如何在浏览器源代码中找到JS函数声明? [英] How to find a JS function declaration in browser sources?

问题描述

如何在FF的源代码中找到JS函数声明?

How do I find a JS function declaration in the sources of FF ?

首先，我想查找函数"copy"的声明.我打开控制台，键入并执行"copy.toSource()"，输出显示它是本机代码.我查看了此问题页面，然后点击了链接，下载了源代码，并认为我只会搜索"copy"一词，但搜索结果非常庞大，大约有17,000条条目，我无法在此处找到"copy"声明)

First I wanted to find declaration of function "copy". I opened console, typed and executed 'copy.toSource()', the output said it is the native code. I looked this question page, followed link, downloaded sources and I thought I'll just search for word 'copy' but search results were colossal, there were about 17k entries, there's no way I can find 'copy' declaration here)

有什么想法如何在要搜索的目录中找到复制"声明?

Any ideas how to find 'copy' declaration, in which directory to search?

PS:还要看看所有其他功能，例如'console.log'，也会很有趣.如果您知道如何找到它的声明，那就太棒了.

PS: it would be interesting to look at all other functions too, for example 'console.log'. If you know how to find it's declaration, it will be awesome.

推荐答案

copy的来源(假设您的意思是复制到剪贴板")在./toolkit/devtools/webconsole/utils.js中.它很小，所以在这里:

The source of copy (assuming you mean "copy to clipboard") is in ./toolkit/devtools/webconsole/utils.js. It is small, so here it is:

WebConsoleCommands._registerOriginal("copy", function JSTH_copy(aOwner, aValue)
{
  let payload;
  try {
    if (aValue instanceof Ci.nsIDOMElement) {
      payload = aValue.outerHTML;
    } else if (typeof aValue == "string") {
      payload = aValue;
    } else {
      payload = JSON.stringify(aValue, null, "  ");
    }
  } catch (ex) {
    payload = "/* " + ex  + " */";
  }
  aOwner.helperResult = {
    type: "copyValueToClipboard",
    value: payload,
  };
});

console.*函数在./dom/base/Console.cpp

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