SillyTavern/public/scripts/popup.js

673 lines
30 KiB
JavaScript

import { shouldSendOnEnter } from './RossAscends-mods.js';
import { power_user } from './power-user.js';
import { removeFromArray, runAfterAnimation, uuidv4 } from './utils.js';
/** @readonly */
/** @enum {Number} */
export const POPUP_TYPE = {
/** Main popup type. Containing any content displayed, with buttons below. Can also contain additional input controls. */
TEXT: 1,
/** Popup mainly made to confirm something, answering with a simple Yes/No or similar. Focus on the button controls. */
CONFIRM: 2,
/** Popup who's main focus is the input text field, which is displayed here. Can contain additional content above. Return value for this is the input string. */
INPUT: 3,
/** Popup without any button controls. Used to simply display content, with a small X in the corner. */
DISPLAY: 4,
/** Popup that displays an image to crop. Returns a cropped image in result. */
CROP: 5,
};
/** @readonly */
/** @enum {number?} */
export const POPUP_RESULT = {
AFFIRMATIVE: 1,
NEGATIVE: 0,
CANCELLED: null,
};
/**
* @typedef {object} PopupOptions
* @property {string|boolean?} [okButton=null] - Custom text for the OK button, or `true` to use the default (If set, the button will always be displayed, no matter the type of popup)
* @property {string|boolean?} [cancelButton=null] - Custom text for the Cancel button, or `true` to use the default (If set, the button will always be displayed, no matter the type of popup)
* @property {number?} [rows=1] - The number of rows for the input field
* @property {boolean?} [wide=false] - Whether to display the popup in wide mode (wide screen, 1/1 aspect ratio)
* @property {boolean?} [wider=false] - Whether to display the popup in wider mode (just wider, no height scaling)
* @property {boolean?} [large=false] - Whether to display the popup in large mode (90% of screen)
* @property {boolean?} [transparent=false] - Whether to display the popup in transparent mode (no background, border, shadow or anything, only its content)
* @property {boolean?} [allowHorizontalScrolling=false] - Whether to allow horizontal scrolling in the popup
* @property {boolean?} [allowVerticalScrolling=false] - Whether to allow vertical scrolling in the popup
* @property {'slow'|'fast'|'none'?} [animation='slow'] - Animation speed for the popup (opening, closing, ...)
* @property {POPUP_RESULT|number?} [defaultResult=POPUP_RESULT.AFFIRMATIVE] - The default result of this popup when Enter is pressed. Can be changed from `POPUP_RESULT.AFFIRMATIVE`.
* @property {CustomPopupButton[]|string[]?} [customButtons=null] - Custom buttons to add to the popup. If only strings are provided, the buttons will be added with default options, and their result will be in order from `2` onward.
* @property {CustomPopupInput[]?} [customInputs=null] - Custom inputs to add to the popup. The display below the content and the input box, one by one.
* @property {(popup: Popup) => boolean?} [onClosing=null] - Handler called before the popup closes, return `false` to cancel the close
* @property {(popup: Popup) => void?} [onClose=null] - Handler called after the popup closes, but before the DOM is cleaned up
* @property {number?} [cropAspect=null] - Aspect ratio for the crop popup
* @property {string?} [cropImage=null] - Image URL to display in the crop popup
*/
/**
* @typedef {object} CustomPopupButton
* @property {string} text - The text of the button
* @property {POPUP_RESULT|number?} [result] - The result of the button - can also be a custom result value to make be able to find out that this button was clicked. If no result is specified, this button will **not** close the popup.
* @property {string[]|string?} [classes] - Optional custom CSS classes applied to the button
* @property {()=>void?} [action] - Optional action to perform when the button is clicked
* @property {boolean?} [appendAtEnd] - Whether to append the button to the end of the popup - by default it will be prepended
*/
/**
* @typedef {object} CustomPopupInput
* @property {string} id - The id for the html element
* @property {string} label - The label text for the input
* @property {string?} [tooltip=null] - Optional tooltip icon displayed behind the label
* @property {boolean?} [defaultState=false] - The default state when opening the popup (false if not set)
*/
/**
* @typedef {object} ShowPopupHelper
* Local implementation of the helper functionality to show several popups.
*
* Should be called via `Popup.show.xxxx()`.
*/
const showPopupHelper = {
/**
* Asynchronously displays an input popup with the given header and text, and returns the user's input.
