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优雅的类写法
source link: https://juejin.im/post/5b50c8b76fb9a04fd3439215
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前言 虽然现在已经是ES6的时代，但是，还是有必要了解下ES5是怎么写一个类的。 本文详述JavaScript面向对象编程中的类写法，并分步骤讲述如何写出优雅的类。 一、例子 例子为一个轻提示组件Toast。 需要实现的功能： on方法，显示提示 off方法
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