$ .proxy()和bind()有什么区别? [英] What is the difference between $.proxy() and bind()?

问题描述

2009年，ECMAScript 5添加了内置的bind()函数，该函数将对象作为参数并返回相同的函数，其中this将始终引用传递给它的对象. (我找不到任何看起来像是规范文档链接的东西.)

In 2009, ECMAScript 5 added a built-in bind() function which takes an object as a parameter and returns an identical function in which this will always refer to the object you passed it. (I couldn't find anything that looked like a canonical documentation link.)

这与 jQuery的$.proxy()函数有何不同? $.proxy()在ECMAScript 5发布之前是否先出现?是否有特别的理由要使$.proxy(function(){}, this)胜于function(){}.bind(this)?

How is this different from jQuery's $.proxy() function? Did $.proxy() come first before ECMAScript 5 was released? Is there a particular reason to favor $.proxy(function(){}, this) over function(){}.bind(this)?

推荐答案

proxy首先出现，您可能更喜欢bind，因为它是标准.它们的调用方式略有不同(由于被附加到Function.prototype而不是仅仅作为一个函数)，但是它们的行为是相同的.

proxy came first and you should likely favor bind as it is a standard. The way they are called varies slightly (due to being attached to Function.prototype vs just being a function) but their behavior is the same.

这里有一个很好的帖子: jQuery.proxy()用法，以该结尾建议.

There is a pretty good post here: jQuery.proxy() usage, that ends with that advice.

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