*
* @param {string} header - The header text for the popup.
* @param {string} text - The main text for the popup.
* @param {string} [defaultValue=''] - The default value for the input field.
* @param {PopupOptions} [popupOptions={}] - Options for the popup.
* @return {Promise<string?>} A Promise that resolves with the user's input.
*/
input: async (header, text, defaultValue = '', popupOptions = {}) => {
const content = PopupUtils.BuildTextWithHeader(header, text);
const popup = new Popup(content, POPUP_TYPE.INPUT, defaultValue, popupOptions);
const value = await popup.show();
return value ? String(value) : null;
},
/**
* Asynchronously displays a confirmation popup with the given header and text, returning the clicked result button value.
*
* @param {string?} header - The header text for the popup.
* @param {string?} text - The main text for the popup.
* @param {PopupOptions} [popupOptions={}] - Options for the popup.
* @return {Promise<POPUP_RESULT>} A Promise that resolves with the result of the user's interaction.
*/
confirm: async (header, text, popupOptions = {}) => {
const content = PopupUtils.BuildTextWithHeader(header, text);
const popup = new Popup(content, POPUP_TYPE.CONFIRM, null, popupOptions);
const result = await popup.show();
if (typeof result === 'string' || typeof result === 'boolean') throw new Error(`Invalid popup result. CONFIRM popups only support numbers, or null. Result: ${result}`);
return result;
},
};
export class Popup {
/** @readonly @type {POPUP_TYPE} */ type;
/** @readonly @type {string} */ id;
/** @readonly @type {HTMLDialogElement} */ dlg;
/** @readonly @type {HTMLDivElement} */ body;
/** @readonly @type {HTMLDivElement} */ content;
/** @readonly @type {HTMLTextAreaElement} */ mainInput;
/** @readonly @type {HTMLDivElement} */ inputControls;
/** @readonly @type {HTMLDivElement} */ buttonControls;
/** @readonly @type {HTMLDivElement} */ okButton;
/** @readonly @type {HTMLDivElement} */ cancelButton;
/** @readonly @type {HTMLDivElement} */ closeButton;
/** @readonly @type {HTMLDivElement} */ cropWrap;
/** @readonly @type {HTMLImageElement} */ cropImage;
/** @readonly @type {POPUP_RESULT|number?} */ defaultResult;
/** @readonly @type {CustomPopupButton[]|string[]?} */ customButtons;
/** @readonly @type {CustomPopupInput[]} */ customInputs;
/** @type {(popup: Popup) => boolean?} */ onClosing;
/** @type {(popup: Popup) => void?} */ onClose;
/** @type {POPUP_RESULT|number} */ result;
/** @type {any} */ value;
/** @type {Map<string,boolean>?} */ inputResults;
/** @type {any} */ cropData;
/** @type {HTMLElement} */ lastFocus;
/** @type {Promise<any>} */ #promise;
/** @type {(result: any) => any} */ #resolver;
/** @type {boolean} */ #isClosingPrevented;
/**
* Constructs a new Popup object with the given text content, type, inputValue, and options
*
* @param {JQuery<HTMLElement>|string|Element} content - Text content to display in the popup
* @param {POPUP_TYPE} type - The type of the popup
* @param {string} [inputValue=''] - The initial value of the input field
* @param {PopupOptions} [options={}] - Additional options for the popup
*/
constructor(content, type, inputValue = '', { okButton = null, cancelButton = null, rows = 1, wide = false, wider = false, large = false, transparent = false, allowHorizontalScrolling = false, allowVerticalScrolling = false, animation = 'fast', defaultResult = POPUP_RESULT.AFFIRMATIVE, customButtons = null, customInputs = null, onClosing = null, onClose = null, cropAspect = null, cropImage = null } = {}) {
Popup.util.popups.push(this);
// Make this popup uniquely identifiable
this.id = uuidv4();
this.type = type;
// Utilize event handlers being passed in
this.onClosing = onClosing;
this.onClose = onClose;
/**@type {HTMLTemplateElement}*/
const template = document.querySelector('#popup_template');
// @ts-ignore
this.dlg = template.content.cloneNode(true).querySelector('.popup');
this.body = this.dlg.querySelector('.popup-body');
this.content = this.dlg.querySelector('.popup-content');
this.mainInput = this.dlg.querySelector('.popup-input');
this.inputControls = this.dlg.querySelector('.popup-inputs');
this.buttonControls = this.dlg.querySelector('.popup-controls');
this.okButton = this.dlg.querySelector('.popup-button-ok');
this.cancelButton = this.dlg.querySelector('.popup-button-cancel');
