add Gutenberg events list block

.eslintrc.json

@@ -3,6 +3,9 @@
     "browser": true,
     "es2020": true
   },
+  "globals": {
+    "MOBILIZON_CONNECTOR": "readonly"
+  },
   "parser": "@babel/eslint-parser",
   "extends": [
     "eslint:recommended",

.github/workflows/test.yml

@@ -24,5 +24,7 @@ jobs:
         uses: actions/setup-node@v2
         with:
           node-version: ${{ matrix.node-version }}
-      - run: npm ci --omit=dev --ignore-scripts
+      - name: Upgrade NPM
+        run: npm install -g npm
+      - run: npm ci --ignore-scripts
       - run: npm run build-prod

package.json

@@ -31,23 +31,23 @@
   },
   "devDependencies": {
     "@babel/core": "7.17.12",
-    "@babel/eslint-parser": "^7.16.5",
+    "@babel/eslint-parser": "7.16.5",
     "@babel/preset-env": "7.17.12",
-    "@babel/preset-react": "^7.16.5",
+    "@babel/preset-react": "7.16.5",
     "@wordpress/eslint-plugin": "12.4.0",
     "ava": "4.2.0",
     "babel-loader": "8.2.5",
+    "browser-env": "3.3.0",
     "c8": "7.11.3",
     "copy-webpack-plugin": "11.0.0",
     "eslint": "8.15.0",
     "eslint-plugin-ava": "13.2.0",
-    "eslint-plugin-jsx": "^0.1.0",
-    "eslint-plugin-react": "^7.27.1",
+    "eslint-plugin-jsx": "0.1.0",
+    "eslint-plugin-react": "7.27.1",
     "esm": "3.2.25",
     "gulp": "4.0.2",
     "gulp-replace": "1.1.3",
     "husky": "8.0.1",
-    "jsdom": "19.0.0",
     "lint-staged": "12.4.1",
     "prettier": "2.6.2",
     "rimraf": "3.0.2",

source/changelog.txt

@@ -1,6 +1,9 @@
 ### [Unreleased]
 #### Added
+- Add Gutenberg events list block
+- Show loading indicator during request
 #### Changed
+- Set list style type to none and left padding to zero for all occurences
 #### Deprecated
 #### Removed
 #### Fixed

source/connector-mobilizon.php

@@ -12,6 +12,7 @@
 
 require_once __DIR__ . '/includes/constants.php';
 require_once __DIR__ . '/includes/settings.php';
+require_once __DIR__ . '/includes/events-list-block.php';
 require_once __DIR__ . '/includes/events-list-shortcut.php';
 require_once __DIR__ . '/includes/events-list-widget.php';
 
@@ -24,7 +25,7 @@ final class Mobilizon_Connector {
 
   private function __construct() {
     add_action('init', [$this, 'register_blocks']);
-    add_action('init', [$this, 'register_settings']);
+    add_action('init', [$this, 'register_settings'], 1); // required for register_blocks
     add_action('init', [$this, 'register_shortcut']);
     add_action('widgets_init', [$this, 'register_widget']);
     add_action('wp_enqueue_scripts', [$this, 'register_scripts']);
@@ -44,16 +45,19 @@ final class Mobilizon_Connector {
     MobilizonConnector\Settings::setDefaultOptions();
   }
 
+  private function load_settings_globally_before_script($scriptName) {
+    $settings = array(
+      'isShortOffsetNameShown' => MobilizonConnector\Settings::isShortOffsetNameShown(),
+      'locale' => str_replace('_', '-', get_locale()),
+      'timeZone' => wp_timezone_string(),
+      'url' => MobilizonConnector\Settings::getUrl()
+    );
+    wp_add_inline_script($scriptName, 'var MOBILIZON_CONNECTOR = ' . json_encode($settings), 'before');
+  }
+
   public function register_blocks() {
-    wp_register_script(MobilizonConnector\NAME . '-block-starter', plugins_url('front/block-events-loader.js', __FILE__ ), [
-        'wp-blocks',
-        'wp-components',
-        'wp-editor',
-        'wp-i18n'
-      ]);
-    register_block_type(MobilizonConnector\NAME . '/events-list', [
-      'editor_script' => MobilizonConnector\NAME . '-block-starter'
-    ]);
+    $scriptName = MobilizonConnector\EventsListBlock::initAndReturnScriptName();
+    $this->load_settings_globally_before_script($scriptName);
   }
 
   public function register_settings() {
@@ -61,7 +65,9 @@ final class Mobilizon_Connector {
   }
 
