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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  /***/ "Y8OO":
  91  /***/ (function(module, exports) {
  92  
  93  (function() { module.exports = window["wp"]["domReady"]; }());
  94  
  95  /***/ }),
  96  
  97  /***/ "jncB":
  98  /***/ (function(module, __webpack_exports__, __webpack_require__) {
  99  
 100  "use strict";
 101  // ESM COMPAT FLAG
 102  __webpack_require__.r(__webpack_exports__);
 103  
 104  // EXPORTS
 105  __webpack_require__.d(__webpack_exports__, "setup", function() { return /* binding */ setup; });
 106  __webpack_require__.d(__webpack_exports__, "speak", function() { return /* binding */ speak; });
 107  
 108  // EXTERNAL MODULE: external ["wp","domReady"]
 109  var external_wp_domReady_ = __webpack_require__("Y8OO");
 110  var external_wp_domReady_default = /*#__PURE__*/__webpack_require__.n(external_wp_domReady_);
 111  
 112  // EXTERNAL MODULE: external ["wp","i18n"]
 113  var external_wp_i18n_ = __webpack_require__("l3Sj");
 114  
 115  // CONCATENATED MODULE: ./node_modules/@wordpress/a11y/build-module/add-intro-text.js
 116  /**
 117   * WordPress dependencies
 118   */
 119  
 120  /**
 121   * Build the explanatory text to be placed before the aria live regions.
 122   *
 123   * This text is initially hidden from assistive technologies by using a `hidden`
 124   * HTML attribute which is then removed once a message fills the aria-live regions.
 125   *
 126   * @return {HTMLParagraphElement} The explanatory text HTML element.
 127   */
 128  
 129  function addIntroText() {
 130    const introText = document.createElement('p');
 131    introText.id = 'a11y-speak-intro-text';
 132    introText.className = 'a11y-speak-intro-text';
 133    introText.textContent = Object(external_wp_i18n_["__"])('Notifications');
 134    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;');
 135    introText.setAttribute('hidden', 'hidden');
 136    const {
 137      body
 138    } = document;
 139  
 140    if (body) {
 141      body.appendChild(introText);
 142    }
 143  
 144    return introText;
 145  }
 146  
 147  // CONCATENATED MODULE: ./node_modules/@wordpress/a11y/build-module/add-container.js
 148  /**
 149   * Build the live regions markup.
 150   *
 151   * @param {string} [ariaLive] Value for the 'aria-live' attribute; default: 'polite'.
 152   *
 153   * @return {HTMLDivElement} The ARIA live region HTML element.
 154   */
 155  function addContainer() {
 156    let ariaLive = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : 'polite';
 157    const container = document.createElement('div');
 158    container.id = `a11y-speak-$ariaLive}`;
 159    container.className = 'a11y-speak-region';
 160    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;');
 161    container.setAttribute('aria-live', ariaLive);
 162    container.setAttribute('aria-relevant', 'additions text');
 163    container.setAttribute('aria-atomic', 'true');
 164    const {
 165      body
 166    } = document;
 167  
 168    if (body) {
 169      body.appendChild(container);
 170    }
 171  
 172    return container;
 173  }
 174  
 175  // CONCATENATED MODULE: ./node_modules/@wordpress/a11y/build-module/clear.js
 176  /**
 177   * Clears the a11y-speak-region elements and hides the explanatory text.
 178   */
 179  function clear() {
 180    const regions = document.getElementsByClassName('a11y-speak-region');
 181    const introText = document.getElementById('a11y-speak-intro-text');
 182  
 183    for (let i = 0; i < regions.length; i++) {
 184      regions[i].textContent = '';
 185    } // Make sure the explanatory text is hidden from assistive technologies.
 186  
 187  
 188    if (introText) {
 189      introText.setAttribute('hidden', 'hidden');
 190    }
 191  }
 192  
 193  // CONCATENATED MODULE: ./node_modules/@wordpress/a11y/build-module/filter-message.js
 194  let previousMessage = '';
 195  /**
 196   * Filter the message to be announced to the screenreader.