this.closeButton = this.dlg.querySelector('.popup-button-close');
this.cropWrap = this.dlg.querySelector('.popup-crop-wrap');
this.cropImage = this.dlg.querySelector('.popup-crop-image');
this.dlg.setAttribute('data-id', this.id);
if (wide) this.dlg.classList.add('wide_dialogue_popup');
if (wider) this.dlg.classList.add('wider_dialogue_popup');
if (large) this.dlg.classList.add('large_dialogue_popup');
if (transparent) this.dlg.classList.add('transparent_dialogue_popup');
if (allowHorizontalScrolling) this.dlg.classList.add('horizontal_scrolling_dialogue_popup');
if (allowVerticalScrolling) this.dlg.classList.add('vertical_scrolling_dialogue_popup');
if (animation) this.dlg.classList.add('popup--animation-' + animation);
// If custom button captions are provided, we set them beforehand
this.okButton.textContent = typeof okButton === 'string' ? okButton : 'OK';
this.okButton.dataset.i18n = this.okButton.textContent;
this.cancelButton.textContent = typeof cancelButton === 'string' ? cancelButton : template.getAttribute('popup-button-cancel');
this.cancelButton.dataset.i18n = this.cancelButton.textContent;
this.defaultResult = defaultResult;
this.customButtons = customButtons;
this.customButtons?.forEach((x, index) => {
/** @type {CustomPopupButton} */
const button = typeof x === 'string' ? { text: x, result: index + 2 } : x;
const buttonElement = document.createElement('div');
buttonElement.classList.add('menu_button', 'popup-button-custom', 'result-control');
buttonElement.classList.add(...(button.classes ?? []));
buttonElement.dataset.result = String(button.result); // This is expected to also write 'null' or 'staging', to indicate cancel and no action respectively
buttonElement.textContent = button.text;
buttonElement.dataset.i18n = buttonElement.textContent;
buttonElement.tabIndex = 0;
if (button.appendAtEnd) {
this.buttonControls.appendChild(buttonElement);
} else {
this.buttonControls.insertBefore(buttonElement, this.okButton);
}
if (typeof button.action === 'function') {
buttonElement.addEventListener('click', button.action);
}
});
this.customInputs = customInputs;
this.customInputs?.forEach(input => {
if (!input.id || !(typeof input.id === 'string')) {
console.warn('Given custom input does not have a valid id set');
return;
}
const label = document.createElement('label');
label.classList.add('checkbox_label', 'justifyCenter');
label.setAttribute('for', input.id);
const inputElement = document.createElement('input');
inputElement.type = 'checkbox';
inputElement.id = input.id;
inputElement.checked = input.defaultState ?? false;
label.appendChild(inputElement);
const labelText = document.createElement('span');
labelText.innerText = input.label;
labelText.dataset.i18n = input.label;
label.appendChild(labelText);
if (input.tooltip) {
const tooltip = document.createElement('div');
tooltip.classList.add('fa-solid', 'fa-circle-info', 'opacity50p');
tooltip.title = input.tooltip;
tooltip.dataset.i18n = '[title]' + input.tooltip;
label.appendChild(tooltip);
}
this.inputControls.appendChild(label);
});
// Set the default button class
const defaultButton = this.buttonControls.querySelector(`[data-result="${this.defaultResult}"]`);
if (defaultButton) defaultButton.classList.add('menu_button_default');
// Styling differences depending on the popup type
// General styling for all types first, that might be overriden for specific types below
this.mainInput.style.display = 'none';
this.inputControls.style.display = customInputs ? 'block' : 'none';
this.closeButton.style.display = 'none';
this.cropWrap.style.display = 'none';
switch (type) {
case POPUP_TYPE.TEXT: {
if (!cancelButton) this.cancelButton.style.display = 'none';
break;
}
case POPUP_TYPE.CONFIRM: {
if (!okButton) this.okButton.textContent = template.getAttribute('popup-button-yes');
if (!cancelButton) this.cancelButton.textContent = template.getAttribute('popup-button-no');
break;
}
case POPUP_TYPE.INPUT: {
this.mainInput.style.display = 'block';
if (!okButton) this.okButton.textContent = template.getAttribute('popup-button-save');
break;
}
case POPUP_TYPE.DISPLAY: {
this.buttonControls.style.display = 'none';
this.closeButton.style.display = 'block';
break;
}
case POPUP_TYPE.CROP: {
this.cropWrap.style.display = 'block';
this.cropImage.src = cropImage;