   public function register_scripts() {
-    wp_enqueue_script(MobilizonConnector\NAME . '-js', plugins_url('front/events-loader.js', __FILE__ ));
+    $name = MobilizonConnector\NAME . '-js';
+    wp_enqueue_script($name, plugins_url('front/events-loader.js', __FILE__ ));
+    $this->load_settings_globally_before_script($name);
   }
 
   public function register_shortcut() {

source/front/block-events-loader.js

@@ -1 +1 @@
-import './blocks/events-list'
+import './blocks/events-list/index.js'

source/front/blocks/events-list/edit.js

@@ -1,15 +1,44 @@
-const { InspectorControls } = wp.blockEditor
+/* eslint-disable @wordpress/i18n-ellipsis */
+import { loadEventList } from '../../events-loader.js'
+
+const { InspectorControls, useBlockProps } = wp.blockEditor
 const { PanelBody } = wp.components
+const { useEffect } = wp.element
 const { __ } = wp.i18n
 
+const NAME = '<wordpress-name>'
+
+let timer
+
 export default ({ attributes, setAttributes }) => {
+  const blockProps = useBlockProps({
+    className: NAME + '_events-list',
+    'data-maximum': attributes.eventsCount,
+    'data-group-name': attributes.groupName,
+  })
+  function reloadEventList() {
+    if (timer) {
+      clearTimeout(timer)
+    }
+    timer = setTimeout(() => {
+      const container = document.getElementById(blockProps.id)
+      if (container) {
+        loadEventList(container)
+      }
+    }, 500)
+  }
+  useEffect(() => {
+    reloadEventList()
+  }, [])
   function updateEventsCount(event) {
     let newValue = Number(event.target.value)
     if (newValue < 1) newValue = 1
     setAttributes({ eventsCount: newValue })
+    reloadEventList()
   }
   function updateGroupName(event) {
     setAttributes({ groupName: event.target.value })
+    reloadEventList()
   }
   return [
     <InspectorControls>
@@ -42,12 +71,17 @@ export default ({ attributes, setAttributes }) => {
         />
       </PanelBody>
     </InspectorControls>,
-    <ul>
-      {[...Array(attributes.eventsCount)].map((_, i) => (
-        <li className="busterCards" key={i}>
-          {__('Event', '<wordpress-name>')} {i}
-        </li>
-      ))}
-    </ul>,
+    <div {...blockProps}>
+      <div className="general-error" style={{ display: 'none' }}>
+        {__('The events could not be loaded!', '<wordpress-name>')}
+      </div>
+      <div className="group-not-found" style={{ display: 'none' }}>
+        {__('The group could not be found!', '<wordpress-name>')}
+      </div>
+      <div className="loading-indicator" style={{ display: 'none' }}>
+        {__('Loading...', '<wordpress-name>')}
+      </div>
+      <ul style={{ 'list-style-type': 'none', 'padding-left': 0 }}></ul>
+    </div>,
   ]
 }

source/front/blocks/events-list/index.js

@@ -1,31 +1,7 @@
-import edit from './edit'
-import save from './save'
+import edit from './edit.js'
 
 const { registerBlockType } = wp.blocks
-const { __ } = wp.i18n
 
 const NAME = '<wordpress-name>'
 
-registerBlockType(NAME + '/events-list', {
-  title: __('Events List', '<wordpress-name>'),
-  description: __(
-    'A list of the upcoming events of the connected Mobilizon instance.',
-    '<wordpress-name>'
-  ),
-  icon: 'list-view',
-  category: 'widgets',
-  attributes: {
-    eventsCount: {
-      type: 'number',
-      default: 3,
-    },
-    groupName: {
-      type: 'string',
-    },
-  },
-  supports: {
-    html: false,
-  },
-  edit,
-  save,
-})
+registerBlockType(NAME + '/events-list', { edit })

source/front/blocks/events-list/save.js

@@ -1,25 +0,0 @@
-const { __ } = wp.i18n
-
-const NAME = '<wordpress-name>'
-
-const URL = 'https://mobilizon.fr' // TODO
-const LOCALE = 'en-GB' // TODO
-const TIMEZONE = 'Europe/Rome' // TODO
-const isShortOffsetNameShown = true // eslint-disable-line no-unused-vars
-
-export default ({ attributes }) => {
-  return (
-    <ul
-      className={NAME + '_events-list'}
-      data-url={URL}
-      data-locale={LOCALE}
-      data-maximum={attributes.eventsCount}
-      data-group-name={attributes.groupName}
-      data-time-zone={TIMEZONE}
-    >
-      <li style="display: none;">
-        {__('The events could not be loaded!', '<wordpress-name>')}
-      </li>
-    </ul>
-  )
-}

source/front/events-displayer-test.js

@@ -1,29 +1,45 @@
 import test from 'ava'
-import { JSDOM } from 'jsdom'
+import browserEnv from 'browser-env'
 
