blocks|key|1998595|text|funcA几乎肯定是一个jQuery插件(或者是jQuery本身的一部分)。在你的情况下，我会做的第一件事就是在谷歌上搜索"jQuery+funcA“。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1998596|无论它是否实际上是jQuery的一部分，您都可以通过运行以下命令来查看该函数的源代码：|1998597|$('#search').funcA|code-block|syntax|javascript|1998598|在REPL中，例如浏览器的控制台，或者：|1998599|console.log(+$('#search').funcA+);|1998600|只要该函数的toString函数没有被覆盖，并且它不是对本机函数的引用。|1998601|entityMap^0|0|5|0|0|0|0|0|6|8|0^^$0|@$1|2|3|4|5|6|7|U|8|@$9|V|A|W|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|X|8|@]|D|@]|E|$]]|$1|H|3|I|5|J|7|Y|8|@]|D|@]|E|$K|L]]|$1|M|3|N|5|6|7|Z|8|@]|D|@]|E|$]]|$1|O|3|P|5|J|7|10|8|@]|D|@]|E|$K|L]]|$1|Q|3|R|5|6|7|11|8|@$9|12|A|13|B|C]]|D|@]|E|$]]|$1|S|3|-4|5|6|7|14|8|@]|D|@]|E|$]]]|T|$]]

<code>funcA</code> is almost certainly a jQuery plugin (or part of jQuery itself). The first thing I would try in your situation is searching for "jQuery funcA" on Google.

Whether or not it is actually part of jQuery, you can see the source for that function by running:

<pre><code>$('#search').funcA
</code></pre>

in a REPL, such as your browser's console, or:

<pre><code>console.log( $('#search').funcA );
</code></pre>

as long as the <code>toString</code> function for that function hasn't been overwritten and it is not a reference to a native function.

blocks|key|1595932|text|funcA似乎被定义为jQuery方法；请尝试|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1595933|console.log($.fn.funcA)|code-block|syntax|javascript|1595934|entityMap^0|0|5|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@$9|N|A|O|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|P|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|Q|8|@]|D|@]|E|$]]]|L|$]]

<code>funcA</code> appears to be defined as a jQuery method; try

<pre><code>console.log($.fn.funcA)
</code></pre>

blocks|key|4315145|text|在显示包含该代码的页面的浏览器窗口(我使用的是chrome)中打开javascript控制台。然后执行下面这行代码：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4315146|>+$('#search').funcA|code-block|syntax|javascript|4315147|您应该看到funcA的主体。当我执行$(“#myownid”).show时，随机示例输出：|offset|length|style|CODE|4315148|4315149|函数funcA+(a，b，c){var+d，e;if(a%7C%7Ca===0)return+this.animate(cu("show",3)，a，b，c);for(var+g=0，h=this.length;g+...|blockquote|4315150|4315151|4315152|如果你设法看到函数的主体，你应该能够推断出可能的源代码(或者在这里发布它们，我们应该能够进一步指出你)|4315153|entityMap^0|0|0|5|5|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|W|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|X|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|Y|8|@$I|Z|J|10|K|L]]|9|@]|A|$]]|$1|M|3|-4|5|6|7|11|8|@]|9|@]|A|$]]|$1|N|3|O|5|P|7|12|8|@]|9|@]|A|$]]|$1|Q|3|-4|5|6|7|13|8|@]|9|@]|A|$]]|$1|R|3|-4|5|6|7|14|8|@]|9|@]|A|$]]|$1|S|3|T|5|6|7|15|8|@]|9|@]|A|$]]|$1|U|3|-4|5|6|7|16|8|@]|9|@]|A|$]]]|V|$]]

Open javascript console in the same browser window (I used chrome) that is displaying the page that contains that code. Then just execute this line:

<pre><code>&gt; $('#search').funcA
</code></pre>

You should see the body of <code>funcA</code>. Random example output when I did $("#myownid").show: 

