JavaScript定义方法的相关内容

问答 2018-05-10 来自：开发者社区

javascript有没有判断页面中是否定义了某个变量或者函数的方法？

文章 2016-06-07 来自：开发者社区

将近20年前，Javascript诞生的时候，只是一种简单的网页脚本语言。如果你忘了填写用户名，它就跳出一个警告。如今，它变得几乎无所不能，从前端到后端，有着各种匪夷所思的用途。程序员用它完成越来越庞大的项目。 Javascript代码的复杂度也直线上升。单个网页包含10000行Javascript代码，早就司空见惯。2010年，一个工程师透露，Gmail的代码长度是443000行！编写和维....

文章 2014-12-02 来自：开发者社区

Javascript定义类（class）的三种方法

文章 2010-02-28 来自：开发者社区

javascript中定义私有方法(private method)

一度以为在javascript的世界里，所有方法都是公有的，无法真正从技术上定义一个私有方法，今天又一次发现：其实我错了! var Person = function(name,sex){ this.name = name; this.sex = sex; var _privateVariable = "";//私有变量 //构造器中定义的方法，即为私有方法 function ...

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