-import { displayEvents, displayErrorMessage } from './events-displayer.js'
-
-let document
+import {
+  displayEvents,
+  displayErrorMessage,
+  hideErrorMessages,
+  showLoadingIndicator,
+} from './events-displayer.js'
 
 test.before(() => {
-  document = new JSDOM().window.document
+  browserEnv()
+  window.MOBILIZON_CONNECTOR = {
+    locale: 'en-GB',
+    timeZone: 'utc',
+  }
 })
 
 test.beforeEach((t) => {
-  t.context.list = document.createElement('ul')
-  t.context.list.setAttribute('data-locale', 'en-GB')
-  t.context.list.setAttribute('data-maximum', '2')
-  t.context.list.setAttribute('data-time-zone', 'utc')
-  const listElement = document.createElement('li')
-  listElement.setAttribute('style', 'display: none;')
-  t.context.list.appendChild(listElement)
-  const listElement2 = document.createElement('li')
-  listElement2.setAttribute('style', 'display: none;')
-  t.context.list.appendChild(listElement2)
+  t.context.container = document.createElement('div')
+  t.context.container.setAttribute('data-maximum', '2')
+
+  const errorMessageGeneral = document.createElement('div')
+  errorMessageGeneral.setAttribute('class', 'general-error')
+  errorMessageGeneral.setAttribute('style', 'display: none;')
+  t.context.container.appendChild(errorMessageGeneral)
+
+  const errorMessageGroupNotFound = document.createElement('div')
+  errorMessageGroupNotFound.setAttribute('class', 'group-not-found')
+  errorMessageGroupNotFound.setAttribute('style', 'display: none;')
+  t.context.container.appendChild(errorMessageGroupNotFound)
+
+  const loadingIndicator = document.createElement('div')
+  loadingIndicator.setAttribute('class', 'loading-indicator')
+  loadingIndicator.setAttribute('style', 'display: none;')
+  t.context.container.appendChild(loadingIndicator)
+
+  const list = document.createElement('ul')
+  t.context.container.appendChild(list)
 })
 
 test('#displayEvents one event', (t) => {
-  const list = t.context.list
   const data = {
     events: {
       elements: [
@@ -40,32 +56,35 @@ test('#displayEvents one event', (t) => {
       ],
     },
   }
-  displayEvents({ data, document, list })
-  t.is(list.children.length, 3)
-  t.is(list.children[2].childNodes[0].tagName, 'A')
-  t.is(list.children[2].childNodes[0].getAttribute('href'), 'b')
-  t.is(list.children[2].childNodes[0].childNodes[0].nodeValue, 'a')
-  t.is(list.children[2].childNodes[1].tagName, 'BR')
-  t.is(list.children[2].childNodes[2].nodeValue, '15/04/2021 10:30 - 15:30')
-  t.is(list.children[2].childNodes[3].tagName, 'BR')
-  t.is(list.children[2].childNodes[4].nodeValue, 'c, d')
+  const container = t.context.container
+  displayEvents({ data, document, container })
+  const list = container.querySelector('ul')
+  t.is(list.children[0].childNodes[0].tagName, 'A')
+  t.is(list.children[0].childNodes[0].getAttribute('href'), 'b')
+  t.is(list.children[0].childNodes[0].childNodes[0].nodeValue, 'a')
+  t.is(list.children[0].childNodes[1].tagName, 'BR')
+  t.is(list.children[0].childNodes[2].nodeValue, '15/04/2021 10:30 - 15:30')
+  t.is(list.children[0].childNodes[3].tagName, 'BR')
+  t.is(list.children[0].childNodes[4].nodeValue, 'c, d')
 })
 
-test('#displayErrorMessage no children added', (t) => {
-  const list = t.context.list
-  displayErrorMessage({ data: '', list })
-  t.is(list.children.length, 2)
+test('#displayErrorMessage no list entries shown', (t) => {
+  const container = t.context.container
+  displayErrorMessage({ data: '', container })
+  const list = container.querySelector('ul')
+  t.is(list.children.length, 0)
 })
 
