserved words were broken in ES2017 mode.
## 4.0.2 (2016-08-11)
### Bug fixes
Don't ignore period or 'e' characters after octal numbers.
Fix broken parsing for call expressions in default parameter values of arrow functions.
## 4.0.1 (2016-08-08)
### Bug fixes
Fix false positives in duplicated export name errors.
## 4.0.0 (2016-08-07)
### Breaking changes
The default `ecmaVersion` option value is now 7.
A number of internal method signatures changed, so plugins might need to be updated.
### Bug fixes
The parser now raises errors on duplicated export names.
`arguments` and `eval` can now be used in shorthand properties.
Duplicate parameter names in non-simple argument lists now always produce an error.
### New features
The `ecmaVersion` option now also accepts year-style version numbers
(2015, etc).
Support for `async`/`await` syntax when `ecmaVersion` is >= 8.
Support for trailing commas in call expressions when `ecmaVersion` is >= 8.
## 3.3.0 (2016-07-25)
### Bug fixes
Fix bug in tokenizing of regexp operator after a function declaration.
Fix parser crash when parsing an array pattern with a hole.
### New features
Implement check against complex argument lists in functions that enable strict mode in ES7.
## 3.2.0 (2016-06-07)
### Bug fixes
Improve handling of lack of unicode regexp support in host
environment.
Properly reject shorthand properties whose name is a keyword.
### New features
Visitors created with `visit.make` now have their base as _prototype_, rather than copying properties into a fresh object.
## 3.1.0 (2016-04-18)
### Bug fixes
Properly tokenize the division operator directly after a function expression.
Allow trailing comma in destructuring arrays.
## 3.0.4 (2016-02-25)
### Fixes
Allow update expressions as left-hand-side of the ES7 exponential operator.
## 3.0.2 (2016-02-10)
### Fixes
Fix bug that accidentally made `undefined` a reserved word when parsing ES7.
## 3.0.0 (2016-02-10)
### Breaking changes
The default value of the `ecmaVersion` option is now 6 (used to be 5).
Support for comprehension syntax (which was dropped from the draft spec) has been removed.
### Fixes
`let` and `yield` are now “contextual keywords”, meaning you can mostly use them as identifiers in ES5 non-strict code.
A parenthesized class or function expression after `export default` is now parsed correctly.
### New features
When `ecmaVersion` is set to 7, Acorn will parse the exponentiation operator (`**`).
The identifier character ranges are now based on Unicode 8.0.0.
Plugins can now override the `raiseRecoverable` method to override the way non-critical errors are handled.
## 2.7.0 (2016-01-04)
### Fixes
Stop allowing rest parameters in setters.
Disallow `y` rexexp flag in ES5.
Disallow `\00` and `\000` escapes in strict mode.
Raise an error when an import name is a reserved word.
## 2.6.2 (2015-11-10)
### Fixes
Don't crash when no options object is passed.
## 2.6.0 (2015-11-09)
### Fixes
Add `await` as a reserved word in module sources.
Disallow `yield` in a parameter default value for a generator.
Forbid using a comma after a rest pattern in an array destructuring.
### New features
Support parsing stdin in command-line tool.
## 2.5.0 (2015-10-27)
### Fixes
Fix tokenizer support in the command-line tool.
Stop allowing `new.target` outside of functions.
Remove legacy `guard` and `guardedHandler` properties from try nodes.
Stop allowing multiple `__proto__` properties on an object literal in strict mode.
Don't allow rest parameters to be non-identifier patterns.
Check for duplicate paramter names in arrow functions.

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MIT License
Copyright (C) 2012-2022 by various contributors (see AUTHORS)
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.

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# Acorn
A tiny, fast JavaScript parser written in JavaScript.
## Community
Acorn is open source software released under an
[MIT license](https://github.com/acornjs/acorn/blob/master/acorn/LICENSE).
You are welcome to
[report bugs](https://github.com/acornjs/acorn/issues) or create pull
requests on [github](https://github.com/acornjs/acorn). For questions
and discussion, please use the
[Tern discussion forum](https://discuss.ternjs.net).
## Installation
The easiest way to install acorn is from [`npm`](https://www.npmjs.com/):
```sh
npm install acorn
```
Alternately, you can download the source and build acorn yourself:
```sh
git clone https://github.com/acornjs/acorn.git
cd acorn
npm install
```
## Interface
**parse**`(input, options)` is the main interface to the library. The
`input` parameter is a string, `options` must be an object setting
some of the options listed below. The return value will be an abstract
syntax tree object as specified by the [ESTree
spec](https://github.com/estree/estree).
```javascript
let acorn = require("acorn");
console.log(acorn.parse("1 + 1", {ecmaVersion: 2020}));
```
When encountering a syntax error, the parser will raise a
`SyntaxError` object with a meaningful message. The error object will
have a `pos` property that indicates the string offset at which the
error occurred, and a `loc` object that contains a `{line, column}`
object referring to that same position.
Options are provided by in a second argument, which should be an
object containing any of these fields (only `ecmaVersion` is
required):
- **ecmaVersion**: Indicates the ECMAScript version to parse. Must be
either 3, 5, 6 (or 2015), 7 (2016), 8 (2017), 9 (2018), 10 (2019),
11 (2020), 12 (2021), 13 (2022), 14 (2023), or `"latest"` (the
latest the library supports). This influences support for strict
mode, the set of reserved words, and support for new syntax
features.
**NOTE**: Only 'stage 4' (finalized) ECMAScript features are being
implemented by Acorn. Other proposed new features must be
implemented through plugins.
- **sourceType**: Indicate the mode the code should be parsed in. Can be
either `"script"` or `"module"`. This influences global strict mode
and parsing of `import` and `export` declarations.
**NOTE**: If set to `"module"`, then static `import` / `export` syntax
will be valid, even if `ecmaVersion` is less than 6.
- **onInsertedSemicolon**: If given a callback, that callback will be
called whenever a missing semicolon is inserted by the parser. The
callback will be given the character offset of the point where the
semicolon is inserted as argument, and if `locations` is on, also a
`{line, column}` object representing this position.
- **onTrailingComma**: Like `onInsertedSemicolon`, but for trailing
commas.
- **allowReserved**: If `false`, using a reserved word will generate
an error. Defaults to `true` for `ecmaVersion` 3, `false` for higher
versions. When given the value `"never"`, reserved words and
keywords can also not be used as property names (as in Internet
Explorer's old parser).
- **allowReturnOutsideFunction**: By default, a return statement at
the top level raises an error. Set this to `true` to accept such
code.
- **allowImportExportEverywhere**: By default, `import` and `export`
declarations can only appear at a program's top level. Setting this
option to `true` allows them anywhere where a statement is allowed,
and also allows `import.meta` expressions to appear in scripts
(when `sourceType` is not `"module"`).
- **allowAwaitOutsideFunction**: If `false`, `await` expressions can
only appear inside `async` functions. Defaults to `true` for
`ecmaVersion` 2022 and later, `false` for lower versions. Setting this option to
`true` allows to have top-level `await` expressions. They are
still not allowed in non-`async` functions, though.
- **allowSuperOutsideMethod**: By default, `super` outside a method
raises an error. Set this to `true` to accept such code.
- **allowHashBang**: When this is enabled, if the code starts with the
characters `#!` (as in a shellscript), the first line will be
treated as a comment. Defaults to true when `ecmaVersion` >= 2023.
- **locations**: When `true`, each node has a `loc` object attached
with `start` and `end` subobjects, each of which contains the
one-based line and zero-based column numbers in `{line, column}`
form. Default is `false`.
- **onToken**: If a function is passed for this option, each found
token will be passed in same format as tokens returned from
`tokenizer().getToken()`.
If array is passed, each found token is pushed to it.
Note that you are not allowed to call the parser from the
callback—that will corrupt its internal state.
- **onComment**: If a function is passed for this option, whenever a
comment is encountered the function will be called with the
following parameters:
- `block`: `true` if the comment is a block comment, false if it
is a line comment.
- `text`: The content of the comment.
- `start`: Character offset of the start of the comment.
- `end`: Character offset of the end of the comment.
When the `locations` options is on, the `{line, column}` locations
of the comment’s start and end are passed as two additional
parameters.
If array is passed for this option, each found comment is pushed
to it as object in Esprima format:
```javascript
{
"type": "Line" | "Block",
"value": "comment text",
"start": Number,
"end": Number,
// If `locations` option is on:
"loc": {
"start": {line: Number, column: Number}
"end": {line: Number, column: Number}
},
// If `ranges` option is on:
"range": [Number, Number]
}
```
Note that you are not allowed to call the parser from the
callback—that will corrupt its internal state.
- **ranges**: Nodes have their start and end characters offsets
recorded in `start` and `end` properties (directly on the node,
rather than the `loc` object, which holds line/column data. To also
add a
[semi-standardized](https://bugzilla.mozilla.org/show_bug.cgi?id=745678)
`range` property holding a `[start, end]` array with the same
numbers, set the `ranges` option to `true`.
- **program**: It is possible to parse multiple files into a single
AST by passing the tree produced by parsing the first file as the
`program` option in subsequent parses. This will add the toplevel
forms of the parsed file to the "Program" (top) node of an existing
parse tree.
- **sourceFile**: When the `locations` option is `true`, you can pass
this option to add a `source` attribute in every node’s `loc`
object. Note that the contents of this option are not examined or
processed in any way; you are free to use whatever format you
choose.
- **directSourceFile**: Like `sourceFile`, but a `sourceFile` property
will be added (regardless of the `location` option) directly to the
nodes, rather than the `loc` object.
- **preserveParens**: If this option is `true`, parenthesized expressions
are represented by (non-standard) `ParenthesizedExpression` nodes
that have a single `expression` property containing the expression
inside parentheses.
**parseExpressionAt**`(input, offset, options)` will parse a single
expression in a string, and return its AST. It will not complain if
there is more of the string left after the expression.
**tokenizer**`(input, options)` returns an object with a `getToken`
method that can be called repeatedly to get the next token, a `{start,
end, type, value}` object (with added `loc` property when the
`locations` option is enabled and `range` property when the `ranges`
option is enabled). When the token's type is `tokTypes.eof`, you
should stop calling the method, since it will keep returning that same
token forever.
In ES6 environment, returned result can be used as any other
protocol-compliant iterable:
```javascript
for (let token of acorn.tokenizer(str)) {
// iterate over the tokens
}
// transform code to array of tokens:
var tokens = [...acorn.tokenizer(str)];
```
**tokTypes** holds an object mapping names to the token type objects
that end up in the `type` properties of tokens.
**getLineInfo**`(input, offset)` can be used to get a `{line,
column}` object for a given program string and offset.
### The `Parser` class
Instances of the **`Parser`** class contain all the state and logic
that drives a parse. It has static methods `parse`,
`parseExpressionAt`, and `tokenizer` that match the top-level
functions by the same name.
When extending the parser with plugins, you need to call these methods
on the extended version of the class. To extend a parser with plugins,
you can use its static `extend` method.
```javascript
var acorn = require("acorn");
var jsx = require("acorn-jsx");
var JSXParser = acorn.Parser.extend(jsx());
JSXParser.parse("foo(<bar/>)", {ecmaVersion: 2020});
```
The `extend` method takes any number of plugin values, and returns a
new `Parser` class that includes the extra parser logic provided by
the plugins.
## Command line interface
The `bin/acorn` utility can be used to parse a file from the command
line. It accepts as arguments its input file and the following
options:
- `--ecma3|--ecma5|--ecma6|--ecma7|--ecma8|--ecma9|--ecma10`: Sets the ECMAScript version
to parse. Default is version 9.
- `--module`: Sets the parsing mode to `"module"`. Is set to `"script"` otherwise.
- `--locations`: Attaches a "loc" object to each node with "start" and
"end" subobjects, each of which contains the one-based line and
zero-based column numbers in `{line, column}` form.
- `--allow-hash-bang`: If the code starts with the characters #! (as
in a shellscript), the first line will be treated as a comment.
- `--allow-await-outside-function`: Allows top-level `await` expressions.
See the `allowAwaitOutsideFunction` option for more information.
- `--compact`: No whitespace is used in the AST output.
- `--silent`: Do not output the AST, just return the exit status.
- `--help`: Print the usage information and quit.
The utility spits out the syntax tree as JSON data.
## Existing plugins
- [`acorn-jsx`](https://github.com/RReverser/acorn-jsx): Parse [Facebook JSX syntax extensions](https://github.com/facebook/jsx)

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#!/usr/bin/env node
"use strict"
require("../dist/bin.js")

