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首页 / 脚本样式 / JavaScript / javascript带回调函数的异步脚本载入方法实例分析

本文实例讲述了javascript带回调函数的异步脚本载入方法。分享给大家供大家参考。具体实现方法如下:
var Loader = function () { }Loader.prototype = {require: function (scripts, callback) {this.loadCount = 0;this.totalRequired = scripts.length;this.callback= callback;for (var i = 0; i < scripts.length; i++) {this.writeScript(scripts[i]);}},loaded: function (evt) {this.loadCount++;if (this.loadCount == this.totalRequired && typeof this.callback == "function") this.callback.call();},writeScript: function (src) {var self = this;var s = document.createElement("script");s.type = "text/javascript";s.async = true;s.src = src;s.addEventListener("load", function (e) { self.loaded(e); }, false);var head = document.getElementsByTagName("head")[0];head.appendChild(s);}}
用法演示
var l = new Loader();l.require(["example-script-1.js","example-script-2.js"],function() {// Callbackconsole.log("All Scripts Loaded");});
希望本文所述对大家的javascript程序设计有所帮助。