-test('#displayErrorMessage error message display', (t) => {
-  const list = t.context.list
-  displayErrorMessage({ data: '', list })
-  t.is(list.children[0].style.display, 'block')
-  t.is(list.children[1].style.display, 'none')
+test('#displayErrorMessage general error message display', (t) => {
+  const container = t.context.container
+  displayErrorMessage({ data: '', container })
+  t.is(container.querySelector('.general-error').style.display, 'block')
+  t.is(container.querySelector('.group-not-found').style.display, 'none')
+  t.is(container.querySelector('.loading-indicator').style.display, 'none')
 })
 
 test('#displayErrorMessage group not found error message display', (t) => {
-  const list = t.context.list
+  const container = t.context.container
   const data = {
     response: {
       errors: [
@@ -75,7 +94,29 @@ test('#displayErrorMessage group not found error message display', (t) => {
       ],
     },
   }
-  displayErrorMessage({ data, list })
-  t.is(list.children[0].style.display, 'none')
-  t.is(list.children[1].style.display, 'block')
+  displayErrorMessage({ data, container })
+  t.is(container.querySelector('.general-error').style.display, 'none')
+  t.is(container.querySelector('.group-not-found').style.display, 'block')
+  t.is(container.querySelector('.loading-indicator').style.display, 'none')
+})
+
+test('#showLoadingIndicator remove events', (t) => {
+  const container = t.context.container
+  const loadingIndicator = container.querySelector('.loading-indicator')
+  t.is(loadingIndicator.style.display, 'none')
+  showLoadingIndicator(container)
+  t.is(loadingIndicator.style.display, 'block')
+})
+
+test('#hideErrorMessages remove events', (t) => {
+  const container = t.context.container
+  const generalErrorMessage = container.querySelector('.general-error')
+  const groupNotFoundErrorMessage = container.querySelector('.group-not-found')
+  generalErrorMessage.style.display = 'block'
+  groupNotFoundErrorMessage.style.display = 'block'
+  t.is(generalErrorMessage.style.display, 'block')
+  t.is(groupNotFoundErrorMessage.style.display, 'block')
+  hideErrorMessages(container)
+  t.is(generalErrorMessage.style.display, 'none')
+  t.is(groupNotFoundErrorMessage.style.display, 'none')
 })

source/front/events-displayer.js

@@ -1,17 +1,25 @@
 import Formatter from './formatter.js'
 import { createAnchorElement } from './html-creator.js'
 
-export function displayEvents({ data, document, list }) {
-  const locale = list.getAttribute('data-locale')
-  const maxEventsCount = list.getAttribute('data-maximum')
-  const timeZone = list.getAttribute('data-time-zone')
-  const isShortOffsetNameShown = list.hasAttribute(
-    'data-is-short-offset-name-shown'
-  )
+export function clearEventsList(container) {
+  const list = container.querySelector('ul')
+  list.replaceChildren()
+}
+
+export function displayEvents({ data, document, container }) {
+  hideLoadingIndicator(container)
+
+  const isShortOffsetNameShown =
+    window.MOBILIZON_CONNECTOR.isShortOffsetNameShown
+  const locale = window.MOBILIZON_CONNECTOR.locale
+  const maxEventsCount = container.getAttribute('data-maximum')
+  const timeZone = window.MOBILIZON_CONNECTOR.timeZone
+
   const events = data.events
     ? data.events.elements
     : data.group.organizedEvents.elements
   const eventsCount = Math.min(maxEventsCount, events.length)
+  const list = container.querySelector('ul')
   for (let i = 0; i < eventsCount; i++) {
     const li = document.createElement('li')
 
@@ -53,8 +61,8 @@ export function displayEvents({ data, document, list }) {
   }
 }
 
-export function displayErrorMessage({ data, list }) {
-  console.error(data)
+export function displayErrorMessage({ data, container }) {
+  hideLoadingIndicator(container)
   if (
     Object.prototype.hasOwnProperty.call(data, 'response') &&
     Object.prototype.hasOwnProperty.call(data.response, 'errors') &&
@@ -62,8 +70,26 @@ export function displayErrorMessage({ data, list }) {
     Object.prototype.hasOwnProperty.call(data.response.errors[0], 'code') &&
     data.response.errors[0].code === 'group_not_found'
   ) {
-    list.children[1].style.display = 'block'
+    const message = container.querySelector('.group-not-found')
+    message.style.display = 'block'
   } else {
-    list.children[0].style.display = 'block'
+    const message = container.querySelector('.general-error')
+    message.style.display = 'block'
+    console.error(data)
   }
 }
+
+export function showLoadingIndicator(container) {
+  const indicator = container.querySelector('.loading-indicator')
+  indicator.style.display = 'block'
+}
+
+function hideLoadingIndicator(container) {
+  const indicator = container.querySelector('.loading-indicator')
+  indicator.style.display = 'none'
+}
+
+export function hideErrorMessages(container) {
+  container.querySelector('.group-not-found').style.display = 'none'
+  container.querySelector('.general-error').style.display = 'none'
+}

