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LoadScript

一个用于按顺序加载外部js的脚本的库

此脚本不应直接安装。它是供其他脚本使用的外部库，要使用该库请加入元指令 // @require https://update.cn-greasyfork.org/scripts/10108/54092/LoadScript.js 

  1. // ==UserScript==
  2. // @name        LoadScript
  3. // @namespace   brambles
  4. // @version     1.2
  5. // @grant       none
  6. // ==/UserScript==
  7.   var LoadScript = function LoadScript(urls, callback) {
  8.     var _loadScript = arguments.callee;
  9.     var head = document.head;
  10.     var script = document.createElement('script');
  11.     script.type = 'text/javascript';
  12.     script.async = 'true';
  13.     script.className = 'loadscript';
  14.     script.setAttribute('charset', 'utf-8');
  15.  
  16.     if (typeof urls === 'string') {
  17.       var urls = [
  18.         urls
  19.       ];
  20.     }
  21.     if (!Array.isArray(urls)) {
  22.       throw 'type error';
  23.     }
  24.     if (urls.length > 1) {
  25.       script.onload = script.onerror = function () {
  26.         script.onload = script.onerror = null;
  27.         _loadScript(urls.slice(1), callback);
  28.         
  29.       };
  30.     } 
  31.     else {
  32.       script.onload = script.onerror = function(){
  33.           script.onload = script.onerror = null;
  34.           callback();
  35.       };
  36.     }
  37.     script.src = urls[0];
  38.     head.insertBefore(script, head.firstChild);
  39.   };