javascript 如何调试 Firefox 扩展
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How to debug Firefox extension
提问by Alex K
I've been into Firefox extension development recently, and ran into some issues:
我最近一直在做 Firefox 扩展开发，遇到了一些问题：
So, in browser.xul i defined these lines:
所以，在 browser.xul 中我定义了这些行：
<overlay id="sample" xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul">
<script src="jquery.js" />
<script src="global.js" />
</overlay>
So, in global.js i have access to all jQuery stuff, and trying to load a simple script there:
因此，在 global.js 中，我可以访问所有 jQuery 内容，并尝试在那里加载一个简单的脚本：
var inner = null;
var o = function () {
var prefManager = Components.classes["@mozilla.org/preferences-service;1"].getService(Components.interfaces.nsIPrefBranch);
return {
init : function () {
alert('here loading inner..');
$.get('http://www.example.com/script.js', function(d) {
alert('loaded inner script!');
inner = d;
gBrowser.addEventListener("load", function () {
alert('onload');
}, false);
}).error(function(e) { alert('error loading inner..'); setTimeout(o.init,1000); });
$(this).ajaxError(function() { alert('ajaxError'); });
}
}
}
window.addEventListener("load", o.init, false);
But nor i receive a "loaded inner script", nor a "error loading inner" alert.. And i don't see the error console to log any errors from the extension... I assume the $.getis silently failing due to some restrictions maybe, but is there a proper way to debug the errors normally? The error console is silent for the extension, it only shows errors from the web pages
但是我也没有收到“加载的内部脚本”，也没有收到“错误加载内部”警报..而且我没有看到错误控制台来记录扩展中的任何错误......我认为$.get由于某些限制，它正在默默地失败也许，但是有没有一种正确的方法可以正常调试错误？扩展的错误控制台是静默的，它只显示来自网页的错误
采纳答案by Matthew Wilson
If you look at the article https://developer.mozilla.org/en/Setting_up_extension_development_environmentit suggests setting up some preferences, including
如果您查看文章https://developer.mozilla.org/en/Setting_up_extension_development_environment它建议设置一些首选项，包括
javascript.options.showInConsole= true. Logs errors in chrome files to the Error Console.
javascript.options.showInConsole= 真的。将 chrome 文件中的错误记录到错误控制台。
回答by Matthew Gertner
In general it can be problematic using JQuery in a XUL page since it assumes that the document is an HTMLDOM rather than an XMLDOM and that the windowis a HTMLwindow rather than a XULwindow. If I were you I'd use the subscript loaderfor this. To debug you can use Venkmanalthough it is a bit flakey and I often resort to just dump()statements to the console instead.
通常，在 XUL 页面中使用 JQuery 可能会出现问题，因为它假定文档是HTMLDOM 而不是XMLDOM，并且window是HTML窗口而不是XUL窗口。如果我是你，我会为此使用下标加载器。要调试，您可以使用Venkman，尽管它有点古怪，而且我经常只求助于dump()控制台的语句。
Update:see my comment below about the Browser Toolbox.
更新：请参阅下面关于Browser Toolbox 的评论。
