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

   1  this["wp"] = this["wp"] || {}; this["wp"]["a11y"] =
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  87  /************************************************************************/
  88  /******/ ({
  89  
  90  /***/ 1:
  91  /***/ (function(module, exports) {
  92  
  93  (function() { module.exports = window["wp"]["i18n"]; }());
  94  
  95  /***/ }),
  96  
  97  /***/ 277:
  98  /***/ (function(module, exports) {
  99  
 100  (function() { module.exports = window["wp"]["domReady"]; }());
 101  
 102  /***/ }),
 103  
 104  /***/ 481:
 105  /***/ (function(module, __webpack_exports__, __webpack_require__) {
 106  
 107  "use strict";
 108  // ESM COMPAT FLAG
 109  __webpack_require__.r(__webpack_exports__);
 110  
 111  // EXPORTS
 112  __webpack_require__.d(__webpack_exports__, "setup", function() { return /* binding */ setup; });
 113  __webpack_require__.d(__webpack_exports__, "speak", function() { return /* binding */ speak; });
 114  
 115  // EXTERNAL MODULE: external ["wp","domReady"]
 116  var external_wp_domReady_ = __webpack_require__(277);
 117  var external_wp_domReady_default = /*#__PURE__*/__webpack_require__.n(external_wp_domReady_);
 118  
 119  // EXTERNAL MODULE: external ["wp","i18n"]
 120  var external_wp_i18n_ = __webpack_require__(1);
 121  
 122  // CONCATENATED MODULE: ./node_modules/@wordpress/a11y/build-module/add-intro-text.js
 123  /**
 124   * WordPress dependencies
 125   */
 126  
 127  /**
 128   * Build the explanatory text to be placed before the aria live regions.
 129   *
 130   * This text is initially hidden from assistive technologies by using a `hidden`
 131   * HTML attribute which is then removed once a message fills the aria-live regions.
 132   *
 133   * @return {HTMLParagraphElement} The explanatory text HTML element.
 134   */
 135  
 136  function addIntroText() {
 137    var introText = document.createElement('p');
 138    introText.id = 'a11y-speak-intro-text';
 139    introText.className = 'a11y-speak-intro-text';
 140    introText.textContent = Object(external_wp_i18n_["__"])('Notifications');
 141    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;');
 142    introText.setAttribute('hidden', 'hidden');
 143    var _document = document,
 144        body = _document.body;
 145  
 146    if (body) {
 147      body.appendChild(introText);
 148    }
 149  
 150    return introText;
 151  }
 152  
 153  // CONCATENATED MODULE: ./node_modules/@wordpress/a11y/build-module/add-container.js
 154  /**
 155   * Build the live regions markup.
 156   *
 157   * @param {string} [ariaLive] Value for the 'aria-live' attribute; default: 'polite'.
 158   *
 159   * @return {HTMLDivElement} The ARIA live region HTML element.
 160   */
 161  function addContainer() {
 162    var ariaLive = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : 'polite';
 163    var container = document.createElement('div');
 164    container.id = "a11y-speak-".concat(ariaLive);
 165    container.className = 'a11y-speak-region';
 166    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;');
 167    container.setAttribute('aria-live', ariaLive);
 168    container.setAttribute('aria-relevant', 'additions text');
 169    container.setAttribute('aria-atomic', 'true');
 170    var _document = document,
 171        body = _document.body;
 172  
 173    if (body) {
 174      body.appendChild(container);
 175    }
 176  
 177    return container;
 178  }
 179  
 180  // CONCATENATED MODULE: ./node_modules/@wordpress/a11y/build-module/clear.js
 181  /**
 182   * Clears the a11y-speak-region elements and hides the explanatory text.
 183   */
 184  function clear() {
 185    var regions = document.getElementsByClassName('a11y-speak-region');
 186    var introText = document.getElementById('a11y-speak-intro-text');
 187  
 188    for (var i = 0; i < regions.length; i++) {
 189      regions[i].textContent = '';
 190    } // Make sure the explanatory text is hidden from assistive technologies.
