JavaScript场景call 的相关内容

文章 2024-09-27 来自：开发者社区

JS中this的应用场景，再了解下apply、call和bind！

在写程序时，我们都知道this很好用，但是却很容易导致乱用。就像我刚开始学习箭头函数时，我知道这个箭头指代的是this，但是却不知道它往哪里指，所以在写程序时，就会想当然的乱写，导致有时候因为一个数据获取不到而疯狂找错，这无形之中要增加很大的时间成本，不懂原理胡来总是很容...

文章 2022-06-13 来自：开发者社区

JS中this的应用场景，再了解下apply、call和bind！

一、谈谈对this对象的理解this ，函数执行的上下文，总是指向函数的直接调用者（而非间接调用者），可以通过 apply ， call ， bind 改变 this 的指向。如果有 new 关键字，this 指向 new 出来的那个对象。在事件中，this 指向触发这个事件的对象，特殊的是，IE 中的 attachEvent 中的 this 总是指向全局对象 window 。对于匿名函数或者直....

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更新时间 2024-09-28 12:15:48

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