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/wp-includes/js/dist/ -> a11y.js (source)

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  47  /************************************************************************/
  48  var __webpack_exports__ = {};
  49  // ESM COMPAT FLAG
  50  __webpack_require__.r(__webpack_exports__);
  51  
  52  // EXPORTS
  53  __webpack_require__.d(__webpack_exports__, {
  54    "setup": function() { return /* binding */ setup; },
  55    "speak": function() { return /* binding */ speak; }
  56  });
  57  
  58  ;// CONCATENATED MODULE: external ["wp","domReady"]
  59  var external_wp_domReady_namespaceObject = window["wp"]["domReady"];
  60  var external_wp_domReady_default = /*#__PURE__*/__webpack_require__.n(external_wp_domReady_namespaceObject);
  61  ;// CONCATENATED MODULE: external ["wp","i18n"]
  62  var external_wp_i18n_namespaceObject = window["wp"]["i18n"];
  63  ;// CONCATENATED MODULE: ./node_modules/@wordpress/a11y/build-module/add-intro-text.js
  64  /**
  65   * WordPress dependencies
  66   */
  67  
  68  /**
  69   * Build the explanatory text to be placed before the aria live regions.
  70   *
  71   * This text is initially hidden from assistive technologies by using a `hidden`
  72   * HTML attribute which is then removed once a message fills the aria-live regions.
  73   *
  74   * @return {HTMLParagraphElement} The explanatory text HTML element.
  75   */
  76  
  77  function addIntroText() {
  78    const introText = document.createElement('p');
  79    introText.id = 'a11y-speak-intro-text';
  80    introText.className = 'a11y-speak-intro-text';
  81    introText.textContent = (0,external_wp_i18n_namespaceObject.__)('Notifications');
  82    introText.setAttribute('style', 'position: absolute;' + 'margin: -1px;' + 'padding: 0;' + 'height: 1px;' + 'width: 1px;' + 'overflow: hidden;' + 'clip: rect(1px, 1px, 1px, 1px);' + '-webkit-clip-path: inset(50%);' + 'clip-path: inset(50%);' + 'border: 0;' + 'word-wrap: normal !important;');
  83    introText.setAttribute('hidden', 'hidden');
  84    const {
  85      body
  86    } = document;
  87  
  88    if (body) {
  89      body.appendChild(introText);
  90    }
  91  
  92    return introText;
  93  }
  94  
  95  ;// CONCATENATED MODULE: ./node_modules/@wordpress/a11y/build-module/add-container.js
  96  /**
  97   * Build the live regions markup.
  98   *
  99   * @param {string} [ariaLive] Value for the 'aria-live' attribute; default: 'polite'.
 100   *
 101   * @return {HTMLDivElement} The ARIA live region HTML element.
 102   */
 103  function addContainer() {
 104    let ariaLive = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : 'polite';
 105    const container = document.createElement('div');
 106    container.id = `a11y-speak-$ariaLive}`;
 107    container.className = 'a11y-speak-region';
 108    container.setAttribute('style', 'position: absolute;' + 'margin: -1px;' + 'padding: 0;' + 'height: 1px;' + 'width: 1px;' + 'overflow: hidden;' + 'clip: rect(1px, 1px, 1px, 1px);' + '-webkit-clip-path: inset(50%);' + 'clip-path: inset(50%);' + 'border: 0;' + 'word-wrap: normal !important;');
 109    container.setAttribute('aria-live', ariaLive);
 110    container.setAttribute('aria-relevant', 'additions text');
 111    container.setAttribute('aria-atomic', 'true');
 112    const {
 113      body
 114    } = document;
 115  
 116    if (body) {
 117      body.appendChild(container);
 118    }
 119  
 120    return container;
 121  }
 122  
 123  ;// CONCATENATED MODULE: ./node_modules/@wordpress/a11y/build-module/clear.js
 124  /**
 125   * Clears the a11y-speak-region elements and hides the explanatory text.
 126   */
 127  function clear() {
 128    const regions = document.getElementsByClassName('a11y-speak-region');
 129    const introText = document.getElementById('a11y-speak-intro-text');
 130  
 131    for (let i = 0; i < regions.length; i++) {
 132      regions[i].textContent = '';
 133    } // Make sure the explanatory text is hidden from assistive technologies.