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export as namespace acorn
export = acorn
declare namespace acorn {
function parse(input: string, options: Options): Node
function parseExpressionAt(input: string, pos: number, options: Options): Node
function tokenizer(input: string, options: Options): {
getToken(): Token
[Symbol.iterator](): Iterator<Token>
}
type ecmaVersion = 3 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 'latest'
interface Options {
ecmaVersion: ecmaVersion
sourceType?: 'script' | 'module'
onInsertedSemicolon?: (lastTokEnd: number, lastTokEndLoc?: Position) => void
onTrailingComma?: (lastTokEnd: number, lastTokEndLoc?: Position) => void
allowReserved?: boolean | 'never'
allowReturnOutsideFunction?: boolean
allowImportExportEverywhere?: boolean
allowAwaitOutsideFunction?: boolean
allowSuperOutsideMethod?: boolean
allowHashBang?: boolean
locations?: boolean
onToken?: ((token: Token) => any) | Token[]
onComment?: ((
isBlock: boolean, text: string, start: number, end: number, startLoc?: Position,
endLoc?: Position
) => void) | Comment[]
ranges?: boolean
program?: Node
sourceFile?: string
directSourceFile?: string
preserveParens?: boolean
}
class Parser {
// state.js
lineStart: number;
options: Options;
curLine: number;
start: number;
end: number;
input: string;
type: TokenType;
// state.js
constructor(options: Options, input: string, startPos?: number)
parse(this: Parser): Node
// tokenize.js
next(): void;
nextToken(): void;
// statement.js
parseTopLevel(node: Node): Node;
// node.js
finishNode(node: Node, type: string): Node;
finishNodeAt(node: Node, type: string, pos: number, loc: Position): Node;
// location.js
raise(pos: number, message: string) : void;
raiseRecoverable?(pos: number, message: string) : void;
// parseutils.js
unexpected(pos: number) : void;
// index.js
static acorn: typeof acorn;
// state.js
static parse(this: typeof Parser, input: string, options: Options): Node
static parseExpressionAt(this: typeof Parser, input: string, pos: number, options: Options): Node
static tokenizer(this: typeof Parser, input: string, options: Options): {
getToken(): Token
[Symbol.iterator](): Iterator<Token>
}
static extend(this: typeof Parser, ...plugins: ((BaseParser: typeof Parser) => typeof Parser)[]): typeof Parser
}
interface Position { line: number; column: number; offset: number }
const defaultOptions: Options
function getLineInfo(input: string, offset: number): Position
class SourceLocation {
start: Position
end: Position
source?: string | null
constructor(p: Parser, start: Position, end: Position)
}
class Node {
type: string
start: number
end: number
loc?: SourceLocation
sourceFile?: string
range?: [number, number]
constructor(parser: Parser, pos: number, loc?: SourceLocation)
}
class TokenType {
label: string
keyword: string
beforeExpr: boolean
startsExpr: boolean
isLoop: boolean
isAssign: boolean
prefix: boolean
postfix: boolean
binop: number
updateContext?: (prevType: TokenType) => void
constructor(label: string, conf?: any)
}
const tokTypes: {
num: TokenType
regexp: TokenType
string: TokenType
name: TokenType
privateId: TokenType
eof: TokenType
bracketL: TokenType
bracketR: TokenType
braceL: TokenType
braceR: TokenType
parenL: TokenType
parenR: TokenType
comma: TokenType
semi: TokenType
colon: TokenType
dot: TokenType
question: TokenType
questionDot: TokenType
arrow: TokenType
template: TokenType
invalidTemplate: TokenType
ellipsis: TokenType
backQuote: TokenType
dollarBraceL: TokenType
eq: TokenType
assign: TokenType
incDec: TokenType
prefix: TokenType
logicalOR: TokenType
logicalAND: TokenType
bitwiseOR: TokenType
bitwiseXOR: TokenType
bitwiseAND: TokenType
equality: TokenType
relational: TokenType
bitShift: TokenType
plusMin: TokenType
modulo: TokenType
star: TokenType
slash: TokenType
starstar: TokenType
coalesce: TokenType
_break: TokenType
_case: TokenType
_catch: TokenType
_continue: TokenType
_debugger: TokenType
_default: TokenType
_do: TokenType
_else: TokenType
_finally: TokenType
_for: TokenType
_function: TokenType
_if: TokenType
_return: TokenType
_switch: TokenType
_throw: TokenType
_try: TokenType
_var: TokenType
_const: TokenType
_while: TokenType
_with: TokenType
_new: TokenType
_this: TokenType
_super: TokenType
_class: TokenType
_extends: TokenType
_export: TokenType
_import: TokenType
_null: TokenType
_true: TokenType
_false: TokenType
_in: TokenType
_instanceof: TokenType
_typeof: TokenType
_void: TokenType
_delete: TokenType
}
class TokContext {
constructor(token: string, isExpr: boolean, preserveSpace: boolean, override?: (p: Parser) => void)
}
const tokContexts: {
b_stat: TokContext
b_expr: TokContext
b_tmpl: TokContext
p_stat: TokContext
p_expr: TokContext
q_tmpl: TokContext
f_expr: TokContext
f_stat: TokContext
f_expr_gen: TokContext
f_gen: TokContext
}
function isIdentifierStart(code: number, astral?: boolean): boolean
function isIdentifierChar(code: number, astral?: boolean): boolean
interface AbstractToken {
}
interface Comment extends AbstractToken {
type: 'Line' | 'Block'
value: string
start: number
end: number
loc?: SourceLocation
range?: [number, number]
}
class Token {
type: TokenType
value: any
start: number
end: number
loc?: SourceLocation
range?: [number, number]
constructor(p: Parser)
}
function isNewLine(code: number): boolean
const lineBreak: RegExp
const lineBreakG: RegExp
const version: string
}

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import * as acorn from "./acorn";
export = acorn;

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'use strict';
var path = require('path');
var fs = require('fs');
var acorn = require('./acorn.js');
function _interopNamespace(e) {
if (e && e.__esModule) return e;
var n = Object.create(null);
if (e) {
Object.keys(e).forEach(function (k) {
if (k !== 'default') {
var d = Object.getOwnPropertyDescriptor(e, k);
Object.defineProperty(n, k, d.get ? d : {
enumerable: true,
get: function () { return e[k]; }
});
}
});
}
n["default"] = e;
return Object.freeze(n);
}
var acorn__namespace = /*#__PURE__*/_interopNamespace(acorn);
var inputFilePaths = [], forceFileName = false, fileMode = false, silent = false, compact = false, tokenize = false;
var options = {};
function help(status) {
var print = (status === 0) ? console.log : console.error;
print("usage: " + path.basename(process.argv[1]) + " [--ecma3|--ecma5|--ecma6|--ecma7|--ecma8|--ecma9|...|--ecma2015|--ecma2016|--ecma2017|--ecma2018|...]");
print(" [--tokenize] [--locations] [--allow-hash-bang] [--allow-await-outside-function] [--compact] [--silent] [--module] [--help] [--] [<infile>...]");
process.exit(status);
}
for (var i = 2; i < process.argv.length; ++i) {
var arg = process.argv[i];
if (arg[0] !== "-" || arg === "-") { inputFilePaths.push(arg); }
else if (arg === "--") {
inputFilePaths.push.apply(inputFilePaths, process.argv.slice(i + 1));
forceFileName = true;
break
} else if (arg === "--locations") { options.locations = true; }
else if (arg === "--allow-hash-bang") { options.allowHashBang = true; }
else if (arg === "--allow-await-outside-function") { options.allowAwaitOutsideFunction = true; }
else if (arg === "--silent") { silent = true; }
else if (arg === "--compact") { compact = true; }
else if (arg === "--help") { help(0); }
else if (arg === "--tokenize") { tokenize = true; }
else if (arg === "--module") { options.sourceType = "module"; }
else {
var match = arg.match(/^--ecma(\d+)$/);
if (match)
{ options.ecmaVersion = +match[1]; }
else
{ help(1); }
}
}
function run(codeList) {
var result = [], fileIdx = 0;
try {
codeList.forEach(function (code, idx) {
fileIdx = idx;
if (!tokenize) {
result = acorn__namespace.parse(code, options);
options.program = result;
} else {
var tokenizer = acorn__namespace.tokenizer(code, options), token;
do {
token = tokenizer.getToken();
result.push(token);
} while (token.type !== acorn__namespace.tokTypes.eof)
}
});
} catch (e) {
console.error(fileMode ? e.message.replace(/\(\d+:\d+\)$/, function (m) { return m.slice(0, 1) + inputFilePaths[fileIdx] + " " + m.slice(1); }) : e.message);
process.exit(1);
}
if (!silent) { console.log(JSON.stringify(result, null, compact ? null : 2)); }
}
if (fileMode = inputFilePaths.length && (forceFileName || !inputFilePaths.includes("-") || inputFilePaths.length !== 1)) {
run(inputFilePaths.map(function (path) { return fs.readFileSync(path, "utf8"); }));
} else {
var code = "";
process.stdin.resume();
process.stdin.on("data", function (chunk) { return code += chunk; });
process.stdin.on("end", function () { return run([code]); });
}

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{
"name": "acorn",
"description": "ECMAScript parser",
"homepage": "https://github.com/acornjs/acorn",
"main": "dist/acorn.js",
"types": "dist/acorn.d.ts",
"module": "dist/acorn.mjs",
"exports": {
".": [
{
"import": "./dist/acorn.mjs",
"require": "./dist/acorn.js",
"default": "./dist/acorn.js"
},
"./dist/acorn.js"
],
"./package.json": "./package.json"
},
"version": "8.8.1",
"engines": {
"node": ">=0.4.0"
},
"maintainers": [
{
"name": "Marijn Haverbeke",
"email": "marijnh@gmail.com",
"web": "https://marijnhaverbeke.nl"
},
{
"name": "Ingvar Stepanyan",
"email": "me@rreverser.com",
"web": "https://rreverser.com/"
},
{
"name": "Adrian Heine",
"web": "http://adrianheine.de"
}
],
"repository": {
"type": "git",
"url": "https://github.com/acornjs/acorn.git"
},
"license": "MIT",
"scripts": {
"prepare": "cd ..; npm run build:main"
},
"bin": {
"acorn": "./bin/acorn"
}
}

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agent-base
==========
### Turn a function into an [`http.Agent`][http.Agent] instance
[![Build Status](https://github.com/TooTallNate/node-agent-base/workflows/Node%20CI/badge.svg)](https://github.com/TooTallNate/node-agent-base/actions?workflow=Node+CI)
This module provides an `http.Agent` generator. That is, you pass it an async
callback function, and it returns a new `http.Agent` instance that will invoke the
given callback function when sending outbound HTTP requests.
#### Some subclasses:
Here's some more interesting uses of `agent-base`.
Send a pull request to list yours!
* [`http-proxy-agent`][http-proxy-agent]: An HTTP(s) proxy `http.Agent` implementation for HTTP endpoints
* [`https-proxy-agent`][https-proxy-agent]: An HTTP(s) proxy `http.Agent` implementation for HTTPS endpoints
* [`pac-proxy-agent`][pac-proxy-agent]: A PAC file proxy `http.Agent` implementation for HTTP and HTTPS
* [`socks-proxy-agent`][socks-proxy-agent]: A SOCKS proxy `http.Agent` implementation for HTTP and HTTPS
Installation
------------
Install with `npm`:
``` bash
$ npm install agent-base
```
Example
-------
Here's a minimal example that creates a new `net.Socket` connection to the server
for every HTTP request (i.e. the equivalent of `agent: false` option):
```js
var net = require('net');
var tls = require('tls');
var url = require('url');
var http = require('http');
var agent = require('agent-base');
var endpoint = 'http://nodejs.org/api/';
var parsed = url.parse(endpoint);
// This is the important part!
parsed.agent = agent(function (req, opts) {
var socket;
// `secureEndpoint` is true when using the https module
if (opts.secureEndpoint) {
socket = tls.connect(opts);
} else {
socket = net.connect(opts);
}
return socket;
});
// Everything else works just like normal...
http.get(parsed, function (res) {
console.log('"response" event!', res.headers);
res.pipe(process.stdout);
});
```
Returning a Promise or using an `async` function is also supported:
```js
agent(async function (req, opts) {
await sleep(1000);
// etc…
});
```
Return another `http.Agent` instance to "pass through" the responsibility
for that HTTP request to that agent:
```js
agent(function (req, opts) {
return opts.secureEndpoint ? https.globalAgent : http.globalAgent;
});
```
API
---
## Agent(Function callback[, Object options]) → [http.Agent][]
Creates a base `http.Agent` that will execute the callback function `callback`
for every HTTP request that it is used as the `agent` for. The callback function
is responsible for creating a `stream.Duplex` instance of some kind that will be
used as the underlying socket in the HTTP request.
The `options` object accepts the following properties:
* `timeout` - Number - Timeout for the `callback()` function in milliseconds. Defaults to Infinity (optional).
The callback function should have the following signature:
### callback(http.ClientRequest req, Object options, Function cb) → undefined
The ClientRequest `req` can be accessed to read request headers and
and the path, etc. The `options` object contains the options passed
to the `http.request()`/`https.request()` function call, and is formatted
to be directly passed to `net.connect()`/`tls.connect()`, or however
else you want a Socket to be created. Pass the created socket to
the callback function `cb` once created, and the HTTP request will
continue to proceed.
If the `https` module is used to invoke the HTTP request, then the
`secureEndpoint` property on `options` _will be set to `true`_.
License
-------
(The MIT License)
Copyright (c) 2013 Nathan Rajlich &lt;nathan@tootallnate.net&gt;
Permission is hereby granted, free of charge, to any person obtaining
a copy of this software and associated documentation files (the
'Software'), to deal in the Software without restriction, including
without limitation the rights to use, copy, modify, merge, publish,
distribute, sublicense, and/or sell copies of the Software, and to
permit persons to whom the Software is furnished to do so, subject to
the following conditions:
The above copyright notice and this permission notice shall be
included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
[http-proxy-agent]: https://github.com/TooTallNate/node-http-proxy-agent
[https-proxy-agent]: https://github.com/TooTallNate/node-https-proxy-agent
[pac-proxy-agent]: https://github.com/TooTallNate/node-pac-proxy-agent
[socks-proxy-agent]: https://github.com/TooTallNate/node-socks-proxy-agent
[http.Agent]: https://nodejs.org/api/http.html#http_class_http_agent

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/// <reference types="node" />
import net from 'net';
import http from 'http';
import https from 'https';
import { Duplex } from 'stream';
import { EventEmitter } from 'events';
declare function createAgent(opts?: createAgent.AgentOptions): createAgent.Agent;
declare function createAgent(callback: createAgent.AgentCallback, opts?: createAgent.AgentOptions): createAgent.Agent;
declare namespace createAgent {
interface ClientRequest extends http.ClientRequest {
_last?: boolean;
_hadError?: boolean;
method: string;
}
interface AgentRequestOptions {
host?: string;
path?: string;
port: number;
}
interface HttpRequestOptions extends AgentRequestOptions, Omit<http.RequestOptions, keyof AgentRequestOptions> {
secureEndpoint: false;
}
interface HttpsRequestOptions extends AgentRequestOptions, Omit<https.RequestOptions, keyof AgentRequestOptions> {
secureEndpoint: true;
}
type RequestOptions = HttpRequestOptions | HttpsRequestOptions;
type AgentLike = Pick<createAgent.Agent, 'addRequest'> | http.Agent;
type AgentCallbackReturn = Duplex | AgentLike;
type AgentCallbackCallback = (err?: Error | null, socket?: createAgent.AgentCallbackReturn) => void;
type AgentCallbackPromise = (req: createAgent.ClientRequest, opts: createAgent.RequestOptions) => createAgent.AgentCallbackReturn | Promise<createAgent.AgentCallbackReturn>;
type AgentCallback = typeof Agent.prototype.callback;
type AgentOptions = {
timeout?: number;
};
/**
* Base `http.Agent` implementation.
* No pooling/keep-alive is implemented by default.
*
* @param {Function} callback
* @api public
*/
class Agent extends EventEmitter {
timeout: number | null;
maxFreeSockets: number;
maxTotalSockets: number;
maxSockets: number;
sockets: {
[key: string]: net.Socket[];
};
freeSockets: {
[key: string]: net.Socket[];
};
requests: {
[key: string]: http.IncomingMessage[];
};
options: https.AgentOptions;
private promisifiedCallback?;
private explicitDefaultPort?;
private explicitProtocol?;
constructor(callback?: createAgent.AgentCallback | createAgent.AgentOptions, _opts?: createAgent.AgentOptions);
get defaultPort(): number;
set defaultPort(v: number);
get protocol(): string;
set protocol(v: string);
callback(req: createAgent.ClientRequest, opts: createAgent.RequestOptions, fn: createAgent.AgentCallbackCallback): void;
callback(req: createAgent.ClientRequest, opts: createAgent.RequestOptions): createAgent.AgentCallbackReturn | Promise<createAgent.AgentCallbackReturn>;
/**
* Called by node-core's "_http_client.js" module when creating
* a new HTTP request with this Agent instance.
*
* @api public
*/
addRequest(req: ClientRequest, _opts: RequestOptions): void;
freeSocket(socket: net.Socket, opts: AgentOptions): void;
destroy(): void;
}
}
export = createAgent;