if (!okButton) this.okButton.textContent = template.getAttribute('popup-button-crop');
$(this.cropImage).cropper({
aspectRatio: cropAspect ?? 2 / 3,
autoCropArea: 1,
viewMode: 2,
rotatable: false,
crop: (event) => {
this.cropData = event.detail;
this.cropData.want_resize = !power_user.never_resize_avatars;
},
});
break;
}
default: {
console.warn('Unknown popup type.', type);
break;
}
}
this.mainInput.value = inputValue;
this.mainInput.rows = rows ?? 1;
this.content.innerHTML = '';
if (content instanceof jQuery) {
$(this.content).append(content);
} else if (content instanceof HTMLElement) {
this.content.append(content);
} else if (typeof content == 'string') {
this.content.innerHTML = content;
} else {
console.warn('Unknown popup text type. Should be jQuery, HTMLElement or string.', content);
}
// Already prepare the auto-focus control by adding the "autofocus" attribute, this should be respected by showModal()
this.setAutoFocus({ applyAutoFocus: true });
// Set focus event that remembers the focused element
this.dlg.addEventListener('focusin', (evt) => { if (evt.target instanceof HTMLElement && evt.target != this.dlg) this.lastFocus = evt.target; });
// Bind event listeners for all result controls to their defined event type
this.dlg.querySelectorAll('[data-result]').forEach(resultControl => {
if (!(resultControl instanceof HTMLElement)) return;
// If no value was set, we exit out and don't bind an action
if (String(resultControl.dataset.result) === String(undefined)) return;
// Make sure that both `POPUP_RESULT` numbers and also `null` as 'cancelled' are supported
const result = String(resultControl.dataset.result) === String(null) ? null
: Number(resultControl.dataset.result);
if (result !== null && isNaN(result)) throw new Error('Invalid result control. Result must be a number. ' + resultControl.dataset.result);
const type = resultControl.dataset.resultEvent || 'click';
resultControl.addEventListener(type, async () => await this.complete(result));
});
// Bind dialog listeners manually, so we can be sure context is preserved
const cancelListener = async (evt) => {
evt.preventDefault();
evt.stopPropagation();
await this.complete(POPUP_RESULT.CANCELLED);
};
this.dlg.addEventListener('cancel', cancelListener.bind(this));
// Don't ask me why this is needed. I don't get it. But we have to keep it.
// We make sure that the modal on its own doesn't hide. Dunno why, if onClosing is triggered multiple times through the cancel event, and stopped,
// it seems to just call 'close' on the dialog even if the 'cancel' event was prevented.
// So here we just say that close should not happen if it was prevented.
const closeListener = async (evt) => {
if (this.#isClosingPrevented) {
evt.preventDefault();
evt.stopPropagation();
this.dlg.showModal();
}
};
this.dlg.addEventListener('close', closeListener.bind(this));
const keyListener = async (evt) => {
switch (evt.key) {
case 'Enter': {
// CTRL+Enter counts as a closing action, but all other modifiers (ALT, SHIFT) should not trigger this
if (evt.altKey || evt.shiftKey)
return;
// Check if we are the currently active popup
if (this.dlg != document.activeElement?.closest('.popup'))
return;
// Check if the current focus is a result control. Only should we apply the complete action
const resultControl = document.activeElement?.closest('.result-control');
if (!resultControl)
return;
// Check if we are inside an input type text or a textarea field and send on enter is disabled
const textarea = document.activeElement?.closest('textarea');
if (textarea instanceof HTMLTextAreaElement && !shouldSendOnEnter())
return;
const input = document.activeElement?.closest('input[type="text"]');
if (input instanceof HTMLInputElement && !shouldSendOnEnter())
return;
evt.preventDefault();
evt.stopPropagation();
const result = Number(document.activeElement.getAttribute('data-result') ?? this.defaultResult);
// Call complete on the popup. Make sure that we handle `onClosing` cancels correctly and don't remove the listener then.
await this.complete(result);
break;
}
}
};
this.dlg.addEventListener('keydown', keyListener.bind(this));
}
/**
* Asynchronously shows the popup element by appending it to the document body,
* setting its display to 'block' and focusing on the input if the popup type is INPUT.