 134  
 135  
 136    if (introText) {
 137      introText.setAttribute('hidden', 'hidden');
 138    }
 139  }
 140  
 141  ;// CONCATENATED MODULE: ./node_modules/@wordpress/a11y/build-module/filter-message.js
 142  let previousMessage = '';
 143  /**
 144   * Filter the message to be announced to the screenreader.
 145   *
 146   * @param {string} message The message to be announced.
 147   *
 148   * @return {string} The filtered message.
 149   */
 150  
 151  function filterMessage(message) {
 152    /*
 153     * Strip HTML tags (if any) from the message string. Ideally, messages should
 154     * be simple strings, carefully crafted for specific use with A11ySpeak.
 155     * When re-using already existing strings this will ensure simple HTML to be
 156     * stripped out and replaced with a space. Browsers will collapse multiple
 157     * spaces natively.
 158     */
 159    message = message.replace(/<[^<>]+>/g, ' ');
 160    /*
 161     * Safari + VoiceOver don't announce repeated, identical strings. We use
 162     * a `no-break space` to force them to think identical strings are different.
 163     */
 164  
 165    if (previousMessage === message) {
 166      message += '\u00A0';
 167    }
 168  
 169    previousMessage = message;
 170    return message;
 171  }
 172  
 173  ;// CONCATENATED MODULE: ./node_modules/@wordpress/a11y/build-module/index.js
 174  /**
 175   * WordPress dependencies
 176   */
 177  
 178  /**
 179   * Internal dependencies
 180   */
 181  
 182  
 183  
 184  
 185  
 186  /**
 187   * Create the live regions.
 188   */
 189  
 190  function setup() {
 191    const introText = document.getElementById('a11y-speak-intro-text');
 192    const containerAssertive = document.getElementById('a11y-speak-assertive');
 193    const containerPolite = document.getElementById('a11y-speak-polite');
 194  
 195    if (introText === null) {
 196      addIntroText();
 197    }
 198  
 199    if (containerAssertive === null) {
 200      addContainer('assertive');
 201    }
 202  
 203    if (containerPolite === null) {
 204      addContainer('polite');
 205    }
 206  }
 207  /**
 208   * Run setup on domReady.
 209   */
 210  
 211  external_wp_domReady_default()(setup);
 212  /**
 213   * Allows you to easily announce dynamic interface updates to screen readers using ARIA live regions.
 214   * This module is inspired by the `speak` function in `wp-a11y.js`.
 215   *
 216   * @param {string} message    The message to be announced by assistive technologies.
 217   * @param {string} [ariaLive] The politeness level for aria-live; default: 'polite'.
 218   *
 219   * @example
 220   * ```js
 221   * import { speak } from '@wordpress/a11y';
 222   *
 223   * // For polite messages that shouldn't interrupt what screen readers are currently announcing.
 224   * speak( 'The message you want to send to the ARIA live region' );
 225   *
 226   * // For assertive messages that should interrupt what screen readers are currently announcing.
 227   * speak( 'The message you want to send to the ARIA live region', 'assertive' );
 228   * ```
 229   */
 230  
 231  function speak(message, ariaLive) {
 232    /*
 233     * Clear previous messages to allow repeated strings being read out and hide
 234     * the explanatory text from assistive technologies.
 235     */
 236    clear();
 237    message = filterMessage(message);
 238    const introText = document.getElementById('a11y-speak-intro-text');
 239    const containerAssertive = document.getElementById('a11y-speak-assertive');
 240    const containerPolite = document.getElementById('a11y-speak-polite');
 241  
 242    if (containerAssertive && ariaLive === 'assertive') {
 243      containerAssertive.textContent = message;
 244    } else if (containerPolite) {
 245      containerPolite.textContent = message;
 246    }
 247    /*
 248     * Make the explanatory text available to assistive technologies by removing
 249     * the 'hidden' HTML attribute.
 250     */
 251  
 252  
 253    if (introText) {
 254      introText.removeAttribute('hidden');
 255    }
 256  }
 257  
 258  (window.wp = window.wp || {}).a11y = __webpack_exports__;
 259  /******/ })()
 260  ;


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