JavaScript局部变量全局变量的相关内容

问答 2023-02-14 来自：开发者社区

JavaScript中局部变量与全局变量

我们知道，JavaScript的变量是松散型的变量，也就是说，其变量只需用var声明，其赋值的类型是不限定的。比如： 1 2 var person=18; person="zhuzhenwei"; 　  即先给person保存了一个number类型的值，之后还可以保存一个string类型的值，但是，这种做法是不推荐的。      甚至我们都可以直接...

文章 2017-03-31 来自：开发者社区

JS的局部变量和全局变量

两段JS代码的区别： <script type="text/javascript">   var a = "Hello";   function test(){        var a;        alert(a);&nb...

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更新时间 2023-05-04 12:06:56

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