WordPress/wp-includes/js/dist/a11y.js

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var __webpack_exports__ = {};
// ESM COMPAT FLAG
__webpack_require__.r(__webpack_exports__);

// EXPORTS
__webpack_require__.d(__webpack_exports__, {
  setup: function() { return /* binding */ setup; },
  speak: function() { return /* binding */ speak; }
});

;// CONCATENATED MODULE: external ["wp","domReady"]
var external_wp_domReady_namespaceObject = window["wp"]["domReady"];
var external_wp_domReady_default = /*#__PURE__*/__webpack_require__.n(external_wp_domReady_namespaceObject);
;// CONCATENATED MODULE: external ["wp","i18n"]
var external_wp_i18n_namespaceObject = window["wp"]["i18n"];
;// CONCATENATED MODULE: ./node_modules/@wordpress/a11y/build-module/add-intro-text.js
/**
 * WordPress dependencies
 */


/**
 * Build the explanatory text to be placed before the aria live regions.
 *
 * This text is initially hidden from assistive technologies by using a `hidden`
 * HTML attribute which is then removed once a message fills the aria-live regions.
 *
 * @return {HTMLParagraphElement} The explanatory text HTML element.
 */
function addIntroText() {
  const introText = document.createElement('p');
  introText.id = 'a11y-speak-intro-text';
  introText.className = 'a11y-speak-intro-text';
  introText.textContent = (0,external_wp_i18n_namespaceObject.__)('Notifications');
  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;');
  introText.setAttribute('hidden', 'hidden');
  const {
    body
  } = document;
  if (body) {
    body.appendChild(introText);
  }
  return introText;
}

;// CONCATENATED MODULE: ./node_modules/@wordpress/a11y/build-module/add-container.js
/**
 * Build the live regions markup.
 *
 * @param {string} [ariaLive] Value for the 'aria-live' attribute; default: 'polite'.
 *
 * @return {HTMLDivElement} The ARIA live region HTML element.
 */
function addContainer(ariaLive = 'polite') {
  const container = document.createElement('div');
  container.id = `a11y-speak-${ariaLive}`;
  container.className = 'a11y-speak-region';
  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;');
  container.setAttribute('aria-live', ariaLive);
  container.setAttribute('aria-relevant', 'additions text');
  container.setAttribute('aria-atomic', 'true');
  const {
    body
  } = document;
  if (body) {
    body.appendChild(container);
  }
  return container;
}

;// CONCATENATED MODULE: ./node_modules/@wordpress/a11y/build-module/clear.js
/**
 * Clears the a11y-speak-region elements and hides the explanatory text.
 */
function clear() {
  const regions = document.getElementsByClassName('a11y-speak-region');
  const introText = document.getElementById('a11y-speak-intro-text');
  for (let i = 0; i < regions.length; i++) {
    regions[i].textContent = '';
  }

  // Make sure the explanatory text is hidden from assistive technologies.
  if (introText) {
    introText.setAttribute('hidden', 'hidden');
  }
}

;// CONCATENATED MODULE: ./node_modules/@wordpress/a11y/build-module/filter-message.js
let previousMessage = '';

/**
 * Filter the message to be announced to the screenreader.
 *
 * @param {string} message The message to be announced.
 *
 * @return {string} The filtered message.
 */
function filterMessage(message) {
  /*
   * Strip HTML tags (if any) from the message string. Ideally, messages should
   * be simple strings, carefully crafted for specific use with A11ySpeak.
   * When re-using already existing strings this will ensure simple HTML to be
   * stripped out and replaced with a space. Browsers will collapse multiple
   * spaces natively.
   */
  message = message.replace(/<[^<>]+>/g, ' ');

  /*
   * Safari + VoiceOver don't announce repeated, identical strings. We use
   * a `no-break space` to force them to think identical strings are different.
   */
  if (previousMessage === message) {
    message += '\u00A0';
  }
  previousMessage = message;
  return message;
}

;// CONCATENATED MODULE: ./node_modules/@wordpress/a11y/build-module/index.js
/**
 * WordPress dependencies
 */


/**
 * Internal dependencies
 */





/**
 * Create the live regions.
 */
function setup() {
  const introText = document.getElementById('a11y-speak-intro-text');
  const containerAssertive = document.getElementById('a11y-speak-assertive');
  const containerPolite = document.getElementById('a11y-speak-polite');
  if (introText === null) {
    addIntroText();
  }
  if (containerAssertive === null) {
    addContainer('assertive');
  }
  if (containerPolite === null) {
    addContainer('polite');
  }
}

/**
 * Run setup on domReady.
 */
external_wp_domReady_default()(setup);

/**
 * Allows you to easily announce dynamic interface updates to screen readers using ARIA live regions.
 * This module is inspired by the `speak` function in `wp-a11y.js`.
 *
 * @param {string} message    The message to be announced by assistive technologies.
 * @param {string} [ariaLive] The politeness level for aria-live; default: 'polite'.
 *
 * @example
 * ```js
 * import { speak } from '@wordpress/a11y';
 *
 * // For polite messages that shouldn't interrupt what screen readers are currently announcing.
 * speak( 'The message you want to send to the ARIA live region' );
 *
 * // For assertive messages that should interrupt what screen readers are currently announcing.
 * speak( 'The message you want to send to the ARIA live region', 'assertive' );
 * ```
 */
function speak(message, ariaLive) {
  /*
   * Clear previous messages to allow repeated strings being read out and hide
   * the explanatory text from assistive technologies.
   */
  clear();
  message = filterMessage(message);
  const introText = document.getElementById('a11y-speak-intro-text');
  const containerAssertive = document.getElementById('a11y-speak-assertive');
  const containerPolite = document.getElementById('a11y-speak-polite');
  if (containerAssertive && ariaLive === 'assertive') {
    containerAssertive.textContent = message;
  } else if (containerPolite) {
    containerPolite.textContent = message;
  }

  /*
   * Make the explanatory text available to assistive technologies by removing
   * the 'hidden' HTML attribute.
   */
  if (introText) {
    introText.removeAttribute('hidden');
  }
}

(window.wp = window.wp || {}).a11y = __webpack_exports__;
/******/ })()
;