source/front/events-loader.js

@@ -1,22 +1,38 @@
-import { displayEvents, displayErrorMessage } from './events-displayer.js'
+import {
+  clearEventsList,
+  displayEvents,
+  displayErrorMessage,
+  hideErrorMessages,
+  showLoadingIndicator,
+} from './events-displayer.js'
 import * as GraphqlWrapper from './graphql-wrapper.js'
 
 const NAME = '<wordpress-name>'
+const URL_SUFFIX = '/api'
 
-document.addEventListener('DOMContentLoaded', () => {
+document.addEventListener('DOMContentLoaded', loadEventLists)
+
+function loadEventLists() {
   const eventLists = document.getElementsByClassName(NAME + '_events-list')
   for (const list of eventLists) {
-    const url = list.getAttribute('data-url') + '/api'
-    const limit = parseInt(list.getAttribute('data-maximum'))
-    const groupName = list.getAttribute('data-group-name')
-    if (groupName) {
-      GraphqlWrapper.getUpcomingEventsByGroupName({ url, limit, groupName })
-        .then((data) => displayEvents({ data, document, list }))
-        .catch((data) => displayErrorMessage({ data, list }))
-    } else {
-      GraphqlWrapper.getUpcomingEvents({ url, limit })
-        .then((data) => displayEvents({ data, document, list }))
-        .catch((data) => displayErrorMessage({ data, list }))
-    }
+    loadEventList(list)
   }
-})
+}
+
+export function loadEventList(container) {
+  const url = MOBILIZON_CONNECTOR.url + URL_SUFFIX
+  const limit = parseInt(container.getAttribute('data-maximum'))
+  const groupName = container.getAttribute('data-group-name')
+  hideErrorMessages(container)
+  clearEventsList(container)
+  showLoadingIndicator(container)
+  if (groupName) {
+    GraphqlWrapper.getUpcomingEventsByGroupName({ url, limit, groupName })
+      .then((data) => displayEvents({ data, document, container }))
+      .catch((data) => displayErrorMessage({ data, container }))
+  } else {
+    GraphqlWrapper.getUpcomingEvents({ url, limit })
+      .then((data) => displayEvents({ data, document, container }))
+      .catch((data) => displayErrorMessage({ data, container }))
+  }
+}

source/front/html-creator-test.js

@@ -1,12 +1,10 @@
 import test from 'ava'
-import { JSDOM } from 'jsdom'
+import browserEnv from 'browser-env'
 
 import { createAnchorElement } from './html-creator.js'
 
-let document
-
 test.beforeEach(() => {
-  document = new JSDOM().window.document
+  browserEnv()
 })
 
 test('#createAnchorElement usual parameters', (t) => {

source/includes/events-list-block.php

@@ -0,0 +1,54 @@
+<?php
+namespace MobilizonConnector;
+
+// Exit if this file is called directly.
+if (!defined('ABSPATH')) {
+  exit;
+}
+
+class EventsListBlock {
+
+  public static function initAndReturnScriptName(): string {
+    $scriptName = NAME . '-block-starter';
+    wp_register_script($scriptName, plugins_url(NAME . '/front/block-events-loader.js'), [
+        'wp-block-editor',
+        'wp-blocks',
+        'wp-components',
+        'wp-editor',
+        'wp-i18n'
+      ]);
+    register_block_type(NAME . '/events-list', [
+      'api_version' => 2,
+      'title' => __('Events List', 'connector-mobilizon'),
+      'description' =>  __('A list of the upcoming events of the connected Mobilizon instance.', 'connector-mobilizon'),
+      'category' => 'widgets',
+      'icon' => 'list-view',
+      'supports' => [
+        'html' => false
+      ],
+      'attributes' => [
+        'eventsCount' => [
+          'type' => 'number',
+          'default' => 3,
+        ],
+        'groupName' => [
+          'type' => 'string',
+        ],
+      ],
+      'editor_script' => $scriptName,
+      'render_callback' => 'MobilizonConnector\EventsListBlock::render',
+    ]);
+    return $scriptName;
+  }
+
+  public static function render($block_attributes, $content) {
+    $classNamePrefix = NAME;
+    $eventsCount = $block_attributes['eventsCount'];
+    $groupName = isset($block_attributes['groupName']) ? $block_attributes['groupName'] : '';
+
+    ob_start();
+    require dirname(__DIR__) . '/view/events-list.php';
+    $output = ob_get_clean();
+    return $output;
+  }
+}