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"use strict";
var __importDefault = (this && this.__importDefault) || function (mod) {
return (mod && mod.__esModule) ? mod : { "default": mod };
};
const events_1 = require("events");
const debug_1 = __importDefault(require("debug"));
const promisify_1 = __importDefault(require("./promisify"));
const debug = debug_1.default('agent-base');
function isAgent(v) {
return Boolean(v) && typeof v.addRequest === 'function';
}
function isSecureEndpoint() {
const { stack } = new Error();
if (typeof stack !== 'string')
return false;
return stack.split('\n').some(l => l.indexOf('(https.js:') !== -1 || l.indexOf('node:https:') !== -1);
}
function createAgent(callback, opts) {
return new createAgent.Agent(callback, opts);
}
(function (createAgent) {
/**
* Base `http.Agent` implementation.
* No pooling/keep-alive is implemented by default.
*
* @param {Function} callback
* @api public
*/
class Agent extends events_1.EventEmitter {
constructor(callback, _opts) {
super();
let opts = _opts;
if (typeof callback === 'function') {
this.callback = callback;
}
else if (callback) {
opts = callback;
}
// Timeout for the socket to be returned from the callback
this.timeout = null;
if (opts && typeof opts.timeout === 'number') {
this.timeout = opts.timeout;
}
// These aren't actually used by `agent-base`, but are required
// for the TypeScript definition files in `@types/node` :/
this.maxFreeSockets = 1;
this.maxSockets = 1;
this.maxTotalSockets = Infinity;
this.sockets = {};
this.freeSockets = {};
this.requests = {};
this.options = {};
}
get defaultPort() {
if (typeof this.explicitDefaultPort === 'number') {
return this.explicitDefaultPort;
}
return isSecureEndpoint() ? 443 : 80;
}
set defaultPort(v) {
this.explicitDefaultPort = v;
}
get protocol() {
if (typeof this.explicitProtocol === 'string') {
return this.explicitProtocol;
}
return isSecureEndpoint() ? 'https:' : 'http:';
}
set protocol(v) {
this.explicitProtocol = v;
}
callback(req, opts, fn) {
throw new Error('"agent-base" has no default implementation, you must subclass and override `callback()`');
}
/**
* Called by node-core's "_http_client.js" module when creating
* a new HTTP request with this Agent instance.
*
* @api public
*/
addRequest(req, _opts) {
const opts = Object.assign({}, _opts);
if (typeof opts.secureEndpoint !== 'boolean') {
opts.secureEndpoint = isSecureEndpoint();
}
if (opts.host == null) {
opts.host = 'localhost';
}
if (opts.port == null) {
opts.port = opts.secureEndpoint ? 443 : 80;
}
if (opts.protocol == null) {
opts.protocol = opts.secureEndpoint ? 'https:' : 'http:';
}
if (opts.host && opts.path) {
// If both a `host` and `path` are specified then it's most
// likely the result of a `url.parse()` call... we need to
// remove the `path` portion so that `net.connect()` doesn't
// attempt to open that as a unix socket file.
delete opts.path;
}
delete opts.agent;
delete opts.hostname;
delete opts._defaultAgent;
delete opts.defaultPort;
delete opts.createConnection;
// Hint to use "Connection: close"
// XXX: non-documented `http` module API :(
req._last = true;
req.shouldKeepAlive = false;
let timedOut = false;
let timeoutId = null;
const timeoutMs = opts.timeout || this.timeout;
const onerror = (err) => {
if (req._hadError)
return;
req.emit('error', err);
// For Safety. Some additional errors might fire later on
// and we need to make sure we don't double-fire the error event.
req._hadError = true;
};
const ontimeout = () => {
timeoutId = null;
timedOut = true;
const err = new Error(`A "socket" was not created for HTTP request before ${timeoutMs}ms`);
err.code = 'ETIMEOUT';
onerror(err);
};
const callbackError = (err) => {
if (timedOut)
return;
if (timeoutId !== null) {
clearTimeout(timeoutId);
timeoutId = null;
}
onerror(err);
};
const onsocket = (socket) => {
if (timedOut)
return;
if (timeoutId != null) {
clearTimeout(timeoutId);
timeoutId = null;
}
if (isAgent(socket)) {
// `socket` is actually an `http.Agent` instance, so
// relinquish responsibility for this `req` to the Agent
// from here on
debug('Callback returned another Agent instance %o', socket.constructor.name);
socket.addRequest(req, opts);
return;
}
if (socket) {
socket.once('free', () => {
this.freeSocket(socket, opts);
});
req.onSocket(socket);
return;
}
const err = new Error(`no Duplex stream was returned to agent-base for \`${req.method} ${req.path}\``);
onerror(err);
};
if (typeof this.callback !== 'function') {
onerror(new Error('`callback` is not defined'));
return;
}
if (!this.promisifiedCallback) {
if (this.callback.length >= 3) {
debug('Converting legacy callback function to promise');
this.promisifiedCallback = promisify_1.default(this.callback);
}
else {
this.promisifiedCallback = this.callback;
}
}
if (typeof timeoutMs === 'number' && timeoutMs > 0) {
timeoutId = setTimeout(ontimeout, timeoutMs);
}
if ('port' in opts && typeof opts.port !== 'number') {
opts.port = Number(opts.port);
}
try {
debug('Resolving socket for %o request: %o', opts.protocol, `${req.method} ${req.path}`);
Promise.resolve(this.promisifiedCallback(req, opts)).then(onsocket, callbackError);
}
catch (err) {
Promise.reject(err).catch(callbackError);
}
}
freeSocket(socket, opts) {
debug('Freeing socket %o %o', socket.constructor.name, opts);
socket.destroy();
}
destroy() {
debug('Destroying agent %o', this.constructor.name);
}
}
createAgent.Agent = Agent;
// So that `instanceof` works correctly
createAgent.prototype = createAgent.Agent.prototype;
})(createAgent || (createAgent = {}));
module.exports = createAgent;
//# sourceMappingURL=index.js.map

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import { ClientRequest, RequestOptions, AgentCallbackCallback, AgentCallbackPromise } from './index';
declare type LegacyCallback = (req: ClientRequest, opts: RequestOptions, fn: AgentCallbackCallback) => void;
export default function promisify(fn: LegacyCallback): AgentCallbackPromise;
export {};

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"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
function promisify(fn) {
return function (req, opts) {
return new Promise((resolve, reject) => {
fn.call(this, req, opts, (err, rtn) => {
if (err) {
reject(err);
}
else {
resolve(rtn);
}
});
});
};
}
exports.default = promisify;
//# sourceMappingURL=promisify.js.map

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{"version":3,"file":"promisify.js","sourceRoot":"","sources":["../../src/promisify.ts"],"names":[],"mappings":";;AAeA,SAAwB,SAAS,CAAC,EAAkB;IACnD,OAAO,UAAsB,GAAkB,EAAE,IAAoB;QACpE,OAAO,IAAI,OAAO,CAAC,CAAC,OAAO,EAAE,MAAM,EAAE,EAAE;YACtC,EAAE,CAAC,IAAI,CACN,IAAI,EACJ,GAAG,EACH,IAAI,EACJ,CAAC,GAA6B,EAAE,GAAyB,EAAE,EAAE;gBAC5D,IAAI,GAAG,EAAE;oBACR,MAAM,CAAC,GAAG,CAAC,CAAC;iBACZ;qBAAM;oBACN,OAAO,CAAC,GAAG,CAAC,CAAC;iBACb;YACF,CAAC,CACD,CAAC;QACH,CAAC,CAAC,CAAC;IACJ,CAAC,CAAC;AACH,CAAC;AAjBD,4BAiBC"}

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{
"name": "agent-base",
"version": "6.0.2",
"description": "Turn a function into an `http.Agent` instance",
"main": "dist/src/index",
"typings": "dist/src/index",
"files": [
"dist/src",
"src"
],
"scripts": {
"prebuild": "rimraf dist",
"build": "tsc",
"postbuild": "cpy --parents src test '!**/*.ts' dist",
"test": "mocha --reporter spec dist/test/*.js",
"test-lint": "eslint src --ext .js,.ts",
"prepublishOnly": "npm run build"
},
"repository": {
"type": "git",
"url": "git://github.com/TooTallNate/node-agent-base.git"
},
"keywords": [
"http",
"agent",
"base",
"barebones",
"https"
],
"author": "Nathan Rajlich <nathan@tootallnate.net> (http://n8.io/)",
"license": "MIT",
"bugs": {
"url": "https://github.com/TooTallNate/node-agent-base/issues"
},
"dependencies": {
"debug": "4"
},
"devDependencies": {
"@types/debug": "4",
"@types/mocha": "^5.2.7",
"@types/node": "^14.0.20",
"@types/semver": "^7.1.0",
"@types/ws": "^6.0.3",
"@typescript-eslint/eslint-plugin": "1.6.0",
"@typescript-eslint/parser": "1.1.0",
"async-listen": "^1.2.0",
"cpy-cli": "^2.0.0",
"eslint": "5.16.0",
"eslint-config-airbnb": "17.1.0",
"eslint-config-prettier": "4.1.0",
"eslint-import-resolver-typescript": "1.1.1",
"eslint-plugin-import": "2.16.0",
"eslint-plugin-jsx-a11y": "6.2.1",
"eslint-plugin-react": "7.12.4",
"mocha": "^6.2.0",
"rimraf": "^3.0.0",
"semver": "^7.1.2",
"typescript": "^3.5.3",
"ws": "^3.0.0"
},
"engines": {
"node": ">= 6.0.0"
}
}

345
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import net from 'net';
import http from 'http';
import https from 'https';
import { Duplex } from 'stream';
import { EventEmitter } from 'events';
import createDebug from 'debug';
import promisify from './promisify';
const debug = createDebug('agent-base');
function isAgent(v: any): v is createAgent.AgentLike {
return Boolean(v) && typeof v.addRequest === 'function';
}
function isSecureEndpoint(): boolean {
const { stack } = new Error();
if (typeof stack !== 'string') return false;
return stack.split('\n').some(l => l.indexOf('(https.js:') !== -1 || l.indexOf('node:https:') !== -1);
}
function createAgent(opts?: createAgent.AgentOptions): createAgent.Agent;
function createAgent(
callback: createAgent.AgentCallback,
opts?: createAgent.AgentOptions
): createAgent.Agent;
function createAgent(
callback?: createAgent.AgentCallback | createAgent.AgentOptions,
opts?: createAgent.AgentOptions
) {
return new createAgent.Agent(callback, opts);
}
namespace createAgent {
export interface ClientRequest extends http.ClientRequest {
_last?: boolean;
_hadError?: boolean;
method: string;
}
export interface AgentRequestOptions {
host?: string;
path?: string;
// `port` on `http.RequestOptions` can be a string or undefined,
// but `net.TcpNetConnectOpts` expects only a number
port: number;
}
export interface HttpRequestOptions
extends AgentRequestOptions,
Omit<http.RequestOptions, keyof AgentRequestOptions> {
secureEndpoint: false;
}
export interface HttpsRequestOptions
extends AgentRequestOptions,
Omit<https.RequestOptions, keyof AgentRequestOptions> {
secureEndpoint: true;
}
export type RequestOptions = HttpRequestOptions | HttpsRequestOptions;
export type AgentLike = Pick<createAgent.Agent, 'addRequest'> | http.Agent;
export type AgentCallbackReturn = Duplex | AgentLike;
export type AgentCallbackCallback = (
err?: Error | null,
socket?: createAgent.AgentCallbackReturn
) => void;
export type AgentCallbackPromise = (
req: createAgent.ClientRequest,
opts: createAgent.RequestOptions
) =>
| createAgent.AgentCallbackReturn
| Promise<createAgent.AgentCallbackReturn>;
export type AgentCallback = typeof Agent.prototype.callback;
export type AgentOptions = {
timeout?: number;
};
/**
* Base `http.Agent` implementation.
* No pooling/keep-alive is implemented by default.
*
* @param {Function} callback
* @api public
*/
export class Agent extends EventEmitter {
public timeout: number | null;
public maxFreeSockets: number;
public maxTotalSockets: number;
public maxSockets: number;
public sockets: {
[key: string]: net.Socket[];
};
public freeSockets: {
[key: string]: net.Socket[];
};
public requests: {
[key: string]: http.IncomingMessage[];
};
public options: https.AgentOptions;
private promisifiedCallback?: createAgent.AgentCallbackPromise;
private explicitDefaultPort?: number;
private explicitProtocol?: string;
constructor(
callback?: createAgent.AgentCallback | createAgent.AgentOptions,
_opts?: createAgent.AgentOptions
) {
super();
let opts = _opts;
if (typeof callback === 'function') {
this.callback = callback;
} else if (callback) {
opts = callback;
}
// Timeout for the socket to be returned from the callback
this.timeout = null;
if (opts && typeof opts.timeout === 'number') {
this.timeout = opts.timeout;
}
// These aren't actually used by `agent-base`, but are required
// for the TypeScript definition files in `@types/node` :/
this.maxFreeSockets = 1;
this.maxSockets = 1;
this.maxTotalSockets = Infinity;
this.sockets = {};
this.freeSockets = {};
this.requests = {};
this.options = {};
}
get defaultPort(): number {
if (typeof this.explicitDefaultPort === 'number') {
return this.explicitDefaultPort;
}
return isSecureEndpoint() ? 443 : 80;
}
set defaultPort(v: number) {
this.explicitDefaultPort = v;
}
get protocol(): string {
if (typeof this.explicitProtocol === 'string') {
return this.explicitProtocol;
}
return isSecureEndpoint() ? 'https:' : 'http:';
}
set protocol(v: string) {
this.explicitProtocol = v;
}
callback(
req: createAgent.ClientRequest,
opts: createAgent.RequestOptions,
fn: createAgent.AgentCallbackCallback
): void;
callback(
req: createAgent.ClientRequest,
opts: createAgent.RequestOptions
):
| createAgent.AgentCallbackReturn
| Promise<createAgent.AgentCallbackReturn>;
callback(
req: createAgent.ClientRequest,
opts: createAgent.AgentOptions,
fn?: createAgent.AgentCallbackCallback
):
| createAgent.AgentCallbackReturn
| Promise<createAgent.AgentCallbackReturn>
| void {
throw new Error(
'"agent-base" has no default implementation, you must subclass and override `callback()`'
);
}
/**
* Called by node-core's "_http_client.js" module when creating
* a new HTTP request with this Agent instance.
*
* @api public
*/
addRequest(req: ClientRequest, _opts: RequestOptions): void {
const opts: RequestOptions = { ..._opts };
if (typeof opts.secureEndpoint !== 'boolean') {
opts.secureEndpoint = isSecureEndpoint();
}
if (opts.host == null) {
opts.host = 'localhost';
}
if (opts.port == null) {
opts.port = opts.secureEndpoint ? 443 : 80;
}
if (opts.protocol == null) {
opts.protocol = opts.secureEndpoint ? 'https:' : 'http:';
}
if (opts.host && opts.path) {
// If both a `host` and `path` are specified then it's most
// likely the result of a `url.parse()` call... we need to
// remove the `path` portion so that `net.connect()` doesn't
// attempt to open that as a unix socket file.
delete opts.path;
}
delete opts.agent;
delete opts.hostname;
delete opts._defaultAgent;
delete opts.defaultPort;
delete opts.createConnection;
// Hint to use "Connection: close"
// XXX: non-documented `http` module API :(
req._last = true;
req.shouldKeepAlive = false;
let timedOut = false;
let timeoutId: ReturnType<typeof setTimeout> | null = null;
const timeoutMs = opts.timeout || this.timeout;
const onerror = (err: NodeJS.ErrnoException) => {
if (req._hadError) return;
req.emit('error', err);
// For Safety. Some additional errors might fire later on
// and we need to make sure we don't double-fire the error event.
req._hadError = true;
};
const ontimeout = () => {
timeoutId = null;
timedOut = true;
const err: NodeJS.ErrnoException = new Error(
`A "socket" was not created for HTTP request before ${timeoutMs}ms`
);
err.code = 'ETIMEOUT';
onerror(err);
};
const callbackError = (err: NodeJS.ErrnoException) => {
if (timedOut) return;
if (timeoutId !== null) {
clearTimeout(timeoutId);
timeoutId = null;
}
onerror(err);
};
const onsocket = (socket: AgentCallbackReturn) => {
if (timedOut) return;
if (timeoutId != null) {
clearTimeout(timeoutId);
timeoutId = null;
}
if (isAgent(socket)) {
// `socket` is actually an `http.Agent` instance, so
// relinquish responsibility for this `req` to the Agent
// from here on
debug(
'Callback returned another Agent instance %o',
socket.constructor.name
);
(socket as createAgent.Agent).addRequest(req, opts);
return;
}
if (socket) {
socket.once('free', () => {
this.freeSocket(socket as net.Socket, opts);
});
req.onSocket(socket as net.Socket);
return;
}
const err = new Error(
`no Duplex stream was returned to agent-base for \`${req.method} ${req.path}\``
);
onerror(err);
};
if (typeof this.callback !== 'function') {
onerror(new Error('`callback` is not defined'));
return;
}
if (!this.promisifiedCallback) {
if (this.callback.length >= 3) {
debug('Converting legacy callback function to promise');
this.promisifiedCallback = promisify(this.callback);
} else {
this.promisifiedCallback = this.callback;
}
}
if (typeof timeoutMs === 'number' && timeoutMs > 0) {
timeoutId = setTimeout(ontimeout, timeoutMs);
}
if ('port' in opts && typeof opts.port !== 'number') {
opts.port = Number(opts.port);
}
try {
debug(
'Resolving socket for %o request: %o',
opts.protocol,
`${req.method} ${req.path}`
);
Promise.resolve(this.promisifiedCallback(req, opts)).then(
onsocket,
callbackError
);
} catch (err) {
Promise.reject(err).catch(callbackError);
}
}
freeSocket(socket: net.Socket, opts: AgentOptions) {
debug('Freeing socket %o %o', socket.constructor.name, opts);
socket.destroy();
}
destroy() {
debug('Destroying agent %o', this.constructor.name);
}
}
// So that `instanceof` works correctly
createAgent.prototype = createAgent.Agent.prototype;
}
export = createAgent;

