JavaScript全局变量的相关内容

文章 2016-03-01 来自：开发者社区

Javascript：谈谈JS的全局变量跟局部变量

[javascript] view plain copy <script type="text/javascript">    var a = "Hello";    function test(){     &nbs...

文章 2015-09-10 来自：开发者社区

如何检测 JavaScript 中的自定义全局变量

译者注: 全局变量的滥用是一种很糟糕的程序设计。很容易造成依赖和状态混乱。而在 Java 和 JavaScript 这种自动垃圾回收的语言里面，全局(可见的)变量一直是内存泄露的隐藏杀手。本文提供了一种靠谱的检测全局变量实现方式. 在 JavaScript中随意设置全局变量并不是个好习惯。原文作者参与了 MooTools 项目, 据他所说, 已经有十年时间天天听到与此相关的谈论...

文章 2014-12-21 来自：开发者社区

javascript 全局变量局部变量 var 与不加var的区别

一、外部的为全局，内部的为局部变量。二、加var为局部变量(在方法内)，不加var为全局变量(当方法内有一次使用后) <script type="text/javascript"> var golbe="global"; test(); function test(){ var local="local"; document.wri...

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