*
* @returns {Promise<string|number|boolean?>} A promise that resolves with the value of the popup when it is completed.
*/
async show() {
document.body.append(this.dlg);
// Run opening animation
this.dlg.setAttribute('opening', '');
this.dlg.showModal();
// We need to fix the toastr to be present inside this dialog
fixToastrForDialogs();
runAfterAnimation(this.dlg, () => {
this.dlg.removeAttribute('opening');
});
this.#promise = new Promise((resolve) => {
this.#resolver = resolve;
});
return this.#promise;
}
setAutoFocus({ applyAutoFocus = false } = {}) {
/** @type {HTMLElement} */
let control;
// Try to find if we have an autofocus control already present
control = this.dlg.querySelector('[autofocus]');
// If not, find the default control for this popup type
if (!control) {
switch (this.type) {
case POPUP_TYPE.INPUT: {
control = this.mainInput;
break;
}
default:
// Select default button
control = this.buttonControls.querySelector(`[data-result="${this.defaultResult}"]`);
break;
}
}
if (applyAutoFocus) {
control.setAttribute('autofocus', '');
// Manually enable tabindex too, as this might only be applied by the interactable functionality in the background, but too late for HTML autofocus
// interactable only gets applied when inserted into the DOM
control.tabIndex = 0;
} else {
control.focus();
}
}
/**
* Completes the popup and sets its result and value
*
* The completion handling will make the popup return the result to the original show promise.
*
* There will be two different types of result values:
* - popup with `POPUP_TYPE.INPUT` will return the input value - or `false` on negative and `null` on cancelled
* - All other will return the result value as provided as `POPUP_RESULT` or a custom number value
*
* <b>IMPORTANT:</b> If the popup closing was cancelled via the `onClosing` handler, the return value will be `Promise<undefined>`.
*
* @param {POPUP_RESULT|number} result - The result of the popup (either an existing `POPUP_RESULT` or a custom result value)
*
* @returns {Promise<string|number|boolean|undefined?>} A promise that resolves with the value of the popup when it is completed. <b>Returns `undefined` if the closing action was cancelled.</b>
*/
async complete(result) {
// In all cases besides INPUT the popup value should be the result
/** @type {POPUP_RESULT|number|boolean|string?} */
let value = result;
// Input type have special results, so the input can be accessed directly without the need to save the popup and access both result and value
if (this.type === POPUP_TYPE.INPUT) {
if (result >= POPUP_RESULT.AFFIRMATIVE) value = this.mainInput.value;
else if (result === POPUP_RESULT.NEGATIVE) value = false;
else if (result === POPUP_RESULT.CANCELLED) value = null;
else value = false; // Might a custom negative value?
}
// Cropped image should be returned as a data URL
if (this.type === POPUP_TYPE.CROP) {
value = result >= POPUP_RESULT.AFFIRMATIVE
? $(this.cropImage).data('cropper').getCroppedCanvas().toDataURL('image/jpeg')
: null;
}
if (this.customInputs?.length) {
this.inputResults = new Map(this.customInputs.map(input => {
/** @type {HTMLInputElement} */
const inputControl = this.dlg.querySelector(`#${input.id}`);
return [inputControl.id, inputControl.checked];
}));
}
this.value = value;
this.result = result;
if (this.onClosing) {
const shouldClose = this.onClosing(this);
if (!shouldClose) {
this.#isClosingPrevented = true;
// Set values back if we cancel out of closing the popup
this.value = undefined;
this.result = undefined;
this.inputResults = undefined;
return undefined;
}
}
this.#isClosingPrevented = false;
Popup.util.lastResult = { value, result, inputResults: this.inputResults };
this.#hide();
return this.#promise;
}
/**
* Hides the popup, using the internal resolver to return the value to the original show promise
*/
#hide() {
// We close the dialog, first running the animation
this.dlg.setAttribute('closing', '');
// Once the hiding starts, we need to fix the toastr to the layer below
fixToastrForDialogs();
// After the dialog is actually completely closed, remove it from the DOM
runAfterAnimation(this.dlg, () => {
// Call the close on the dialog
this.dlg.close();
// Run a possible custom handler right before DOM removal
if (this.onClose) {
this.onClose(this);
}
// Remove it from the dom
this.dlg.remove();
// Remove it from the popup references
removeFromArray(Popup.util.popups, this);
// If there is any popup below this one, see if we can set the focus
if (Popup.util.popups.length > 0) {
const activeDialog = document.activeElement?.closest('.popup');
const id = activeDialog?.getAttribute('data-id');
const popup = Popup.util.popups.find(x => x.id == id);
if (popup) {
if (popup.lastFocus) popup.lastFocus.focus();
else popup.setAutoFocus();
}
}
this.#resolver(this.value);
});
}
/**
* Show a popup with any of the given helper methods. Use `await` to make them blocking.
