什么$（function（）{}）;做？ [英] What does $(function() {} ); do?

问题描述

有时我会创建一个函数并稍后调用该函数。

Sometimes I make a function and call the function later.

示例：

function example { alert('example'); }
example(); // <-- Then call it later

不知何故，某些函数无法调用。我必须在里面调用这些函数：

Somehow, some functions cannot be called. I have to call those functions inside:

$(function() { });

$（function（）{}）; 和（function（）{}）; 是什么意思，它们的区别/目的是什么？

What do $(function() {}); and (function() { }); mean, and what's the difference/purpose of these?

推荐答案

$(function() { ... });

只是jQuery的简写

is just jQuery short-hand for

$(document).ready(function() { ... });

它的设计（除其他事项外）确保在所有DOM之后调用您的函数页面的元素已经可以使用了。

What it's designed to do (amongst other things) is ensure that your function is called once all the DOM elements of the page are ready to be used.

但是，我认为这不是你遇到的问题 - 你能澄清你的意思'不知何故，有些函数是无法调用的，我必须在里面调用那些函数？
也许发布一些代码来显示哪些内容没有按预期工作？

However, I don't think that's the problem you're having - can you clarify what you mean by 'Somehow, some functions are cannot be called and I have to call those function inside' ? Maybe post some code to show what's not working as expected ?

编辑：重新阅读你的问题，可能是你的功能在页面之前运行已完成加载，因此无法正常执行;把它放在$（函数）中确实可以解决这个问题！

Re-reading your question, it could be that your function is running before the page has finished loaded, and therefore won't execute properly; putting it in $(function) would indeed fix that!

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