Source: util/run_scripts_in_element.es.js

  1. /**
  2.  * Copyright (c) 2000-present Liferay, Inc. All rights reserved.
  3.  *
  4.  * This library is free software; you can redistribute it and/or modify it under
  5.  * the terms of the GNU Lesser General Public License as published by the Free
  6.  * Software Foundation; either version 2.1 of the License, or (at your option)
  7.  * any later version.
  8.  *
  9.  * This library is distributed in the hope that it will be useful, but WITHOUT
  10.  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
  11.  * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
  12.  * details.
  13.  */
  15. function runJSFromText(text, next, appendFn) {
  16. 	const scriptElement = document.createElement('script');
  18. 	scriptElement.text = text;
  20. 	if (appendFn) {
  21. 		appendFn(scriptElement);
  22. 	}
  23. 	else {
  24. 		document.head.appendChild(scriptElement);
  25. 	}
  27. 	scriptElement.remove();
  29. 	next();
  30. }
  32. function runJSFromFile(src, next, appendFn) {
  33. 	const scriptElement = document.createElement('script');
  35. 	scriptElement.src = src;
  37. 	const callback = function () {
  38. 		scriptElement.remove();
  40. 		next();
  41. 	};
  43. 	scriptElement.addEventListener('load', callback, {once: true});
  44. 	scriptElement.addEventListener('error', callback, {once: true});
  46. 	if (appendFn) {
  47. 		appendFn(scriptElement);
  48. 	}
  49. 	else {
  50. 		document.head.appendChild(scriptElement);
  51. 	}
  52. }
  54. function runScriptsInOrder(scripts, i, defaultFn, appendFn) {
  55. 	const scriptElement = scripts[i];
  57. 	const runNextScript = () => {
  58. 		if (i < scripts.length - 1) {
  59. 			runScriptsInOrder(scripts, i + 1, defaultFn, appendFn);
  60. 		}
  61. 		else if (defaultFn) {
  62. 			setTimeout(defaultFn);
  63. 		}
  64. 	};
  66. 	if (!scriptElement) {
  67. 		return;
  68. 	}
  69. 	else if (scriptElement.type && scriptElement.type !== 'text/javascript') {
  70. 		runNextScript();
  71. 	}
  72. 	else {
  73. 		scriptElement.remove();
  75. 		if (scriptElement.src) {
  76. 			runJSFromFile(scriptElement.src, runNextScript, appendFn);
  77. 		}
  78. 		else {
  79. 			runJSFromText(scriptElement.text, runNextScript, appendFn);
  80. 		}
  81. 	}
  82. }
  84. export default function (element, defaultFn, appendFn) {
  85. 	const scripts = element.querySelectorAll('script');
  87. 	if (!scripts.length && defaultFn) {
  88. 		setTimeout(defaultFn);
  90. 		return;
  91. 	}
  93. 	runScriptsInOrder(scripts, 0, defaultFn, appendFn);
  94. }