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import {
Agent,
ClientRequest,
RequestOptions,
AgentCallbackCallback,
AgentCallbackPromise,
AgentCallbackReturn
} from './index';
type LegacyCallback = (
req: ClientRequest,
opts: RequestOptions,
fn: AgentCallbackCallback
) => void;
export default function promisify(fn: LegacyCallback): AgentCallbackPromise {
return function(this: Agent, req: ClientRequest, opts: RequestOptions) {
return new Promise((resolve, reject) => {
fn.call(
this,
req,
opts,
(err: Error | null | undefined, rtn?: AgentCallbackReturn) => {
if (err) {
reject(err);
} else {
resolve(rtn);
}
}
);
});
};
}

21
node_modules/asynckit/LICENSE generated vendored Normal file
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@ -0,0 +1,21 @@
The MIT License (MIT)
Copyright (c) 2016 Alex Indigo
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

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# asynckit [![NPM Module](https://img.shields.io/npm/v/asynckit.svg?style=flat)](https://www.npmjs.com/package/asynckit)
Minimal async jobs utility library, with streams support.
[![PhantomJS Build](https://img.shields.io/travis/alexindigo/asynckit/v0.4.0.svg?label=browser&style=flat)](https://travis-ci.org/alexindigo/asynckit)
[![Linux Build](https://img.shields.io/travis/alexindigo/asynckit/v0.4.0.svg?label=linux:0.12-6.x&style=flat)](https://travis-ci.org/alexindigo/asynckit)
[![Windows Build](https://img.shields.io/appveyor/ci/alexindigo/asynckit/v0.4.0.svg?label=windows:0.12-6.x&style=flat)](https://ci.appveyor.com/project/alexindigo/asynckit)
[![Coverage Status](https://img.shields.io/coveralls/alexindigo/asynckit/v0.4.0.svg?label=code+coverage&style=flat)](https://coveralls.io/github/alexindigo/asynckit?branch=master)
[![Dependency Status](https://img.shields.io/david/alexindigo/asynckit/v0.4.0.svg?style=flat)](https://david-dm.org/alexindigo/asynckit)
[![bitHound Overall Score](https://www.bithound.io/github/alexindigo/asynckit/badges/score.svg)](https://www.bithound.io/github/alexindigo/asynckit)
<!-- [![Readme](https://img.shields.io/badge/readme-tested-brightgreen.svg?style=flat)](https://www.npmjs.com/package/reamde) -->
AsyncKit provides harness for `parallel` and `serial` iterators over list of items represented by arrays or objects.
Optionally it accepts abort function (should be synchronously return by iterator for each item), and terminates left over jobs upon an error event. For specific iteration order built-in (`ascending` and `descending`) and custom sort helpers also supported, via `asynckit.serialOrdered` method.
It ensures async operations to keep behavior more stable and prevent `Maximum call stack size exceeded` errors, from sync iterators.
| compression | size |
| :----------------- | -------: |
| asynckit.js | 12.34 kB |
| asynckit.min.js | 4.11 kB |
| asynckit.min.js.gz | 1.47 kB |
## Install
```sh
$ npm install --save asynckit
```
## Examples
### Parallel Jobs
Runs iterator over provided array in parallel. Stores output in the `result` array,
on the matching positions. In unlikely event of an error from one of the jobs,
will terminate rest of the active jobs (if abort function is provided)
and return error along with salvaged data to the main callback function.
#### Input Array
```javascript
var parallel = require('asynckit').parallel
, assert = require('assert')
;
var source = [ 1, 1, 4, 16, 64, 32, 8, 2 ]
, expectedResult = [ 2, 2, 8, 32, 128, 64, 16, 4 ]
, expectedTarget = [ 1, 1, 2, 4, 8, 16, 32, 64 ]
, target = []
;
parallel(source, asyncJob, function(err, result)
{
assert.deepEqual(result, expectedResult);
assert.deepEqual(target, expectedTarget);
});
// async job accepts one element from the array
// and a callback function
function asyncJob(item, cb)
{
// different delays (in ms) per item
var delay = item * 25;
// pretend different jobs take different time to finish
// and not in consequential order
var timeoutId = setTimeout(function() {
target.push(item);
cb(null, item * 2);
}, delay);
// allow to cancel "leftover" jobs upon error
// return function, invoking of which will abort this job
return clearTimeout.bind(null, timeoutId);
}
```
More examples could be found in [test/test-parallel-array.js](test/test-parallel-array.js).
#### Input Object
Also it supports named jobs, listed via object.
```javascript
var parallel = require('asynckit/parallel')
, assert = require('assert')
;
var source = { first: 1, one: 1, four: 4, sixteen: 16, sixtyFour: 64, thirtyTwo: 32, eight: 8, two: 2 }
, expectedResult = { first: 2, one: 2, four: 8, sixteen: 32, sixtyFour: 128, thirtyTwo: 64, eight: 16, two: 4 }
, expectedTarget = [ 1, 1, 2, 4, 8, 16, 32, 64 ]
, expectedKeys = [ 'first', 'one', 'two', 'four', 'eight', 'sixteen', 'thirtyTwo', 'sixtyFour' ]
, target = []
, keys = []
;
parallel(source, asyncJob, function(err, result)
{
assert.deepEqual(result, expectedResult);
assert.deepEqual(target, expectedTarget);
assert.deepEqual(keys, expectedKeys);
});
// supports full value, key, callback (shortcut) interface
function asyncJob(item, key, cb)
{
// different delays (in ms) per item
var delay = item * 25;
// pretend different jobs take different time to finish
// and not in consequential order
var timeoutId = setTimeout(function() {
keys.push(key);
target.push(item);
cb(null, item * 2);
}, delay);
// allow to cancel "leftover" jobs upon error
// return function, invoking of which will abort this job
return clearTimeout.bind(null, timeoutId);
}
```
More examples could be found in [test/test-parallel-object.js](test/test-parallel-object.js).
### Serial Jobs
Runs iterator over provided array sequentially. Stores output in the `result` array,
on the matching positions. In unlikely event of an error from one of the jobs,
will not proceed to the rest of the items in the list
and return error along with salvaged data to the main callback function.
#### Input Array
```javascript
var serial = require('asynckit/serial')
, assert = require('assert')
;
var source = [ 1, 1, 4, 16, 64, 32, 8, 2 ]
, expectedResult = [ 2, 2, 8, 32, 128, 64, 16, 4 ]
, expectedTarget = [ 0, 1, 2, 3, 4, 5, 6, 7 ]
, target = []
;
serial(source, asyncJob, function(err, result)
{
assert.deepEqual(result, expectedResult);
assert.deepEqual(target, expectedTarget);
});
// extended interface (item, key, callback)
// also supported for arrays
function asyncJob(item, key, cb)
{
target.push(key);
// it will be automatically made async
// even it iterator "returns" in the same event loop
cb(null, item * 2);
}
```
More examples could be found in [test/test-serial-array.js](test/test-serial-array.js).
#### Input Object
Also it supports named jobs, listed via object.
```javascript
var serial = require('asynckit').serial
, assert = require('assert')
;
var source = [ 1, 1, 4, 16, 64, 32, 8, 2 ]
, expectedResult = [ 2, 2, 8, 32, 128, 64, 16, 4 ]
, expectedTarget = [ 0, 1, 2, 3, 4, 5, 6, 7 ]
, target = []
;
var source = { first: 1, one: 1, four: 4, sixteen: 16, sixtyFour: 64, thirtyTwo: 32, eight: 8, two: 2 }
, expectedResult = { first: 2, one: 2, four: 8, sixteen: 32, sixtyFour: 128, thirtyTwo: 64, eight: 16, two: 4 }
, expectedTarget = [ 1, 1, 4, 16, 64, 32, 8, 2 ]
, target = []
;
serial(source, asyncJob, function(err, result)
{
assert.deepEqual(result, expectedResult);
assert.deepEqual(target, expectedTarget);
});
// shortcut interface (item, callback)
// works for object as well as for the arrays
function asyncJob(item, cb)
{
target.push(item);
// it will be automatically made async
// even it iterator "returns" in the same event loop
cb(null, item * 2);
}
```
More examples could be found in [test/test-serial-object.js](test/test-serial-object.js).
_Note: Since _object_ is an _unordered_ collection of properties,
it may produce unexpected results with sequential iterations.
Whenever order of the jobs' execution is important please use `serialOrdered` method._
### Ordered Serial Iterations
TBD
For example [compare-property](compare-property) package.
### Streaming interface
TBD
## Want to Know More?
More examples can be found in [test folder](test/).
Or open an [issue](https://github.com/alexindigo/asynckit/issues) with questions and/or suggestions.
## License
AsyncKit is licensed under the MIT license.

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/* eslint no-console: "off" */
var asynckit = require('./')
, async = require('async')
, assert = require('assert')
, expected = 0
;
var Benchmark = require('benchmark');
var suite = new Benchmark.Suite;
var source = [];
for (var z = 1; z < 100; z++)
{
source.push(z);
expected += z;
}
suite
// add tests
.add('async.map', function(deferred)
{
var total = 0;
async.map(source,
function(i, cb)
{
setImmediate(function()
{
total += i;
cb(null, total);
});
},
function(err, result)
{
assert.ifError(err);
assert.equal(result[result.length - 1], expected);
deferred.resolve();
});
}, {'defer': true})
.add('asynckit.parallel', function(deferred)
{
var total = 0;
asynckit.parallel(source,
function(i, cb)
{
setImmediate(function()
{
total += i;
cb(null, total);
});
},
function(err, result)
{
assert.ifError(err);
assert.equal(result[result.length - 1], expected);
deferred.resolve();
});
}, {'defer': true})
// add listeners
.on('cycle', function(ev)
{
console.log(String(ev.target));
})
.on('complete', function()
{
console.log('Fastest is ' + this.filter('fastest').map('name'));
})
// run async
.run({ 'async': true });

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module.exports =
{
parallel : require('./parallel.js'),
serial : require('./serial.js'),
serialOrdered : require('./serialOrdered.js')
};

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// API
module.exports = abort;
/**
* Aborts leftover active jobs
*
* @param {object} state - current state object
*/
function abort(state)
{
Object.keys(state.jobs).forEach(clean.bind(state));
// reset leftover jobs
state.jobs = {};
}
/**
* Cleans up leftover job by invoking abort function for the provided job id
*
* @this state
* @param {string|number} key - job id to abort
*/
function clean(key)
{
if (typeof this.jobs[key] == 'function')
{
this.jobs[key]();
}
}

34
node_modules/asynckit/lib/async.js generated vendored Normal file
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var defer = require('./defer.js');
// API
module.exports = async;
/**
* Runs provided callback asynchronously
* even if callback itself is not
*
* @param {function} callback - callback to invoke
* @returns {function} - augmented callback
*/
function async(callback)
{
var isAsync = false;
// check if async happened
defer(function() { isAsync = true; });
return function async_callback(err, result)
{
if (isAsync)
{
callback(err, result);
}
else
{
defer(function nextTick_callback()
{
callback(err, result);
});
}
};
}

26
node_modules/asynckit/lib/defer.js generated vendored Normal file
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module.exports = defer;
/**
* Runs provided function on next iteration of the event loop
*
* @param {function} fn - function to run
*/
function defer(fn)
{
var nextTick = typeof setImmediate == 'function'
? setImmediate
: (
typeof process == 'object' && typeof process.nextTick == 'function'
? process.nextTick
: null
);
if (nextTick)
{
nextTick(fn);
}
else
{
setTimeout(fn, 0);
}
}

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var async = require('./async.js')
, abort = require('./abort.js')
;
// API
module.exports = iterate;
/**
* Iterates over each job object
*
* @param {array|object} list - array or object (named list) to iterate over
* @param {function} iterator - iterator to run
* @param {object} state - current job status
* @param {function} callback - invoked when all elements processed
*/
function iterate(list, iterator, state, callback)
{
// store current index
var key = state['keyedList'] ? state['keyedList'][state.index] : state.index;
state.jobs[key] = runJob(iterator, key, list[key], function(error, output)
{
// don't repeat yourself
// skip secondary callbacks
if (!(key in state.jobs))
{
return;
}
// clean up jobs
delete state.jobs[key];
if (error)
{
// don't process rest of the results
// stop still active jobs
// and reset the list
abort(state);
}
else
{
state.results[key] = output;
}
// return salvaged results
callback(error, state.results);
});
}
/**
* Runs iterator over provided job element
*
* @param {function} iterator - iterator to invoke
* @param {string|number} key - key/index of the element in the list of jobs
* @param {mixed} item - job description
* @param {function} callback - invoked after iterator is done with the job
* @returns {function|mixed} - job abort function or something else
*/
function runJob(iterator, key, item, callback)
{
var aborter;
// allow shortcut if iterator expects only two arguments
if (iterator.length == 2)
{
aborter = iterator(item, async(callback));
}
// otherwise go with full three arguments
else
{
aborter = iterator(item, key, async(callback));
}
return aborter;
}

