jQuery-何时使用"this"以及何时使用"$(this)"? [英] Jquery - When to use "this" and when to use "$(this)"?

问题描述

可能重复:
jQuery $(this)vs this

Possible Duplicate:
jQuery $(this) vs this

"this"和"$(this)"有什么区别?

What is the difference between "this" and "$(this)"?

我怎么知道要使用哪个?

How do I know which one to use?

相关，我认为:

每个都有可选参数. "i"与"this"(或"$(this)")有何不同?

With each, you have the optional parameters. How is the "i" different than "this" (or "$(this)")?

$('img').each(function(i) { ....code }

vs.

$('img').each(function() { ....code }

推荐答案

this对象不变.它是该函数的所有者.在大多数情况下，它只是一个节点，您可以引用其所有属性，例如this.className. (将其视为您使用document.getElementById所获得的节点或其他节点).它只是函数的所有者".

the this object doesn't change. It is the owner of the function. It is, in most cases like this, simply a node and you can reference all of its properties like this.className. (think of it as you would a node or whatnot that you get with document.getElementById). It is just the "owner" of the function.

因此，您只是将this对象传递给jQuery的$().

Therefore, you are just passing the this object to jQuery's $().

结论:如果要对当前节点使用jQuery函数，请使用$(this).但是，如果要访问对象自己的属性(例如.name，className，.id)，则只需使用this.

Conclusion: If you want to use jQuery functions for the current node, use $(this). But if you want to access the objects own properties (e.g. .name, className, .id), use simply this.

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