jQuery .each()此和元素 [英] jQuery .each() this and element

问题描述

在.each()回调内部，this与回调函数的第二个参数之间是否有区别?

Inside a .each() callback, is there any difference between this and the second argument of the callback function?

例如，在以下代码中:

$("example").each( function(index, element) {
    // body
});

this和element之间有什么区别吗?是否仅提供了第二个参数，以便您选择名称?

is there any difference between this and element? Is the second argument just provided so you can choose a name?

推荐答案

不，没有区别.第二个参数只是为了方便.

Nope, there's no difference; the second argument is just for convenience.

每次运行回调时，都会从0开始传递当前循环迭代.更重要的是，回调是在当前DOM元素的上下文中触发的，因此关键字this引用了该元素.

Each time the callback runs, it is passed the current loop iteration, beginning from 0. More importantly, the callback is fired in the context of the current DOM element, so the keyword this refers to the element.

来自 http://api.jquery.com/each/

第二个参数很可能与 jQuery.each 保持一致.

Most likely, the second argument is provided for consistency with jQuery.each.

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