91
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var streamify = require('./streamify.js')
, defer = require('./defer.js')
;
// API
module.exports = ReadableAsyncKit;
/**
* Base constructor for all streams
* used to hold properties/methods
*/
function ReadableAsyncKit()
{
ReadableAsyncKit.super_.apply(this, arguments);
// list of active jobs
this.jobs = {};
// add stream methods
this.destroy = destroy;
this._start = _start;
this._read = _read;
}
/**
* Destroys readable stream,
* by aborting outstanding jobs
*
* @returns {void}
*/
function destroy()
{
if (this.destroyed)
{
return;
}
this.destroyed = true;
if (typeof this.terminator == 'function')
{
this.terminator();
}
}
/**
* Starts provided jobs in async manner
*
* @private
*/
function _start()
{
// first argument – runner function
var runner = arguments[0]
// take away first argument
, args = Array.prototype.slice.call(arguments, 1)
// second argument - input data
, input = args[0]
// last argument - result callback
, endCb = streamify.callback.call(this, args[args.length - 1])
;
args[args.length - 1] = endCb;
// third argument - iterator
args[1] = streamify.iterator.call(this, args[1]);
// allow time for proper setup
defer(function()
{
if (!this.destroyed)
{
this.terminator = runner.apply(null, args);
}
else
{
endCb(null, Array.isArray(input) ? [] : {});
}
}.bind(this));
}
/**
* Implement _read to comply with Readable streams
* Doesn't really make sense for flowing object mode
*
* @private
*/
function _read()
{
}

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var parallel = require('../parallel.js');
// API
module.exports = ReadableParallel;
/**
* Streaming wrapper to `asynckit.parallel`
*
* @param {array|object} list - array or object (named list) to iterate over
* @param {function} iterator - iterator to run
* @param {function} callback - invoked when all elements processed
* @returns {stream.Readable#}
*/
function ReadableParallel(list, iterator, callback)
{
if (!(this instanceof ReadableParallel))
{
return new ReadableParallel(list, iterator, callback);
}
// turn on object mode
ReadableParallel.super_.call(this, {objectMode: true});
this._start(parallel, list, iterator, callback);
}

25
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var serial = require('../serial.js');
// API
module.exports = ReadableSerial;
/**
* Streaming wrapper to `asynckit.serial`
*
* @param {array|object} list - array or object (named list) to iterate over
* @param {function} iterator - iterator to run
* @param {function} callback - invoked when all elements processed
* @returns {stream.Readable#}
*/
function ReadableSerial(list, iterator, callback)
{
if (!(this instanceof ReadableSerial))
{
return new ReadableSerial(list, iterator, callback);
}
// turn on object mode
ReadableSerial.super_.call(this, {objectMode: true});
this._start(serial, list, iterator, callback);
}

29
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var serialOrdered = require('../serialOrdered.js');
// API
module.exports = ReadableSerialOrdered;
// expose sort helpers
module.exports.ascending = serialOrdered.ascending;
module.exports.descending = serialOrdered.descending;
/**
* Streaming wrapper to `asynckit.serialOrdered`
*
* @param {array|object} list - array or object (named list) to iterate over
* @param {function} iterator - iterator to run
* @param {function} sortMethod - custom sort function
* @param {function} callback - invoked when all elements processed
* @returns {stream.Readable#}
*/
function ReadableSerialOrdered(list, iterator, sortMethod, callback)
{
if (!(this instanceof ReadableSerialOrdered))
{
return new ReadableSerialOrdered(list, iterator, sortMethod, callback);
}
// turn on object mode
ReadableSerialOrdered.super_.call(this, {objectMode: true});
this._start(serialOrdered, list, iterator, sortMethod, callback);
}

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// API
module.exports = state;
/**
* Creates initial state object
* for iteration over list
*
* @param {array|object} list - list to iterate over
* @param {function|null} sortMethod - function to use for keys sort,
* or `null` to keep them as is
* @returns {object} - initial state object
*/
function state(list, sortMethod)
{
var isNamedList = !Array.isArray(list)
, initState =
{
index : 0,
keyedList: isNamedList || sortMethod ? Object.keys(list) : null,
jobs : {},
results : isNamedList ? {} : [],
size : isNamedList ? Object.keys(list).length : list.length
}
;
if (sortMethod)
{
// sort array keys based on it's values
// sort object's keys just on own merit
initState.keyedList.sort(isNamedList ? sortMethod : function(a, b)
{
return sortMethod(list[a], list[b]);
});
}
return initState;
}

141
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var async = require('./async.js');
// API
module.exports = {
iterator: wrapIterator,
callback: wrapCallback
};
/**
* Wraps iterators with long signature
*
* @this ReadableAsyncKit#
* @param {function} iterator - function to wrap
* @returns {function} - wrapped function
*/
function wrapIterator(iterator)
{
var stream = this;
return function(item, key, cb)
{
var aborter
, wrappedCb = async(wrapIteratorCallback.call(stream, cb, key))
;
stream.jobs[key] = wrappedCb;
// it's either shortcut (item, cb)
if (iterator.length == 2)
{
aborter = iterator(item, wrappedCb);
}
// or long format (item, key, cb)
else
{
aborter = iterator(item, key, wrappedCb);
}
return aborter;
};
}
/**
* Wraps provided callback function
* allowing to execute snitch function before
* real callback
*
* @this ReadableAsyncKit#
* @param {function} callback - function to wrap
* @returns {function} - wrapped function
*/
function wrapCallback(callback)
{
var stream = this;
var wrapped = function(error, result)
{
return finisher.call(stream, error, result, callback);
};
return wrapped;
}
/**
* Wraps provided iterator callback function
* makes sure snitch only called once,
* but passes secondary calls to the original callback
*
* @this ReadableAsyncKit#
* @param {function} callback - callback to wrap
* @param {number|string} key - iteration key
* @returns {function} wrapped callback
*/
function wrapIteratorCallback(callback, key)
{
var stream = this;
return function(error, output)
{
// don't repeat yourself
if (!(key in stream.jobs))
{
callback(error, output);
return;
}
// clean up jobs
delete stream.jobs[key];
return streamer.call(stream, error, {key: key, value: output}, callback);
};
}
/**
* Stream wrapper for iterator callback
*
* @this ReadableAsyncKit#
* @param {mixed} error - error response
* @param {mixed} output - iterator output
* @param {function} callback - callback that expects iterator results
*/
function streamer(error, output, callback)
{
if (error && !this.error)
{
this.error = error;
this.pause();
this.emit('error', error);
// send back value only, as expected
callback(error, output && output.value);
return;
}
// stream stuff
this.push(output);
// back to original track
// send back value only, as expected
callback(error, output && output.value);
}
/**
* Stream wrapper for finishing callback
*
* @this ReadableAsyncKit#
* @param {mixed} error - error response
* @param {mixed} output - iterator output
* @param {function} callback - callback that expects final results
*/
function finisher(error, output, callback)
{
// signal end of the stream
// only for successfully finished streams
if (!error)
{
this.push(null);
}
// back to original track
callback(error, output);
}

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var abort = require('./abort.js')
, async = require('./async.js')
;
// API
module.exports = terminator;
/**
* Terminates jobs in the attached state context
*
* @this AsyncKitState#
* @param {function} callback - final callback to invoke after termination
*/
function terminator(callback)
{
if (!Object.keys(this.jobs).length)
{
return;
}
// fast forward iteration index
this.index = this.size;
// abort jobs
abort(this);
// send back results we have so far
async(callback)(null, this.results);
}

63
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{
"name": "asynckit",
"version": "0.4.0",
"description": "Minimal async jobs utility library, with streams support",
"main": "index.js",
"scripts": {
"clean": "rimraf coverage",
"lint": "eslint *.js lib/*.js test/*.js",
"test": "istanbul cover --reporter=json tape -- 'test/test-*.js' | tap-spec",
"win-test": "tape test/test-*.js",
"browser": "browserify -t browserify-istanbul test/lib/browserify_adjustment.js test/test-*.js | obake --coverage | tap-spec",
"report": "istanbul report",
"size": "browserify index.js | size-table asynckit",
"debug": "tape test/test-*.js"
},
"pre-commit": [
"clean",
"lint",
"test",
"browser",
"report",
"size"
],
"repository": {
"type": "git",
"url": "git+https://github.com/alexindigo/asynckit.git"
},
"keywords": [
"async",
"jobs",
"parallel",
"serial",
"iterator",
"array",
"object",
"stream",
"destroy",
"terminate",
"abort"
],
"author": "Alex Indigo <iam@alexindigo.com>",
"license": "MIT",
"bugs": {
"url": "https://github.com/alexindigo/asynckit/issues"
},
"homepage": "https://github.com/alexindigo/asynckit#readme",
"devDependencies": {
"browserify": "^13.0.0",
"browserify-istanbul": "^2.0.0",
"coveralls": "^2.11.9",
"eslint": "^2.9.0",
"istanbul": "^0.4.3",
"obake": "^0.1.2",
"phantomjs-prebuilt": "^2.1.7",
"pre-commit": "^1.1.3",
"reamde": "^1.1.0",
"rimraf": "^2.5.2",
"size-table": "^0.2.0",
"tap-spec": "^4.1.1",
"tape": "^4.5.1"
},
"dependencies": {}
}

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var iterate = require('./lib/iterate.js')
, initState = require('./lib/state.js')
, terminator = require('./lib/terminator.js')
;
// Public API
module.exports = parallel;
/**
* Runs iterator over provided array elements in parallel
*
* @param {array|object} list - array or object (named list) to iterate over
* @param {function} iterator - iterator to run
* @param {function} callback - invoked when all elements processed
* @returns {function} - jobs terminator
*/
function parallel(list, iterator, callback)
{
var state = initState(list);
while (state.index < (state['keyedList'] || list).length)
{
iterate(list, iterator, state, function(error, result)
{
if (error)
{
callback(error, result);
return;
}
// looks like it's the last one
if (Object.keys(state.jobs).length === 0)
{
callback(null, state.results);
return;
}
});
state.index++;
}
return terminator.bind(state, callback);
}

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var serialOrdered = require('./serialOrdered.js');
// Public API
module.exports = serial;
/**
* Runs iterator over provided array elements in series
*
* @param {array|object} list - array or object (named list) to iterate over
* @param {function} iterator - iterator to run
* @param {function} callback - invoked when all elements processed
* @returns {function} - jobs terminator
*/
function serial(list, iterator, callback)
{
return serialOrdered(list, iterator, null, callback);
}

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var iterate = require('./lib/iterate.js')
, initState = require('./lib/state.js')
, terminator = require('./lib/terminator.js')
;
// Public API
module.exports = serialOrdered;
// sorting helpers
module.exports.ascending = ascending;
module.exports.descending = descending;
/**
* Runs iterator over provided sorted array elements in series
*
* @param {array|object} list - array or object (named list) to iterate over
* @param {function} iterator - iterator to run
* @param {function} sortMethod - custom sort function
* @param {function} callback - invoked when all elements processed
* @returns {function} - jobs terminator
*/
function serialOrdered(list, iterator, sortMethod, callback)
{
var state = initState(list, sortMethod);
iterate(list, iterator, state, function iteratorHandler(error, result)
{
if (error)
{
callback(error, result);
return;
}
state.index++;
// are we there yet?
if (state.index < (state['keyedList'] || list).length)
{
iterate(list, iterator, state, iteratorHandler);
return;
}
// done here
callback(null, state.results);
});
return terminator.bind(state, callback);
}
/*
* -- Sort methods
*/
/**
* sort helper to sort array elements in ascending order
*
* @param {mixed} a - an item to compare
* @param {mixed} b - an item to compare
* @returns {number} - comparison result
*/
function ascending(a, b)
{
return a < b ? -1 : a > b ? 1 : 0;
}
/**
* sort helper to sort array elements in descending order
*
* @param {mixed} a - an item to compare
* @param {mixed} b - an item to compare
* @returns {number} - comparison result
*/
function descending(a, b)
{
return -1 * ascending(a, b);
}

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var inherits = require('util').inherits
, Readable = require('stream').Readable
, ReadableAsyncKit = require('./lib/readable_asynckit.js')
, ReadableParallel = require('./lib/readable_parallel.js')
, ReadableSerial = require('./lib/readable_serial.js')
, ReadableSerialOrdered = require('./lib/readable_serial_ordered.js')
;
// API
module.exports =
{
parallel : ReadableParallel,
serial : ReadableSerial,
serialOrdered : ReadableSerialOrdered,
};
inherits(ReadableAsyncKit, Readable);
inherits(ReadableParallel, ReadableAsyncKit);
inherits(ReadableSerial, ReadableAsyncKit);
inherits(ReadableSerialOrdered, ReadableAsyncKit);

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Copyright (c) 2011 Debuggable Limited <felix@debuggable.com>
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.

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# combined-stream
A stream that emits multiple other streams one after another.
**NB** Currently `combined-stream` works with streams version 1 only. There is ongoing effort to switch this library to streams version 2. Any help is welcome. :) Meanwhile you can explore other libraries that provide streams2 support with more or less compatibility with `combined-stream`.
- [combined-stream2](https://www.npmjs.com/package/combined-stream2): A drop-in streams2-compatible replacement for the combined-stream module.
- [multistream](https://www.npmjs.com/package/multistream): A stream that emits multiple other streams one after another.
## Installation
``` bash
npm install combined-stream
```
## Usage
Here is a simple example that shows how you can use combined-stream to combine
two files into one:
``` javascript
var CombinedStream = require('combined-stream');
var fs = require('fs');
var combinedStream = CombinedStream.create();
combinedStream.append(fs.createReadStream('file1.txt'));
combinedStream.append(fs.createReadStream('file2.txt'));
combinedStream.pipe(fs.createWriteStream('combined.txt'));
```
While the example above works great, it will pause all source streams until
they are needed. If you don't want that to happen, you can set `pauseStreams`
to `false`:
``` javascript
var CombinedStream = require('combined-stream');
var fs = require('fs');
var combinedStream = CombinedStream.create({pauseStreams: false});
combinedStream.append(fs.createReadStream('file1.txt'));
combinedStream.append(fs.createReadStream('file2.txt'));
combinedStream.pipe(fs.createWriteStream('combined.txt'));
```
However, what if you don't have all the source streams yet, or you don't want
to allocate the resources (file descriptors, memory, etc.) for them right away?
Well, in that case you can simply provide a callback that supplies the stream
by calling a `next()` function:
``` javascript
var CombinedStream = require('combined-stream');
var fs = require('fs');
var combinedStream = CombinedStream.create();
combinedStream.append(function(next) {
next(fs.createReadStream('file1.txt'));
});
combinedStream.append(function(next) {
next(fs.createReadStream('file2.txt'));
});
combinedStream.pipe(fs.createWriteStream('combined.txt'));
```
## API
### CombinedStream.create([options])
Returns a new combined stream object. Available options are:
* `maxDataSize`
* `pauseStreams`
The effect of those options is described below.
### combinedStream.pauseStreams = `true`
Whether to apply back pressure to the underlaying streams. If set to `false`,
the underlaying streams will never be paused. If set to `true`, the
underlaying streams will be paused right after being appended, as well as when
`delayedStream.pipe()` wants to throttle.
### combinedStream.maxDataSize = `2 * 1024 * 1024`
The maximum amount of bytes (or characters) to buffer for all source streams.
If this value is exceeded, `combinedStream` emits an `'error'` event.
### combinedStream.dataSize = `0`
The amount of bytes (or characters) currently buffered by `combinedStream`.
### combinedStream.append(stream)
Appends the given `stream` to the combinedStream object. If `pauseStreams` is
set to `true, this stream will also be paused right away.
`streams` can also be a function that takes one parameter called `next`. `next`
is a function that must be invoked in order to provide the `next` stream, see
example above.
Regardless of how the `stream` is appended, combined-stream always attaches an
`'error'` listener to it, so you don't have to do that manually.
Special case: `stream` can also be a String or Buffer.
### combinedStream.write(data)
You should not call this, `combinedStream` takes care of piping the appended
streams into itself for you.
### combinedStream.resume()
Causes `combinedStream` to start drain the streams it manages. The function is
idempotent, and also emits a `'resume'` event each time which usually goes to
the stream that is currently being drained.
### combinedStream.pause();
If `combinedStream.pauseStreams` is set to `false`, this does nothing.
Otherwise a `'pause'` event is emitted, this goes to the stream that is
currently being drained, so you can use it to apply back pressure.
### combinedStream.end();
Sets `combinedStream.writable` to false, emits an `'end'` event, and removes
all streams from the queue.
### combinedStream.destroy();
Same as `combinedStream.end()`, except it emits a `'close'` event instead of
`'end'`.
## License
combined-stream is licensed under the MIT license.

