JavaScript原型定义的相关内容

文章 2024-03-13 来自：开发者社区

JS数组增删方法的原理，使用原型定义

大家有没有想过，数组有增删的方法，那实现的原理是什么？我们可以自己定义方法去实现增删数组吗？让我为大家介绍一下吧！利用数组的原型对象，让所有数组都可以使用这个方法 1.实现pop( )方法，删除数组最后一个元素 Array.prototype.pops = funct...

问答 2016-06-21 来自：开发者社区

js里面为什么要在实例替换原型后才能定义方法？

如图所示，不可以在SubType.prototype=new SuperType();之前定义SubType.prototype.getSubValue=function(){};吗？这两个不都是要到SubType的原型里面查找吗？小白一枚，求教~

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更新时间 2024-03-14 12:47:29

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