Javascript 什么是 .apply jQuery 函数？
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What's the .apply jQuery function?
提问by CRISHK Corporation
I see that in different plugins and codes, but I don't understand what does that function... In the jQuery api isn't referenced!
我在不同的插件和代码中看到了这一点，但我不明白那个功能是什么......在 jQuery api 中没有被引用！
回答by Amber
applycalls a function with a set of arguments. It's not part of jQuery, it's part of core Javascript. However, there is mention of it in the jQuery docs:
apply调用带有一组参数的函数。它不是 jQuery 的一部分，而是核心 Javascript 的一部分。但是，在 jQuery 文档中提到了它：
http://docs.jquery.com/Types#Context.2C_Call_and_Apply
http://docs.jquery.com/Types#Context.2C_Call_and_Apply
Syntax:
句法：
somefunction.apply(thisObj, [argsArray])
The above calls the function somefunction, setting thisto thisObjwithin the function's scope, and passing in the arguments from argsArrayas the arguments to the function.
以上调用 function somefunction，在函数的作用域内设置thisto thisObj，并将参数 fromargsArray作为参数传递给函数。
回答by issa marie tseng
Essentially, apply will call a function with the context being set to the object you apply the function to. This means that within the function, referencing thiswill refer to that object.
本质上，apply 将调用一个函数，并将上下文设置为您应用该函数的对象。这意味着在函数内，引用this将引用该对象。