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var util = require('util');
var Stream = require('stream').Stream;
var DelayedStream = require('delayed-stream');
module.exports = CombinedStream;
function CombinedStream() {
this.writable = false;
this.readable = true;
this.dataSize = 0;
this.maxDataSize = 2 * 1024 * 1024;
this.pauseStreams = true;
this._released = false;
this._streams = [];
this._currentStream = null;
this._insideLoop = false;
this._pendingNext = false;
}
util.inherits(CombinedStream, Stream);
CombinedStream.create = function(options) {
var combinedStream = new this();
options = options || {};
for (var option in options) {
combinedStream[option] = options[option];
}
return combinedStream;
};
CombinedStream.isStreamLike = function(stream) {
return (typeof stream !== 'function')
&& (typeof stream !== 'string')
&& (typeof stream !== 'boolean')
&& (typeof stream !== 'number')
&& (!Buffer.isBuffer(stream));
};
CombinedStream.prototype.append = function(stream) {
var isStreamLike = CombinedStream.isStreamLike(stream);
if (isStreamLike) {
if (!(stream instanceof DelayedStream)) {
var newStream = DelayedStream.create(stream, {
maxDataSize: Infinity,
pauseStream: this.pauseStreams,
});
stream.on('data', this._checkDataSize.bind(this));
stream = newStream;
}
this._handleErrors(stream);
if (this.pauseStreams) {
stream.pause();
}
}
this._streams.push(stream);
return this;
};
CombinedStream.prototype.pipe = function(dest, options) {
Stream.prototype.pipe.call(this, dest, options);
this.resume();
return dest;
};
CombinedStream.prototype._getNext = function() {
this._currentStream = null;
if (this._insideLoop) {
this._pendingNext = true;
return; // defer call
}
this._insideLoop = true;
try {
do {
this._pendingNext = false;
this._realGetNext();
} while (this._pendingNext);
} finally {
this._insideLoop = false;
}
};
CombinedStream.prototype._realGetNext = function() {
var stream = this._streams.shift();
if (typeof stream == 'undefined') {
this.end();
return;
}
if (typeof stream !== 'function') {
this._pipeNext(stream);
return;
}
var getStream = stream;
getStream(function(stream) {
var isStreamLike = CombinedStream.isStreamLike(stream);
if (isStreamLike) {
stream.on('data', this._checkDataSize.bind(this));
this._handleErrors(stream);
}
this._pipeNext(stream);
}.bind(this));
};
CombinedStream.prototype._pipeNext = function(stream) {
this._currentStream = stream;
var isStreamLike = CombinedStream.isStreamLike(stream);
if (isStreamLike) {
stream.on('end', this._getNext.bind(this));
stream.pipe(this, {end: false});
return;
}
var value = stream;
this.write(value);
this._getNext();
};
CombinedStream.prototype._handleErrors = function(stream) {
var self = this;
stream.on('error', function(err) {
self._emitError(err);
});
};
CombinedStream.prototype.write = function(data) {
this.emit('data', data);
};
CombinedStream.prototype.pause = function() {
if (!this.pauseStreams) {
return;
}
if(this.pauseStreams && this._currentStream && typeof(this._currentStream.pause) == 'function') this._currentStream.pause();
this.emit('pause');
};
CombinedStream.prototype.resume = function() {
if (!this._released) {
this._released = true;
this.writable = true;
this._getNext();
}
if(this.pauseStreams && this._currentStream && typeof(this._currentStream.resume) == 'function') this._currentStream.resume();
this.emit('resume');
};
CombinedStream.prototype.end = function() {
this._reset();
this.emit('end');
};
CombinedStream.prototype.destroy = function() {
this._reset();
this.emit('close');
};
CombinedStream.prototype._reset = function() {
this.writable = false;
this._streams = [];
this._currentStream = null;
};
CombinedStream.prototype._checkDataSize = function() {
this._updateDataSize();
if (this.dataSize <= this.maxDataSize) {
return;
}
var message =
'DelayedStream#maxDataSize of ' + this.maxDataSize + ' bytes exceeded.';
this._emitError(new Error(message));
};
CombinedStream.prototype._updateDataSize = function() {
this.dataSize = 0;
var self = this;
this._streams.forEach(function(stream) {
if (!stream.dataSize) {
return;
}
self.dataSize += stream.dataSize;
});
if (this._currentStream && this._currentStream.dataSize) {
this.dataSize += this._currentStream.dataSize;
}
};
CombinedStream.prototype._emitError = function(err) {
this._reset();
this.emit('error', err);
};

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{
"author": "Felix Geisendörfer <felix@debuggable.com> (http://debuggable.com/)",
"name": "combined-stream",
"description": "A stream that emits multiple other streams one after another.",
"version": "1.0.8",
"homepage": "https://github.com/felixge/node-combined-stream",
"repository": {
"type": "git",
"url": "git://github.com/felixge/node-combined-stream.git"
},
"main": "./lib/combined_stream",
"scripts": {
"test": "node test/run.js"
},
"engines": {
"node": ">= 0.8"
},
"dependencies": {
"delayed-stream": "~1.0.0"
},
"devDependencies": {
"far": "~0.0.7"
},
"license": "MIT"
}

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# THIS IS AN AUTOGENERATED FILE. DO NOT EDIT THIS FILE DIRECTLY.
# yarn lockfile v1
delayed-stream@~1.0.0:
version "1.0.0"
resolved "https://registry.yarnpkg.com/delayed-stream/-/delayed-stream-1.0.0.tgz#df3ae199acadfb7d440aaae0b29e2272b24ec619"
far@~0.0.7:
version "0.0.7"
resolved "https://registry.yarnpkg.com/far/-/far-0.0.7.tgz#01c1fd362bcd26ce9cf161af3938aa34619f79a7"
dependencies:
oop "0.0.3"
oop@0.0.3:
version "0.0.3"
resolved "https://registry.yarnpkg.com/oop/-/oop-0.0.3.tgz#70fa405a5650891a194fdc82ca68dad6dabf4401"

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Copyright (c) Nikita Vasilyev
Permission is hereby granted, free of charge, to any person obtaining
a copy of this software and associated documentation files (the
"Software"), to deal in the Software without restriction, including
without limitation the rights to use, copy, modify, merge, publish,
distribute, sublicense, and/or sell copies of the Software, and to
permit persons to whom the Software is furnished to do so, subject to
the following conditions:
The above copyright notice and this permission notice shall be
included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

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# CSSOM
CSSOM.js is a CSS parser written in pure JavaScript. It is also a partial implementation of [CSS Object Model](http://dev.w3.org/csswg/cssom/).
CSSOM.parse("body {color: black}")
-> {
cssRules: [
{
selectorText: "body",
style: {
0: "color",
color: "black",
length: 1
}
}
]
}
## [Parser demo](http://nv.github.com/CSSOM/docs/parse.html)
Works well in Google Chrome 6+, Safari 5+, Firefox 3.6+, Opera 10.63+.
Doesn't work in IE < 9 because of unsupported getters/setters.
To use CSSOM.js in the browser you might want to build a one-file version that exposes a single `CSSOM` global variable:
➤ git clone https://github.com/NV/CSSOM.git
➤ cd CSSOM
➤ node build.js
build/CSSOM.js is done
To use it with Node.js or any other CommonJS loader:
➤ npm install cssom
## Don’t use it if...
You parse CSS to mungle, minify or reformat code like this:
```css
div {
background: gray;
background: linear-gradient(to bottom, white 0%, black 100%);
}
```
This pattern is often used to give browsers that don’t understand linear gradients a fallback solution (e.g. gray color in the example).
In CSSOM, `background: gray` [gets overwritten](http://nv.github.io/CSSOM/docs/parse.html#css=div%20%7B%0A%20%20%20%20%20%20background%3A%20gray%3B%0A%20%20%20%20background%3A%20linear-gradient(to%20bottom%2C%20white%200%25%2C%20black%20100%25)%3B%0A%7D).
It does **NOT** get preserved.
If you do CSS mungling, minification, or image inlining, considere using one of the following:
* [postcss](https://github.com/postcss/postcss)
* [reworkcss/css](https://github.com/reworkcss/css)
* [csso](https://github.com/css/csso)
* [mensch](https://github.com/brettstimmerman/mensch)
## [Tests](http://nv.github.com/CSSOM/spec/)
To run tests locally:
➤ git submodule init
➤ git submodule update
## [Who uses CSSOM.js](https://github.com/NV/CSSOM/wiki/Who-uses-CSSOM.js)

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//.CommonJS
var CSSOM = {
CSSRule: require("./CSSRule").CSSRule,
CSSGroupingRule: require("./CSSGroupingRule").CSSGroupingRule
};
///CommonJS
/**
* @constructor
* @see https://www.w3.org/TR/css-conditional-3/#the-cssconditionrule-interface
*/
CSSOM.CSSConditionRule = function CSSConditionRule() {
CSSOM.CSSGroupingRule.call(this);
this.cssRules = [];
};
CSSOM.CSSConditionRule.prototype = new CSSOM.CSSGroupingRule();
CSSOM.CSSConditionRule.prototype.constructor = CSSOM.CSSConditionRule;
CSSOM.CSSConditionRule.prototype.conditionText = ''
CSSOM.CSSConditionRule.prototype.cssText = ''
//.CommonJS
exports.CSSConditionRule = CSSOM.CSSConditionRule;
///CommonJS

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//.CommonJS
var CSSOM = {
CSSRule: require("./CSSRule").CSSRule,
MatcherList: require("./MatcherList").MatcherList
};
///CommonJS
/**
* @constructor
* @see https://developer.mozilla.org/en/CSS/@-moz-document
*/
CSSOM.CSSDocumentRule = function CSSDocumentRule() {
CSSOM.CSSRule.call(this);
this.matcher = new CSSOM.MatcherList();
this.cssRules = [];
};
CSSOM.CSSDocumentRule.prototype = new CSSOM.CSSRule();
CSSOM.CSSDocumentRule.prototype.constructor = CSSOM.CSSDocumentRule;
CSSOM.CSSDocumentRule.prototype.type = 10;
//FIXME
//CSSOM.CSSDocumentRule.prototype.insertRule = CSSStyleSheet.prototype.insertRule;
//CSSOM.CSSDocumentRule.prototype.deleteRule = CSSStyleSheet.prototype.deleteRule;
Object.defineProperty(CSSOM.CSSDocumentRule.prototype, "cssText", {
get: function() {
var cssTexts = [];
for (var i=0, length=this.cssRules.length; i < length; i++) {
cssTexts.push(this.cssRules[i].cssText);
}
return "@-moz-document " + this.matcher.matcherText + " {" + cssTexts.join("") + "}";
}
});
//.CommonJS
exports.CSSDocumentRule = CSSOM.CSSDocumentRule;
///CommonJS

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//.CommonJS
var CSSOM = {
CSSStyleDeclaration: require("./CSSStyleDeclaration").CSSStyleDeclaration,
CSSRule: require("./CSSRule").CSSRule
};
///CommonJS
/**
* @constructor
* @see http://dev.w3.org/csswg/cssom/#css-font-face-rule
*/
CSSOM.CSSFontFaceRule = function CSSFontFaceRule() {
CSSOM.CSSRule.call(this);
this.style = new CSSOM.CSSStyleDeclaration();
this.style.parentRule = this;
};
CSSOM.CSSFontFaceRule.prototype = new CSSOM.CSSRule();
CSSOM.CSSFontFaceRule.prototype.constructor = CSSOM.CSSFontFaceRule;
CSSOM.CSSFontFaceRule.prototype.type = 5;
//FIXME
//CSSOM.CSSFontFaceRule.prototype.insertRule = CSSStyleSheet.prototype.insertRule;
//CSSOM.CSSFontFaceRule.prototype.deleteRule = CSSStyleSheet.prototype.deleteRule;
// http://www.opensource.apple.com/source/WebCore/WebCore-955.66.1/css/WebKitCSSFontFaceRule.cpp
Object.defineProperty(CSSOM.CSSFontFaceRule.prototype, "cssText", {
get: function() {
return "@font-face {" + this.style.cssText + "}";
}
});
//.CommonJS
exports.CSSFontFaceRule = CSSOM.CSSFontFaceRule;
///CommonJS