<blockquote>
 function funcA (a,b,c){var d,e;if(a||a===0)return
 this.animate(cu("show",3),a,b,c);for(var
 g=0,h=this.length;g
 ...
</blockquote>

If you manage to see the body of the function, you should be able to infer likely sources (or post them here and we should be able to point you further)

blocks|key|5783697|text|这里的console.log建议很好地使用了Function.prototype.toString++(在某些浏览器中还使用了一些控制台的魔力)，但我还是使用debugger。Chrome有非常好的调试工具来处理这类事情，而debugger+statement会让你轻松地实现这一点。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|5783698|+var+test+=+$('#search').funcA;
+debugger;|code-block|syntax|javascript|5783699|打开控制台，开始调查。当您的代码执行到达该断点时，您将看到像这样的方便工具|5783700|​|5783701|📷|atomic|5783702|5783703|右键单击test还会显示“显示函数定义”的选项，该选项将显示函数被实际定义为源代码的位置。|5783704|如果您想从那里进一步研究，您可以随时设置类似的断点right+from+the+Chrome+dev+console。|5783705|entityMap|0|LINK|mutability|MUTABLE|url|https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function/toString|1|https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/debugger|2|IMAGE|IMMUTABLE|imageUrl|https://ask.qcloudimg.com/http-save/yehe-900000/8a949754f1bce15c1662d57507a2804b.png|imageAlt|3|https://developers.google.com/web/tools/chrome-devtools/debug/breakpoints/add-breakpoints#add-a-manual-breakpoint-on-a-single-line-of-code^0|3|B|27|8|M|S|0|34|I|1|0|0|0|0|0|1|2|0|0|4|4|0|P|X|3|0^^$0|@$1|2|3|4|5|6|7|1E|8|@$9|1F|A|1G|B|C]|$9|1H|A|1I|B|C]]|D|@$9|1J|A|1K|1|1L]|$9|1M|A|1N|1|1O]]|E|$]]|$1|F|3|G|5|H|7|1P|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|1Q|8|@]|D|@]|E|$]]|$1|M|3|N|5|6|7|1R|8|@]|D|@]|E|$]]|$1|O|3|P|5|Q|7|1S|8|@]|D|@$9|1T|A|1U|1|1V]]|E|$]]|$1|R|3|N|5|6|7|1W|8|@]|D|@]|E|$]]|$1|S|3|T|5|6|7|1X|8|@$9|1Y|A|1Z|B|C]]|D|@]|E|$]]|$1|U|3|V|5|6|7|20|8|@]|D|@$9|21|A|22|1|23]]|E|$]]|$1|W|3|-4|5|6|7|24|8|@]|D|@]|E|$]]]|X|$Y|$5|Z|10|11|E|$12|13]]|14|$5|Z|10|11|E|$12|15]]|16|$5|17|10|18|E|$19|1A|1B|-4]]|1C|$5|Z|10|11|E|$12|1D]]]]

The <code>console.log</code> suggestions here are nice use of <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function/toString" rel="nofollow noreferrer">Function.prototype.toString </a> (and in some browsers some console magic), but I'd use <code>debugger</code> instead. Chrome has quite nice debugging tools for stuff like this and the <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/debugger" rel="nofollow noreferrer">debugger statement</a> will get you there with ease. 

<pre><code> var test = $('#search').funcA;
 debugger;
</code></pre>

Open the console and start investigating. When the execution of your code hits that breakpoint, you'll see handy tools like this

<a href="https://i.stack.imgur.com/wUjQo.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/wUjQo.png" alt="enter image description here"></a>

Right-clicking <code>test</code> there should also give you the option to "Show function definition" which will show you where the function was actually defined as source code.

