JavaScript学习笔记内置对象的相关内容

文章 2023-01-18 来自：开发者社区

JavaScript学习笔记（二），js内置对象，Dom操作和Bom操作

6、 js内置的对象6.1 数组 <script type="text/javascript"> //声明出数组，并附上初始值 //var arr=[1,2,3]; var arr=new Array(); //js的长度可以变化，把4放入到数组里面。 arr.push(4); arr[1]=1; /*for(var i=0;...

文章 2022-10-23 来自：开发者社区

JavaScript学习笔记 09、面向对象—内置对象

一、包装类包装类：Number、String、Boolean。目的：为了让基本类型可以从他们的构造函数中的prototype上获得方法。1、包装类Number、String、Boolean是对基本类型number、string、boolean的包装类，它们的类型都是Object。2、在包装类中都有一个PrimitiveValue即默认值（该默认值无法访问），包装类实际都是通过该默认值来创建的对象....

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更新时间 2024-02-11 09:23:00

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