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//.CommonJS
var CSSOM = {
CSSRule: require("./CSSRule").CSSRule
};
///CommonJS
/**
* @constructor
* @see https://drafts.csswg.org/cssom/#the-cssgroupingrule-interface
*/
CSSOM.CSSGroupingRule = function CSSGroupingRule() {
CSSOM.CSSRule.call(this);
this.cssRules = [];
};
CSSOM.CSSGroupingRule.prototype = new CSSOM.CSSRule();
CSSOM.CSSGroupingRule.prototype.constructor = CSSOM.CSSGroupingRule;
/**
* Used to insert a new CSS rule to a list of CSS rules.
*
* @example
* cssGroupingRule.cssText
* -> "body{margin:0;}"
* cssGroupingRule.insertRule("img{border:none;}", 1)
* -> 1
* cssGroupingRule.cssText
* -> "body{margin:0;}img{border:none;}"
*
* @param {string} rule
* @param {number} [index]
* @see https://www.w3.org/TR/cssom-1/#dom-cssgroupingrule-insertrule
* @return {number} The index within the grouping rule's collection of the newly inserted rule.
*/
CSSOM.CSSGroupingRule.prototype.insertRule = function insertRule(rule, index) {
if (index < 0 || index > this.cssRules.length) {
throw new RangeError("INDEX_SIZE_ERR");
}
var cssRule = CSSOM.parse(rule).cssRules[0];
cssRule.parentRule = this;
this.cssRules.splice(index, 0, cssRule);
return index;
};
/**
* Used to delete a rule from the grouping rule.
*
* cssGroupingRule.cssText
* -> "img{border:none;}body{margin:0;}"
* cssGroupingRule.deleteRule(0)
* cssGroupingRule.cssText
* -> "body{margin:0;}"
*
* @param {number} index within the grouping rule's rule list of the rule to remove.
* @see https://www.w3.org/TR/cssom-1/#dom-cssgroupingrule-deleterule
*/
CSSOM.CSSGroupingRule.prototype.deleteRule = function deleteRule(index) {
if (index < 0 || index >= this.cssRules.length) {
throw new RangeError("INDEX_SIZE_ERR");
}
this.cssRules.splice(index, 1)[0].parentRule = null;
};
//.CommonJS
exports.CSSGroupingRule = CSSOM.CSSGroupingRule;
///CommonJS

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//.CommonJS
var CSSOM = {
CSSRule: require("./CSSRule").CSSRule
};
///CommonJS
/**
* @constructor
* @see http://www.w3.org/TR/shadow-dom/#host-at-rule
*/
CSSOM.CSSHostRule = function CSSHostRule() {
CSSOM.CSSRule.call(this);
this.cssRules = [];
};
CSSOM.CSSHostRule.prototype = new CSSOM.CSSRule();
CSSOM.CSSHostRule.prototype.constructor = CSSOM.CSSHostRule;
CSSOM.CSSHostRule.prototype.type = 1001;
//FIXME
//CSSOM.CSSHostRule.prototype.insertRule = CSSStyleSheet.prototype.insertRule;
//CSSOM.CSSHostRule.prototype.deleteRule = CSSStyleSheet.prototype.deleteRule;
Object.defineProperty(CSSOM.CSSHostRule.prototype, "cssText", {
get: function() {
var cssTexts = [];
for (var i=0, length=this.cssRules.length; i < length; i++) {
cssTexts.push(this.cssRules[i].cssText);
}
return "@host {" + cssTexts.join("") + "}";
}
});
//.CommonJS
exports.CSSHostRule = CSSOM.CSSHostRule;
///CommonJS

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//.CommonJS
var CSSOM = {
CSSRule: require("./CSSRule").CSSRule,
CSSStyleSheet: require("./CSSStyleSheet").CSSStyleSheet,
MediaList: require("./MediaList").MediaList
};
///CommonJS
/**
* @constructor
* @see http://dev.w3.org/csswg/cssom/#cssimportrule
* @see http://www.w3.org/TR/DOM-Level-2-Style/css.html#CSS-CSSImportRule
*/
CSSOM.CSSImportRule = function CSSImportRule() {
CSSOM.CSSRule.call(this);
this.href = "";
this.media = new CSSOM.MediaList();
this.styleSheet = new CSSOM.CSSStyleSheet();
};
CSSOM.CSSImportRule.prototype = new CSSOM.CSSRule();
CSSOM.CSSImportRule.prototype.constructor = CSSOM.CSSImportRule;
CSSOM.CSSImportRule.prototype.type = 3;
Object.defineProperty(CSSOM.CSSImportRule.prototype, "cssText", {
get: function() {
var mediaText = this.media.mediaText;
return "@import url(" + this.href + ")" + (mediaText ? " " + mediaText : "") + ";";
},
set: function(cssText) {
var i = 0;
/**
* @import url(partial.css) screen, handheld;
* || |
* after-import media
* |
* url
*/
var state = '';
var buffer = '';
var index;
for (var character; (character = cssText.charAt(i)); i++) {
switch (character) {
case ' ':
case '\t':
case '\r':
case '\n':
case '\f':
if (state === 'after-import') {
state = 'url';
} else {
buffer += character;
}
break;
case '@':
if (!state && cssText.indexOf('@import', i) === i) {
state = 'after-import';
i += 'import'.length;
buffer = '';
}
break;
case 'u':
if (state === 'url' && cssText.indexOf('url(', i) === i) {
index = cssText.indexOf(')', i + 1);
if (index === -1) {
throw i + ': ")" not found';
}
i += 'url('.length;
var url = cssText.slice(i, index);
if (url[0] === url[url.length - 1]) {
if (url[0] === '"' || url[0] === "'") {
url = url.slice(1, -1);
}
}
this.href = url;
i = index;
state = 'media';
}
break;
case '"':
if (state === 'url') {
index = cssText.indexOf('"', i + 1);
if (!index) {
throw i + ": '\"' not found";
}
this.href = cssText.slice(i + 1, index);
i = index;
state = 'media';
}
break;
case "'":
if (state === 'url') {
index = cssText.indexOf("'", i + 1);
if (!index) {
throw i + ': "\'" not found';
}
this.href = cssText.slice(i + 1, index);
i = index;
state = 'media';
}
break;
case ';':
if (state === 'media') {
if (buffer) {
this.media.mediaText = buffer.trim();
}
}
break;
default:
if (state === 'media') {
buffer += character;
}
break;
}
}
}
});
//.CommonJS
exports.CSSImportRule = CSSOM.CSSImportRule;
///CommonJS

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//.CommonJS
var CSSOM = {
CSSRule: require("./CSSRule").CSSRule,
CSSStyleDeclaration: require('./CSSStyleDeclaration').CSSStyleDeclaration
};
///CommonJS
/**
* @constructor
* @see http://www.w3.org/TR/css3-animations/#DOM-CSSKeyframeRule
*/
CSSOM.CSSKeyframeRule = function CSSKeyframeRule() {
CSSOM.CSSRule.call(this);
this.keyText = '';
this.style = new CSSOM.CSSStyleDeclaration();
this.style.parentRule = this;
};
CSSOM.CSSKeyframeRule.prototype = new CSSOM.CSSRule();
CSSOM.CSSKeyframeRule.prototype.constructor = CSSOM.CSSKeyframeRule;
CSSOM.CSSKeyframeRule.prototype.type = 8;
//FIXME
//CSSOM.CSSKeyframeRule.prototype.insertRule = CSSStyleSheet.prototype.insertRule;
//CSSOM.CSSKeyframeRule.prototype.deleteRule = CSSStyleSheet.prototype.deleteRule;
// http://www.opensource.apple.com/source/WebCore/WebCore-955.66.1/css/WebKitCSSKeyframeRule.cpp
Object.defineProperty(CSSOM.CSSKeyframeRule.prototype, "cssText", {
get: function() {
return this.keyText + " {" + this.style.cssText + "} ";
}
});
//.CommonJS
exports.CSSKeyframeRule = CSSOM.CSSKeyframeRule;
///CommonJS

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//.CommonJS
var CSSOM = {
CSSRule: require("./CSSRule").CSSRule
};
///CommonJS
/**
* @constructor
* @see http://www.w3.org/TR/css3-animations/#DOM-CSSKeyframesRule
*/
CSSOM.CSSKeyframesRule = function CSSKeyframesRule() {
CSSOM.CSSRule.call(this);
this.name = '';
this.cssRules = [];
};
CSSOM.CSSKeyframesRule.prototype = new CSSOM.CSSRule();
CSSOM.CSSKeyframesRule.prototype.constructor = CSSOM.CSSKeyframesRule;
CSSOM.CSSKeyframesRule.prototype.type = 7;
//FIXME
//CSSOM.CSSKeyframesRule.prototype.insertRule = CSSStyleSheet.prototype.insertRule;
//CSSOM.CSSKeyframesRule.prototype.deleteRule = CSSStyleSheet.prototype.deleteRule;
// http://www.opensource.apple.com/source/WebCore/WebCore-955.66.1/css/WebKitCSSKeyframesRule.cpp
Object.defineProperty(CSSOM.CSSKeyframesRule.prototype, "cssText", {
get: function() {
var cssTexts = [];
for (var i=0, length=this.cssRules.length; i < length; i++) {
cssTexts.push(" " + this.cssRules[i].cssText);
}
return "@" + (this._vendorPrefix || '') + "keyframes " + this.name + " { \n" + cssTexts.join("\n") + "\n}";
}
});
//.CommonJS
exports.CSSKeyframesRule = CSSOM.CSSKeyframesRule;
///CommonJS

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//.CommonJS
var CSSOM = {
CSSRule: require("./CSSRule").CSSRule,
CSSGroupingRule: require("./CSSGroupingRule").CSSGroupingRule,
CSSConditionRule: require("./CSSConditionRule").CSSConditionRule,
MediaList: require("./MediaList").MediaList
};
///CommonJS
/**
* @constructor
* @see http://dev.w3.org/csswg/cssom/#cssmediarule
* @see http://www.w3.org/TR/DOM-Level-2-Style/css.html#CSS-CSSMediaRule
*/
CSSOM.CSSMediaRule = function CSSMediaRule() {
CSSOM.CSSConditionRule.call(this);
this.media = new CSSOM.MediaList();
};
CSSOM.CSSMediaRule.prototype = new CSSOM.CSSConditionRule();
CSSOM.CSSMediaRule.prototype.constructor = CSSOM.CSSMediaRule;
CSSOM.CSSMediaRule.prototype.type = 4;
// https://opensource.apple.com/source/WebCore/WebCore-7611.1.21.161.3/css/CSSMediaRule.cpp
Object.defineProperties(CSSOM.CSSMediaRule.prototype, {
"conditionText": {
get: function() {
return this.media.mediaText;
},
set: function(value) {
this.media.mediaText = value;
},
configurable: true,
enumerable: true
},
"cssText": {
get: function() {
var cssTexts = [];
for (var i=0, length=this.cssRules.length; i < length; i++) {
cssTexts.push(this.cssRules[i].cssText);
}
return "@media " + this.media.mediaText + " {" + cssTexts.join("") + "}";
},
configurable: true,
enumerable: true
}
});
//.CommonJS
exports.CSSMediaRule = CSSOM.CSSMediaRule;
///CommonJS

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var CSSOM = {};

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//.CommonJS
var CSSOM = {};
///CommonJS
/**
* @constructor
* @see http://dev.w3.org/csswg/cssom/#the-cssrule-interface
* @see http://www.w3.org/TR/DOM-Level-2-Style/css.html#CSS-CSSRule
*/
CSSOM.CSSRule = function CSSRule() {
this.parentRule = null;
this.parentStyleSheet = null;
};
CSSOM.CSSRule.UNKNOWN_RULE = 0; // obsolete
CSSOM.CSSRule.STYLE_RULE = 1;
CSSOM.CSSRule.CHARSET_RULE = 2; // obsolete
CSSOM.CSSRule.IMPORT_RULE = 3;
CSSOM.CSSRule.MEDIA_RULE = 4;
CSSOM.CSSRule.FONT_FACE_RULE = 5;
CSSOM.CSSRule.PAGE_RULE = 6;
CSSOM.CSSRule.KEYFRAMES_RULE = 7;
CSSOM.CSSRule.KEYFRAME_RULE = 8;
CSSOM.CSSRule.MARGIN_RULE = 9;
CSSOM.CSSRule.NAMESPACE_RULE = 10;
CSSOM.CSSRule.COUNTER_STYLE_RULE = 11;
CSSOM.CSSRule.SUPPORTS_RULE = 12;
CSSOM.CSSRule.DOCUMENT_RULE = 13;
CSSOM.CSSRule.FONT_FEATURE_VALUES_RULE = 14;
CSSOM.CSSRule.VIEWPORT_RULE = 15;
CSSOM.CSSRule.REGION_STYLE_RULE = 16;
CSSOM.CSSRule.prototype = {
constructor: CSSOM.CSSRule
//FIXME
};
//.CommonJS
exports.CSSRule = CSSOM.CSSRule;
///CommonJS

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//.CommonJS
var CSSOM = {};
///CommonJS
/**
* @constructor
* @see http://www.w3.org/TR/DOM-Level-2-Style/css.html#CSS-CSSStyleDeclaration
*/
CSSOM.CSSStyleDeclaration = function CSSStyleDeclaration(){
this.length = 0;
this.parentRule = null;
// NON-STANDARD
this._importants = {};
};
CSSOM.CSSStyleDeclaration.prototype = {
constructor: CSSOM.CSSStyleDeclaration,
/**
*
* @param {string} name
* @see http://www.w3.org/TR/DOM-Level-2-Style/css.html#CSS-CSSStyleDeclaration-getPropertyValue
* @return {string} the value of the property if it has been explicitly set for this declaration block.
* Returns the empty string if the property has not been set.
*/
getPropertyValue: function(name) {
return this[name] || "";
},
/**
*
* @param {string} name
* @param {string} value
* @param {string} [priority=null] "important" or null
* @see http://www.w3.org/TR/DOM-Level-2-Style/css.html#CSS-CSSStyleDeclaration-setProperty
*/
setProperty: function(name, value, priority) {
if (this[name]) {
// Property already exist. Overwrite it.
var index = Array.prototype.indexOf.call(this, name);
if (index < 0) {
this[this.length] = name;
this.length++;
}
} else {
// New property.
this[this.length] = name;
this.length++;
}
this[name] = value + "";
this._importants[name] = priority;
},
/**
*
* @param {string} name
* @see http://www.w3.org/TR/DOM-Level-2-Style/css.html#CSS-CSSStyleDeclaration-removeProperty
* @return {string} the value of the property if it has been explicitly set for this declaration block.
* Returns the empty string if the property has not been set or the property name does not correspond to a known CSS property.
*/
removeProperty: function(name) {
if (!(name in this)) {
return "";
}
var index = Array.prototype.indexOf.call(this, name);
if (index < 0) {
return "";
}
var prevValue = this[name];
this[name] = "";
// That's what WebKit and Opera do
Array.prototype.splice.call(this, index, 1);
// That's what Firefox does
//this[index] = ""
return prevValue;
},
getPropertyCSSValue: function() {
//FIXME
},
/**
*
* @param {String} name
*/
getPropertyPriority: function(name) {
return this._importants[name] || "";
},
/**
* element.style.overflow = "auto"
* element.style.getPropertyShorthand("overflow-x")
* -> "overflow"
*/
getPropertyShorthand: function() {
//FIXME
},
isPropertyImplicit: function() {
//FIXME
},
// Doesn't work in IE < 9
get cssText(){
var properties = [];
for (var i=0, length=this.length; i < length; ++i) {
var name = this[i];
var value = this.getPropertyValue(name);
var priority = this.getPropertyPriority(name);
if (priority) {
priority = " !" + priority;
}
properties[i] = name + ": " + value + priority + ";";
}
return properties.join(" ");
},
set cssText(text){
var i, name;
for (i = this.length; i--;) {
name = this[i];
this[name] = "";
}
Array.prototype.splice.call(this, 0, this.length);
this._importants = {};
var dummyRule = CSSOM.parse('#bogus{' + text + '}').cssRules[0].style;
var length = dummyRule.length;
for (i = 0; i < length; ++i) {
name = dummyRule[i];
this.setProperty(dummyRule[i], dummyRule.getPropertyValue(name), dummyRule.getPropertyPriority(name));
}
}
};
//.CommonJS
exports.CSSStyleDeclaration = CSSOM.CSSStyleDeclaration;
CSSOM.parse = require('./parse').parse; // Cannot be included sooner due to the mutual dependency between parse.js and CSSStyleDeclaration.js
///CommonJS