 191  
 192  
 193    if (introText) {
 194      introText.setAttribute('hidden', 'hidden');
 195    }
 196  }
 197  
 198  // CONCATENATED MODULE: ./node_modules/@wordpress/a11y/build-module/filter-message.js
 199  var previousMessage = '';
 200  /**
 201   * Filter the message to be announced to the screenreader.
 202   *
 203   * @param {string} message The message to be announced.
 204   *
 205   * @return {string} The filtered message.
 206   */
 207  
 208  function filterMessage(message) {
 209    /*
 210     * Strip HTML tags (if any) from the message string. Ideally, messages should
 211     * be simple strings, carefully crafted for specific use with A11ySpeak.
 212     * When re-using already existing strings this will ensure simple HTML to be
 213     * stripped out and replaced with a space. Browsers will collapse multiple
 214     * spaces natively.
 215     */
 216    message = message.replace(/<[^<>]+>/g, ' ');
 217    /*
 218     * Safari + VoiceOver don't announce repeated, identical strings. We use
 219     * a `no-break space` to force them to think identical strings are different.
 220     */
 221  
 222    if (previousMessage === message) {
 223      message += "\xA0";
 224    }
 225  
 226    previousMessage = message;
 227    return message;
 228  }
 229  
 230  // CONCATENATED MODULE: ./node_modules/@wordpress/a11y/build-module/index.js
 231  /**
 232   * WordPress dependencies
 233   */
 234  
 235  /**
 236   * Internal dependencies
 237   */
 238  
 239  
 240  
 241  
 242  
 243  /**
 244   * Create the live regions.
 245   */
 246  
 247  function setup() {
 248    var introText = document.getElementById('a11y-speak-intro-text');
 249    var containerAssertive = document.getElementById('a11y-speak-assertive');
 250    var containerPolite = document.getElementById('a11y-speak-polite');
 251  
 252    if (introText === null) {
 253      addIntroText();
 254    }
 255  
 256    if (containerAssertive === null) {
 257      addContainer('assertive');
 258    }
 259  
 260    if (containerPolite === null) {
 261      addContainer('polite');
 262    }
 263  }
 264  /**
 265   * Run setup on domReady.
 266   */
 267  
 268  external_wp_domReady_default()(setup);
 269  /**
 270   * Allows you to easily announce dynamic interface updates to screen readers using ARIA live regions.
 271   * This module is inspired by the `speak` function in `wp-a11y.js`.
 272   *
 273   * @param {string} message  The message to be announced by assistive technologies.
 274   * @param {string} [ariaLive] The politeness level for aria-live; default: 'polite'.
 275   *
 276   * @example
 277   * ```js
 278   * import { speak } from '@wordpress/a11y';
 279   *
 280   * // For polite messages that shouldn't interrupt what screen readers are currently announcing.
 281   * speak( 'The message you want to send to the ARIA live region' );
 282   *
 283   * // For assertive messages that should interrupt what screen readers are currently announcing.
 284   * speak( 'The message you want to send to the ARIA live region', 'assertive' );
 285   * ```
 286   */
 287  
 288  function speak(message, ariaLive) {
 289    /*
 290     * Clear previous messages to allow repeated strings being read out and hide
 291     * the explanatory text from assistive technologies.
 292     */
 293    clear();
 294    message = filterMessage(message);
 295    var introText = document.getElementById('a11y-speak-intro-text');
 296    var containerAssertive = document.getElementById('a11y-speak-assertive');
 297    var containerPolite = document.getElementById('a11y-speak-polite');
 298  
 299    if (containerAssertive && ariaLive === 'assertive') {
 300      containerAssertive.textContent = message;
 301    } else if (containerPolite) {
 302      containerPolite.textContent = message;
 303    }
 304    /*
 305     * Make the explanatory text available to assistive technologies by removing
 306     * the 'hidden' HTML attribute.
 307     */
 308  
 309  
 310    if (introText) {
 311      introText.removeAttribute('hidden');
 312    }
 313  }
 314  
 315  
 316  /***/ })
 317  
 318  /******/ });


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