@wordpress/dom-ready/build/index.js

Execute callback after the DOM is loaded.

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = domReady;
/**
 * @typedef {() => void} Callback
 *
 * TODO: Remove this typedef and inline `() => void` type.
 *
 * This typedef is used so that a descriptive type is provided in our
 * automatically generated documentation.
 *
 * An in-line type `() => void` would be preferable, but the generated
 * documentation is `null` in that case.
 *
 * @see https://github.com/WordPress/gutenberg/issues/18045
 */

/**
 * Specify a function to execute when the DOM is fully loaded.
 *
 * @param {Callback} callback A function to execute after the DOM is ready.
 *
 * @example
 * ```js
 * import domReady from '@wordpress/dom-ready';
 *
 * domReady( function() {
 * 	//do something after DOM loads.
 * } );
 * ```
 *
 * @return {void}
 */
function domReady(callback) {
  if (typeof document === 'undefined') {
    return;
  }
  if (document.readyState === 'complete' ||
  // DOMContentLoaded + Images/Styles/etc loaded, so we call directly.
  document.readyState === 'interactive' // DOMContentLoaded fires at this point, so we call directly.
  ) {
    return void callback();
  }

  // DOMContentLoaded has not fired yet, delay callback until then.
  document.addEventListener('DOMContentLoaded', callback);
}
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