And if you want to investigate even further from there, you can always set similar breakpoints <a href="https://developers.google.com/web/tools/chrome-devtools/debug/breakpoints/add-breakpoints#add-a-manual-breakpoint-on-a-single-line-of-code" rel="nofollow noreferrer">right from the Chrome dev console</a>.

blocks|key|5783730|text|简而言之:打开控制台并运行$("#+search+")，它将返回一个jquery对象，其中包含一个id为search的dom节点。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|5783731|长版本：|5783732|$("something")是jquery+(一个java脚本库)，用于通过css选择器返回一个jquery对象来选择元素。https://learn.jquery.com/using-jquery-core/selecting-elements/|offset|length|5783733|$(+document+).ready(+function+()+{是jquery，当我的文档(基本上是页面)准备好让我处理时，运行这个匿名函数。https://learn.jquery.com/using-jquery-core/document-ready/|5783734|$('#search').funcA()；选择一组元素，在本例中是id为"search“的单个元素，然后使用该元素作为作用域对每个元素运行funcA。因此，它将在ID为“funcA”的元素上运行搜索，其中搜索节点是特殊作用域变量的值(作用域是通过关键字"this“引用的，它可能会变得相当复杂)。|5783735|因此，本质上，您所看到的是:当我的文档准备好时，找到搜索元素并在其上运行我的函数funcA。|5783736|entityMap|0|LINK|mutability|MUTABLE|url|https://learn.jquery.com/using-jquery-core/selecting-elements/|1|https://learn.jquery.com/using-jquery-core/document-ready/^0|0|0|1Q|1Q|0|0|21|1M|1|0|0|0^^$0|@$1|2|3|4|5|6|7|X|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|Y|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|Z|8|@]|9|@$F|10|G|11|1|12]]|A|$]]|$1|H|3|I|5|6|7|13|8|@]|9|@$F|14|G|15|1|16]]|A|$]]|$1|J|3|K|5|6|7|17|8|@]|9|@]|A|$]]|$1|L|3|M|5|6|7|18|8|@]|9|@]|A|$]]|$1|N|3|-4|5|6|7|19|8|@]|9|@]|A|$]]]|O|$P|$5|Q|R|S|A|$T|U]]|V|$5|Q|R|S|A|$T|W]]]]

Short version: Open the console and run $("#search") it will return a jquery object containing the dom node that has an id of search.

Long version:

$("something") 
Is jquery (a java script library) for select elements by css selector returning a jquery object. 
<a href="https://learn.jquery.com/using-jquery-core/selecting-elements/" rel="nofollow">https://learn.jquery.com/using-jquery-core/selecting-elements/</a>

$(document).ready(function() {
Is jquery for when my document (basically the page) is ready for me to muck with run this anonymous function.
<a href="https://learn.jquery.com/using-jquery-core/document-ready/" rel="nofollow">https://learn.jquery.com/using-jquery-core/document-ready/</a>

$('#search').funcA();
Selects a set of elements, in this case the single element with id "search" and then run funcA on each of them using the element as the scope. So it would run funcA on the element with ID "search" with the search node being the value of the special scope variable (scope is referenced through the key word "this", it can get rather complex).

So in essence what your seeing is:
When my document is ready find the search element and run my function funcA on it.

This is one of the first time's I'm looking at javascript, so please excuse the newbish question.

I'm trying to read the code for a specific function on a website that is of interest to me. I didn't write anything for the website, so cannot really comment on the general structure. This is almost like reverse engineering. Where it's called (in a js/main.js) looks like:

<pre><code>$(document).ready(function() {
 $('#search').funcA();
</code></pre>

From what I understand this is saying from the file/class or whatever that comesf rom the id search, call funcA. My questions is: how do I see the file that is called with #search?

Javascript: finding a function's code

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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这是我第一次看到javascript，所以请原谅这个新手的问题。我正在尝试阅读我感兴趣的网站上特定函数的代码。我没有为网站写任何东西，所以不能真的对总体结构发表评论。这几乎就像是逆向工程。它的调用位置(在js/main.js中)如下所示：$(document).ready(function() {  $('#search').funcA();据我所知，这是从文件/类或任何来自id搜索的东西中说的，

问Javascript:查找函数的代码
EN

回答 5

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