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//.CommonJS
var CSSOM = {
CSSStyleDeclaration: require("./CSSStyleDeclaration").CSSStyleDeclaration,
CSSRule: require("./CSSRule").CSSRule
};
///CommonJS
/**
* @constructor
* @see http://dev.w3.org/csswg/cssom/#cssstylerule
* @see http://www.w3.org/TR/DOM-Level-2-Style/css.html#CSS-CSSStyleRule
*/
CSSOM.CSSStyleRule = function CSSStyleRule() {
CSSOM.CSSRule.call(this);
this.selectorText = "";
this.style = new CSSOM.CSSStyleDeclaration();
this.style.parentRule = this;
};
CSSOM.CSSStyleRule.prototype = new CSSOM.CSSRule();
CSSOM.CSSStyleRule.prototype.constructor = CSSOM.CSSStyleRule;
CSSOM.CSSStyleRule.prototype.type = 1;
Object.defineProperty(CSSOM.CSSStyleRule.prototype, "cssText", {
get: function() {
var text;
if (this.selectorText) {
text = this.selectorText + " {" + this.style.cssText + "}";
} else {
text = "";
}
return text;
},
set: function(cssText) {
var rule = CSSOM.CSSStyleRule.parse(cssText);
this.style = rule.style;
this.selectorText = rule.selectorText;
}
});
/**
* NON-STANDARD
* lightweight version of parse.js.
* @param {string} ruleText
* @return CSSStyleRule
*/
CSSOM.CSSStyleRule.parse = function(ruleText) {
var i = 0;
var state = "selector";
var index;
var j = i;
var buffer = "";
var SIGNIFICANT_WHITESPACE = {
"selector": true,
"value": true
};
var styleRule = new CSSOM.CSSStyleRule();
var name, priority="";
for (var character; (character = ruleText.charAt(i)); i++) {
switch (character) {
case " ":
case "\t":
case "\r":
case "\n":
case "\f":
if (SIGNIFICANT_WHITESPACE[state]) {
// Squash 2 or more white-spaces in the row into 1
switch (ruleText.charAt(i - 1)) {
case " ":
case "\t":
case "\r":
case "\n":
case "\f":
break;
default:
buffer += " ";
break;
}
}
break;
// String
case '"':
j = i + 1;
index = ruleText.indexOf('"', j) + 1;
if (!index) {
throw '" is missing';
}
buffer += ruleText.slice(i, index);
i = index - 1;
break;
case "'":
j = i + 1;
index = ruleText.indexOf("'", j) + 1;
if (!index) {
throw "' is missing";
}
buffer += ruleText.slice(i, index);
i = index - 1;
break;
// Comment
case "/":
if (ruleText.charAt(i + 1) === "*") {
i += 2;
index = ruleText.indexOf("*/", i);
if (index === -1) {
throw new SyntaxError("Missing */");
} else {
i = index + 1;
}
} else {
buffer += character;
}
break;
case "{":
if (state === "selector") {
styleRule.selectorText = buffer.trim();
buffer = "";
state = "name";
}
break;
case ":":
if (state === "name") {
name = buffer.trim();
buffer = "";
state = "value";
} else {
buffer += character;
}
break;
case "!":
if (state === "value" && ruleText.indexOf("!important", i) === i) {
priority = "important";
i += "important".length;
} else {
buffer += character;
}
break;
case ";":
if (state === "value") {
styleRule.style.setProperty(name, buffer.trim(), priority);
priority = "";
buffer = "";
state = "name";
} else {
buffer += character;
}
break;
case "}":
if (state === "value") {
styleRule.style.setProperty(name, buffer.trim(), priority);
priority = "";
buffer = "";
} else if (state === "name") {
break;
} else {
buffer += character;
}
state = "selector";
break;
default:
buffer += character;
break;
}
}
return styleRule;
};
//.CommonJS
exports.CSSStyleRule = CSSOM.CSSStyleRule;
///CommonJS

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//.CommonJS
var CSSOM = {
StyleSheet: require("./StyleSheet").StyleSheet,
CSSStyleRule: require("./CSSStyleRule").CSSStyleRule
};
///CommonJS
/**
* @constructor
* @see http://www.w3.org/TR/DOM-Level-2-Style/css.html#CSS-CSSStyleSheet
*/
CSSOM.CSSStyleSheet = function CSSStyleSheet() {
CSSOM.StyleSheet.call(this);
this.cssRules = [];
};
CSSOM.CSSStyleSheet.prototype = new CSSOM.StyleSheet();
CSSOM.CSSStyleSheet.prototype.constructor = CSSOM.CSSStyleSheet;
/**
* Used to insert a new rule into the style sheet. The new rule now becomes part of the cascade.
*
* sheet = new Sheet("body {margin: 0}")
* sheet.toString()
* -> "body{margin:0;}"
* sheet.insertRule("img {border: none}", 0)
* -> 0
* sheet.toString()
* -> "img{border:none;}body{margin:0;}"
*
* @param {string} rule
* @param {number} index
* @see http://www.w3.org/TR/DOM-Level-2-Style/css.html#CSS-CSSStyleSheet-insertRule
* @return {number} The index within the style sheet's rule collection of the newly inserted rule.
*/
CSSOM.CSSStyleSheet.prototype.insertRule = function(rule, index) {
if (index < 0 || index > this.cssRules.length) {
throw new RangeError("INDEX_SIZE_ERR");
}
var cssRule = CSSOM.parse(rule).cssRules[0];
cssRule.parentStyleSheet = this;
this.cssRules.splice(index, 0, cssRule);
return index;
};
/**
* Used to delete a rule from the style sheet.
*
* sheet = new Sheet("img{border:none} body{margin:0}")
* sheet.toString()
* -> "img{border:none;}body{margin:0;}"
* sheet.deleteRule(0)
* sheet.toString()
* -> "body{margin:0;}"
*
* @param {number} index within the style sheet's rule list of the rule to remove.
* @see http://www.w3.org/TR/DOM-Level-2-Style/css.html#CSS-CSSStyleSheet-deleteRule
*/
CSSOM.CSSStyleSheet.prototype.deleteRule = function(index) {
if (index < 0 || index >= this.cssRules.length) {
throw new RangeError("INDEX_SIZE_ERR");
}
this.cssRules.splice(index, 1);
};
/**
* NON-STANDARD
* @return {string} serialize stylesheet
*/
CSSOM.CSSStyleSheet.prototype.toString = function() {
var result = "";
var rules = this.cssRules;
for (var i=0; i<rules.length; i++) {
result += rules[i].cssText + "\n";
}
return result;
};
//.CommonJS
exports.CSSStyleSheet = CSSOM.CSSStyleSheet;
CSSOM.parse = require('./parse').parse; // Cannot be included sooner due to the mutual dependency between parse.js and CSSStyleSheet.js
///CommonJS

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//.CommonJS
var CSSOM = {
CSSRule: require("./CSSRule").CSSRule,
CSSGroupingRule: require("./CSSGroupingRule").CSSGroupingRule,
CSSConditionRule: require("./CSSConditionRule").CSSConditionRule
};
///CommonJS
/**
* @constructor
* @see https://drafts.csswg.org/css-conditional-3/#the-csssupportsrule-interface
*/
CSSOM.CSSSupportsRule = function CSSSupportsRule() {
CSSOM.CSSConditionRule.call(this);
};
CSSOM.CSSSupportsRule.prototype = new CSSOM.CSSConditionRule();
CSSOM.CSSSupportsRule.prototype.constructor = CSSOM.CSSSupportsRule;
CSSOM.CSSSupportsRule.prototype.type = 12;
Object.defineProperty(CSSOM.CSSSupportsRule.prototype, "cssText", {
get: function() {
var cssTexts = [];
for (var i = 0, length = this.cssRules.length; i < length; i++) {
cssTexts.push(this.cssRules[i].cssText);
}
return "@supports " + this.conditionText + " {" + cssTexts.join("") + "}";
}
});
//.CommonJS
exports.CSSSupportsRule = CSSOM.CSSSupportsRule;
///CommonJS

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node_modules/cssom/lib/CSSValue.js generated vendored Normal file
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//.CommonJS
var CSSOM = {};
///CommonJS
/**
* @constructor
* @see http://www.w3.org/TR/DOM-Level-2-Style/css.html#CSS-CSSValue
*
* TODO: add if needed
*/
CSSOM.CSSValue = function CSSValue() {
};
CSSOM.CSSValue.prototype = {
constructor: CSSOM.CSSValue,
// @see: http://www.w3.org/TR/DOM-Level-2-Style/css.html#CSS-CSSValue
set cssText(text) {
var name = this._getConstructorName();
throw new Error('DOMException: property "cssText" of "' + name + '" is readonly and can not be replaced with "' + text + '"!');
},
get cssText() {
var name = this._getConstructorName();
throw new Error('getter "cssText" of "' + name + '" is not implemented!');
},
_getConstructorName: function() {
var s = this.constructor.toString(),
c = s.match(/function\s([^\(]+)/),
name = c[1];
return name;
}
};
//.CommonJS
exports.CSSValue = CSSOM.CSSValue;
///CommonJS

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//.CommonJS
var CSSOM = {
CSSValue: require('./CSSValue').CSSValue
};
///CommonJS
/**
* @constructor
* @see http://msdn.microsoft.com/en-us/library/ms537634(v=vs.85).aspx
*
*/
CSSOM.CSSValueExpression = function CSSValueExpression(token, idx) {
this._token = token;
this._idx = idx;
};
CSSOM.CSSValueExpression.prototype = new CSSOM.CSSValue();
CSSOM.CSSValueExpression.prototype.constructor = CSSOM.CSSValueExpression;
/**
* parse css expression() value
*
* @return {Object}
* - error:
* or
* - idx:
* - expression:
*
* Example:
*
* .selector {
* zoom: expression(documentElement.clientWidth > 1000 ? '1000px' : 'auto');
* }
*/
CSSOM.CSSValueExpression.prototype.parse = function() {
var token = this._token,
idx = this._idx;
var character = '',
expression = '',
error = '',
info,
paren = [];
for (; ; ++idx) {
character = token.charAt(idx);
// end of token
if (character === '') {
error = 'css expression error: unfinished expression!';
break;
}
switch(character) {
case '(':
paren.push(character);
expression += character;
break;
case ')':
paren.pop(character);
expression += character;
break;
case '/':
if ((info = this._parseJSComment(token, idx))) { // comment?
if (info.error) {
error = 'css expression error: unfinished comment in expression!';
} else {
idx = info.idx;
// ignore the comment
}
} else if ((info = this._parseJSRexExp(token, idx))) { // regexp
idx = info.idx;
expression += info.text;
} else { // other
expression += character;
}
break;
case "'":
case '"':
info = this._parseJSString(token, idx, character);
if (info) { // string
idx = info.idx;
expression += info.text;
} else {
expression += character;
}
break;
default:
expression += character;
break;
}
if (error) {
break;
}
// end of expression
if (paren.length === 0) {
break;
}
}
var ret;
if (error) {
ret = {
error: error
};
} else {
ret = {
idx: idx,
expression: expression
};
}
return ret;
};
/**
*
* @return {Object|false}
* - idx:
* - text:
* or
* - error:
* or
* false
*
*/
CSSOM.CSSValueExpression.prototype._parseJSComment = function(token, idx) {
var nextChar = token.charAt(idx + 1),
text;
if (nextChar === '/' || nextChar === '*') {
var startIdx = idx,
endIdx,
commentEndChar;
if (nextChar === '/') { // line comment
commentEndChar = '\n';
} else if (nextChar === '*') { // block comment
commentEndChar = '*/';
}
endIdx = token.indexOf(commentEndChar, startIdx + 1 + 1);
if (endIdx !== -1) {
endIdx = endIdx + commentEndChar.length - 1;
text = token.substring(idx, endIdx + 1);
return {
idx: endIdx,
text: text
};
} else {
var error = 'css expression error: unfinished comment in expression!';
return {
error: error
};
}
} else {
return false;
}
};
/**
*
* @return {Object|false}
* - idx:
* - text:
* or
* false
*
*/
CSSOM.CSSValueExpression.prototype._parseJSString = function(token, idx, sep) {
var endIdx = this._findMatchedIdx(token, idx, sep),
text;
if (endIdx === -1) {
return false;
} else {
text = token.substring(idx, endIdx + sep.length);
return {
idx: endIdx,
text: text
};
}
};
/**
* parse regexp in css expression
*
* @return {Object|false}
* - idx:
* - regExp:
* or
* false
*/
/*
all legal RegExp
/a/
(/a/)
[/a/]
[12, /a/]
!/a/
+/a/
-/a/
* /a/
/ /a/
%/a/
===/a/
!==/a/
==/a/
!=/a/
>/a/
>=/a/
</a/
<=/a/
&/a/
|/a/
^/a/
~/a/
<</a/
>>/a/
>>>/a/
&&/a/
||/a/
?/a/
=/a/
,/a/
delete /a/
in /a/
instanceof /a/
new /a/
typeof /a/
void /a/
*/
CSSOM.CSSValueExpression.prototype._parseJSRexExp = function(token, idx) {
var before = token.substring(0, idx).replace(/\s+$/, ""),
legalRegx = [
/^$/,
/\($/,
/\[$/,
/\!$/,
/\+$/,
/\-$/,
/\*$/,
/\/\s+/,
/\%$/,
/\=$/,
/\>$/,
/<$/,
/\&$/,
/\|$/,
/\^$/,
/\~$/,
/\?$/,
/\,$/,
/delete$/,
/in$/,
/instanceof$/,
/new$/,
/typeof$/,
/void$/
];
var isLegal = legalRegx.some(function(reg) {
return reg.test(before);
});
if (!isLegal) {
return false;
} else {
var sep = '/';
// same logic as string
return this._parseJSString(token, idx, sep);
}
};
/**
*
* find next sep(same line) index in `token`
*
* @return {Number}
*
*/
CSSOM.CSSValueExpression.prototype._findMatchedIdx = function(token, idx, sep) {
var startIdx = idx,
endIdx;
var NOT_FOUND = -1;
while(true) {
endIdx = token.indexOf(sep, startIdx + 1);
if (endIdx === -1) { // not found
endIdx = NOT_FOUND;
break;
} else {
var text = token.substring(idx + 1, endIdx),
matched = text.match(/\\+$/);
if (!matched || matched[0] % 2 === 0) { // not escaped
break;
} else {
startIdx = endIdx;
}
}
}
// boundary must be in the same line(js sting or regexp)
var nextNewLineIdx = token.indexOf('\n', idx + 1);
if (nextNewLineIdx < endIdx) {
endIdx = NOT_FOUND;
}
return endIdx;
};
//.CommonJS
exports.CSSValueExpression = CSSOM.CSSValueExpression;
///CommonJS

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