 197   *
 198   * @param {string} message The message to be announced.
 199   *
 200   * @return {string} The filtered message.
 201   */
 202  
 203  function filterMessage(message) {
 204    /*
 205     * Strip HTML tags (if any) from the message string. Ideally, messages should
 206     * be simple strings, carefully crafted for specific use with A11ySpeak.
 207     * When re-using already existing strings this will ensure simple HTML to be
 208     * stripped out and replaced with a space. Browsers will collapse multiple
 209     * spaces natively.
 210     */
 211    message = message.replace(/<[^<>]+>/g, ' ');
 212    /*
 213     * Safari + VoiceOver don't announce repeated, identical strings. We use
 214     * a `no-break space` to force them to think identical strings are different.
 215     */
 216  
 217    if (previousMessage === message) {
 218      message += '\u00A0';
 219    }
 220  
 221    previousMessage = message;
 222    return message;
 223  }
 224  
 225  // CONCATENATED MODULE: ./node_modules/@wordpress/a11y/build-module/index.js
 226  /**
 227   * WordPress dependencies
 228   */
 229  
 230  /**
 231   * Internal dependencies
 232   */
 233  
 234  
 235  
 236  
 237  
 238  /**
 239   * Create the live regions.
 240   */
 241  
 242  function setup() {
 243    const introText = document.getElementById('a11y-speak-intro-text');
 244    const containerAssertive = document.getElementById('a11y-speak-assertive');
 245    const containerPolite = document.getElementById('a11y-speak-polite');
 246  
 247    if (introText === null) {
 248      addIntroText();
 249    }
 250  
 251    if (containerAssertive === null) {
 252      addContainer('assertive');
 253    }
 254  
 255    if (containerPolite === null) {
 256      addContainer('polite');
 257    }
 258  }
 259  /**
 260   * Run setup on domReady.
 261   */
 262  
 263  external_wp_domReady_default()(setup);
 264  /**
 265   * Allows you to easily announce dynamic interface updates to screen readers using ARIA live regions.
 266   * This module is inspired by the `speak` function in `wp-a11y.js`.
 267   *
 268   * @param {string} message    The message to be announced by assistive technologies.
 269   * @param {string} [ariaLive] The politeness level for aria-live; default: 'polite'.
 270   *
 271   * @example
 272   * ```js
 273   * import { speak } from '@wordpress/a11y';
 274   *
 275   * // For polite messages that shouldn't interrupt what screen readers are currently announcing.
 276   * speak( 'The message you want to send to the ARIA live region' );
 277   *
 278   * // For assertive messages that should interrupt what screen readers are currently announcing.
 279   * speak( 'The message you want to send to the ARIA live region', 'assertive' );
 280   * ```
 281   */
 282  
 283  function speak(message, ariaLive) {
 284    /*
 285     * Clear previous messages to allow repeated strings being read out and hide
 286     * the explanatory text from assistive technologies.
 287     */
 288    clear();
 289    message = filterMessage(message);
 290    const introText = document.getElementById('a11y-speak-intro-text');
 291    const containerAssertive = document.getElementById('a11y-speak-assertive');
 292    const containerPolite = document.getElementById('a11y-speak-polite');
 293  
 294    if (containerAssertive && ariaLive === 'assertive') {
 295      containerAssertive.textContent = message;
 296    } else if (containerPolite) {
 297      containerPolite.textContent = message;
 298    }
 299    /*
 300     * Make the explanatory text available to assistive technologies by removing
 301     * the 'hidden' HTML attribute.
 302     */
 303  
 304  
 305    if (introText) {
 306      introText.removeAttribute('hidden');
 307    }
 308  }
 309  
 310  
 311  /***/ }),
 312  
 313  /***/ "l3Sj":
 314  /***/ (function(module, exports) {
 315  
 316  (function() { module.exports = window["wp"]["i18n"]; }());
 317  
 318  /***/ })
 319  
 320  /******/ });


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