source/includes/events-list-shortcut.php

@@ -26,11 +26,7 @@ class EventsListShortcut {
 
     $classNamePrefix = NAME;
     $eventsCount = $atts_with_overriden_defaults['events-count'];
-    $locale = str_replace('_', '-', get_locale());
     $groupName = $atts_with_overriden_defaults['group-name'];
-    $url = Settings::getUrl();
-    $timeZone = wp_timezone_string();
-    $isShortOffsetNameShown = Settings::isShortOffsetNameShown();
 
     ob_start();
     require dirname(__DIR__) . '/view/events-list.php';

source/includes/events-list-widget.php

@@ -27,11 +27,7 @@ class EventsListWidget extends \WP_Widget {
 
     $classNamePrefix = NAME;
     $eventsCount = $options['eventsCount'];
-    $locale = str_replace('_', '-', get_locale());
     $groupName = isset($options['groupName']) ? $options['groupName'] : '';
-    $url = Settings::getUrl();
-    $timeZone = wp_timezone_string();
-    $isShortOffsetNameShown = Settings::isShortOffsetNameShown();
 
     require dirname(__DIR__) . '/view/events-list.php';
 

source/readme.txt

@@ -15,11 +15,11 @@ License: <wordpress-license>
 <wordpress-nice-name> allows you to display the upcoming events of [Mobilizon](https://joinmobilizon.org/), which is a federated event listing platform, on your WordPress website.
 
 Features
-- Display events as widget and as shortcut
+- Display events as Gutenberg block, as widget and as shortcut
 - Display events' title, date, and location if available
 - Cache requests' responses for 2 minutes in the browser's `sessionStorage`
-- Configure number of events to show per widget and per shortcut
-- Optionally filter events by a specific group per widget and per shortcut
+- Configure number of events to show per block, per widget and per shortcut
+- Optionally filter events by a specific group per block, per widget and per shortcut
 - Set the URL of the Mobilizon instance in the settings
 - Toggle adding named offset in brackets after the time in the settings
 

source/view/events-list.php

@@ -4,13 +4,11 @@ if (!defined('ABSPATH')) {
   exit;
 }
 ?>
-<ul class="<?php echo esc_attr($classNamePrefix); ?>_events-list"
-  data-url="<?php echo esc_attr($url); ?>"
-  data-locale="<?php echo esc_attr($locale); ?>"
+<div class="<?php echo esc_attr($classNamePrefix); ?>_events-list"
   data-maximum="<?php echo esc_attr($eventsCount); ?>"
-  data-group-name="<?php echo esc_attr($groupName); ?>"
-  data-time-zone="<?php echo esc_attr($timeZone); ?>"
-  <?php echo $isShortOffsetNameShown ? 'data-is-short-offset-name-shown' : ''; ?>>
-  <li style="display: none;"><?php esc_html_e('The events could not be loaded!', 'connector-mobilizon'); ?></li>
-  <li style="display: none;"><?php esc_html_e('The group could not be found!', 'connector-mobilizon'); ?></li>
-</ul>
+  data-group-name="<?php echo esc_attr($groupName); ?>">
+  <div class="general-error" style="display: none;"><?php esc_html_e('The events could not be loaded!', 'connector-mobilizon'); ?></div>
+  <div class="group-not-found" style="display: none;"><?php esc_html_e('The group could not be found!', 'connector-mobilizon'); ?></div>
+  <div class="loading-indicator" style="display: none;"><?php esc_html_e('Loading...', 'connector-mobilizon'); ?></div>
+  <ul style="list-style-type: none; padding-left: 0;"></ul>
+</div>

webpack.config.cjs

@@ -14,17 +14,6 @@ module.exports = {
     filename: '[name].js',
     path: path.resolve(__dirname, 'build/front'),
   },
-  module: {
-    rules: [
-      {
-        test: /\.m?js$/,
-        exclude: /(node_modules)/,
-        use: {
-          loader: 'babel-loader',
-        },
-      },
-    ],
-  },
   module: {
     rules: [
       {