*/
static show = showPopupHelper;
/**
* Utility for popup and popup management.
*
* Contains the list of all currently open popups, and it'll remember the result of the last closed popup.
*/
static util = {
/** @readonly @type {Popup[]} Remember all popups */
popups: [],
/** @type {{value: any, result: POPUP_RESULT|number?, inputResults: Map<string, boolean>?}?} Last popup result */
lastResult: null,
/** @returns {boolean} Checks if any modal popup dialog is open */
isPopupOpen() {
return Popup.util.popups.length > 0;
},
/**
* Returns the topmost modal layer in the document. If there is an open dialog popup,
* it returns the dialog element. Otherwise, it returns the document body.
*
* @return {HTMLElement} The topmost modal layer element
*/
getTopmostModalLayer() {
return getTopmostModalLayer();
},
};
}
class PopupUtils {
/**
* Builds popup content with header and text below
*
* @param {string} header - The header to be added to the text
* @param {string} text - The main text content
*/
static BuildTextWithHeader(header, text) {
if (!header) {
return text;
}
return `<h3>${header}</h3>
${text}`;
}
}
/**
* Displays a blocking popup with a given content and type
*
* @param {JQuery<HTMLElement>|string|Element} content - Content or text to display in the popup
* @param {POPUP_TYPE} type
* @param {string} inputValue - Value to set the input to
* @param {PopupOptions} [popupOptions={}] - Options for the popup
* @returns {Promise<POPUP_RESULT|string|boolean?>} The value for this popup, which can either be the popup retult or the input value if chosen
*/
export function callGenericPopup(content, type, inputValue = '', popupOptions = {}) {
const popup = new Popup(
content,
type,
inputValue,
popupOptions,
);
return popup.show();
}
/**
* Returns the topmost modal layer in the document. If there is an open dialog,
* it returns the dialog element. Otherwise, it returns the document body.
*
* @return {HTMLElement} The topmost modal layer element
*/
export function getTopmostModalLayer() {
const dlg = Array.from(document.querySelectorAll('dialog[open]:not([closing])')).pop();
if (dlg instanceof HTMLElement) return dlg;
return document.body;
}
/**
* Fixes the issue with toastr not displaying on top of the dialog by moving the toastr container inside the dialog or back to the main body
*/
export function fixToastrForDialogs() {
// Hacky way of getting toastr to actually display on top of the popup...
const dlg = Array.from(document.querySelectorAll('dialog[open]:not([closing])')).pop();
let toastContainer = document.getElementById('toast-container');
const isAlreadyPresent = !!toastContainer;
if (!toastContainer) {
toastContainer = document.createElement('div');
toastContainer.setAttribute('id', 'toast-container');
if (toastr.options.positionClass) toastContainer.classList.add(toastr.options.positionClass);
}
// Check if toastr is already a child. If not, we need to move it inside this dialog.
// This is either the existing toastr container or the newly created one.
if (dlg && !dlg.contains(toastContainer)) {
dlg?.appendChild(toastContainer);
return;
}
// Now another case is if we only have one popup and that is currently closing. In that case the toastr container exists,
// but we don't have an open dialog to move it into. It's just inside the existing one that will be gone in milliseconds.
// To prevent new toasts from being showing up in there and then vanish in an instant,
// we move the toastr back to the main body, or delete if its empty
if (!dlg && isAlreadyPresent) {
if (!toastContainer.childNodes.length) {
toastContainer.remove();
} else {
document.body.appendChild(toastContainer);
toastContainer.classList.add('toast-top-center');
}
}
}