---
title: Firebug
language: en
layout: default
created: 2008-12-22 14:58:35 +0100
updated: 2009-07-24 12:34:42 +0200
toc: false
tags:
  - know-how
  - development
  - firebug
---
Firebug is a useful Firefox extension to debug JavaScript and more. To not raise error messages on browsers without
Firebug, there's a small script called [firebugx.js](http://getfirebug.com/firebug/firebugx.js), which creates empty
functions. [Sascha Hameister](http://javascript.io/index.php?/archives/42-Kleiner-Performance-Patch-fuer-firebugx.js.html)
has optimized this script a little bit and it now looks like this:

{% highlight javascript %}
// FirebugX for browsers without Firebug
if (!window.console || !console.firebug) {
    var names = ["log", "debug", "info", "warn", "error", "assert", "dir", "dirxml", "trace",
                 "group", "groupCollapsed", "groupEnd", "time", "timeEnd", "profile", "profileEnd", "count"];

    var emptyFunction = function() {};

    window.console = {};
    for (var i = 0, count = names.length; i < count; ++i) {
        window.console[names[i]] = emptyFunction;
    }
}
{% endhighlight %}

You might also want to use [Firebug Lite](http://getfirebug.com/lite.html).