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Friday, March 30 2007

Firebug: XHR prototype overloading failure

By Romain on Friday, March 30 2007, 12:48 UTC - Tech

I love firebug, this is something really good for developing web apps. But today, I got an issue which was pretty annoying! First of all, when I develop a small apps, I used to do this under firefox only with firebug and other nice extension loaded.
But today I got an issue when I wanted to overload the XMLHttpRequest send function to do other things with: Firebug simply do not allow me to do this, but it works well if I want to overload the 'open' function!

Pretty annoying but you cannot do this with firebug activated:

XMLHttpRequest.prototype.send = function(data) {
    sData = transformation(data);
    this.originalSend(sData);
}

Wednesday, February 28 2007

Firefox2 and the Weird JavaScript Events...

By Romain on Wednesday, February 28 2007, 13:47 UTC - Tech

For almost a week, I've been working with zeno, wisec and others on JavaScript events and HTML Tags; what event can be executed in what tag...
The testing is definitely not finished but I was implementing a JavaScript Unit Testing based test bed for keeping everybody out of clicking on 8700 testcases * nb_browsers...

Anyway, the method I use is to fire a JavaScript event on the load of the document to verify if it works (the information are gathering by the JSUnit Framework).
So, the funny part in firefox is that I can fire almost every event in every tag; you can find an example here where I do something like that:

<acronym onsubmit="alert('TEST')">test</acronym>

The equivalent Internet Explorer version can be find here (it works well... ie does nothing).

I didn't really take the time to think about this but I'm sure something can come from this...

Edit: Wisec found that under firefox you can also fire every events on unexisting tags such as:

<unex ondblclick="alert('TEST')">test</unex >

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