firebug | 易学教程

How to use jQuery to log values to Firebug Console?

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问题 I just wonder if there is a way to use jQuery to log some variable values to Firebug console for debugging purpose? 回答1: jQuery is just a library for JavaScript, so you can just use the console.log() function: console.log(myVar); 回答2: (function($) { $.log = function() { if( 'console' in window ) console.log.apply(null, arguments); }; }(jQuery)); $.log("hello world, I'm just kidding with this answer, please upvote it anyway!"); $.log("You should really just call console.log() directly"); $.log

Firebug: Inspect POST from webpage

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问题 Can I use Firebug to inspect a post request sent by a webpage to a server and if so how? I am refering inspecting a regular POST made using a form, but would also be interested in knowing how to inspect posts using javascript. Thanks 回答1: Of course you can do that. The Net panel allows you to expand every request related to a website. For a POST done via AJAX you can set the XHR filter to see only those requests. If you expand a request by clicking on it, you'll get all the information

Why is document.getelementbyId not working in Firefox?

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问题 I can't figure out why document.getElementById is not working in Firefox: document.getElementById("main").style.width = "100"; When I check in Firebug it says: TypeError: document.getElementById("main") is null Does anybody know why this is happening? EDIT: Unfortunately, the "body" element was a bad example. I changed it to another element with an id of "main". 回答1: Did you set the id of the <body> element to "body": <body id="body" ...> Update: Check if the following example works for you:

Detect errors on web page with Firebug

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问题 What is the best way to check our web applications for errors such as "duplicate attribute"? My development team tends to use Firefox and Firebug for web development. We've noticed some errors creeping into the codebase, usually duplicate attributes such as: <div id="MyDiv" class="hide" class="interestingDiv"> We see no errors in Firebug's console nor can see anyway to get Firebug to report that there are errors. We have noticed that Firefox itself IS aware of these errors. By clicking on

Css - Expanded shorthand properties - What is border-left-color-ltr-source:physical

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问题 Introduction When clicking on the css tab on Firebug, there is an option available called " Expand Shorthand Properties "! A typical css rule like the following: border-left:2px solid #7FA100; ..is converted into the "Expanded" version like so: border-left-color-ltr-source:physical; border-left-color-rtl-source:physical; border-left-color-value:#7FA100; border-left-style-ltr-source:physical; border-left-style-rtl-source:physical; border-left-style-value:solid; border-left-width-ltr-source

如何测量函数执行所需的时间

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【推荐】2019 Java 开发者跳槽指南.pdf(吐血整理) >>> 我需要获取执行时间（以毫秒为单位）。我最初是在2008年问这个问题的。当时接受的答案是使用 new Date（）。getTime（）。但是，我们现在都同意使用标准 performance.now（） API更合适。因此，我正在改变对此的公认答案。 #1楼不要使用Date（）。参见下文。使用 performance.now() ： <script> var a = performance.now(); alert('do something...'); var b = performance.now(); alert('It took ' + (b - a) + ' ms.'); </script> 它适用于： IE 10 ++ 火狐15 ++ 铬24 ++ Safari 8 ++ Opera 15 ++ Android 4.4 ++ 等等 console.time 对您来说可能是可行的，但这是非标准的 § ：此功能是非标准的，不在标准轨道上。请勿在面向Web的生产站点上使用它：它不适用于每个用户。实现之间也可能存在很大的不兼容性，并且将来的行为可能会更改。除了浏览器支持， performance.now 似乎因为它似乎是的裸机版本，必须提供更准确的计时的潜力 console

Weird browser / ajax error : Extra junk appears at the end of javascript files in firefox

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问题 This is a weird one. We're writing a Django application with some rich javascript UI, using both Yahoo YUI and jQuery. Our main page template now includes a fair number of js files. And we're starting to see a strange error in Firefox (3 and 3.5) . Sometimes the javascript crashes. And inspecting in Firebug we see that a syntax error occurred in one of the YUI .js files. When we look at the line in Firebug, we see that it's actually a line that doesn't exist in the original file, but seems to

jQuery function .load() doesn't work

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问题 i have a problem. It's not the first time i use this jQuery function ( .load() ) that way, but now, i really can't understand why in this new web site, it's not working. In the Firebug Console, when i click on the link "connexion" the GET is in red and the 'form.login.php' is not loaded at all. Why? ah by the way, on document ready, the loading of 'form.accueil.php' is working. But not the other .load call. Here is a piece of my code. Thanks in advance.  <script type="text

Steps to troubleshoot CSS problems

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问题 I've got a rather minor CSS problem, so particular to my site that googling for it doesn't return anything useful. (I might as well google "why isn't my CSS working?" for as easy to describe as the problem is.) I've thought of a couple ways to troubleshoot the issue so far, including: CSS and HTML validators and linters tweaking around in Firebug for hours pasting code in an IDE to make sure parens, [] 's and {} 's match looking at diffs of old code (some of which worked) with newer code

Firebug debugger not working in Firefox 3.x?

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问题 I have been using Firebug for a while now and for the past month I can't get the JavaScript debugger to work. I mean, it will work sometimes, but it does random things 80% of the time. I don't think that it's just me because a friend of mine have the same problem. I've googled the issue, and I can't manage to find an interesting answer. Same on http://getfirebug.com/. Right now, I have the latest version of Firefox 3 on Windows XP and the latest of Firebug, but it has not been working since