Add HTML Elements to XUL Addons
I've been working on a new addon at Mozilla which isn't anywhere near finished so I wont bother telling you what it's meant to do...because it could change at any moment. Since this is my first real addon, it's been a struggle, but that's a good thing -- it means I'm learning a ton. One problem I ran into was trying to get a checkbox (INPUT) element within the addon via JavaScript -- nothing was displaying.
After a bit of research and guesswork, I figured out what I was doing wrong -- I was using the wrong document method to create the element:
var input = document.createElementNS("http://www.w3.org/1999/xhtml", "input");
Using document.createElementNS with the proper namespace resulted in my checkbox displaying in all of its glory. It's beautiful square, checked glory. Firefox addons can be created in a number of ways so if you're looking to create your own and you aren't seeing HTML elements correctly, keep this solution in mind!
![Responsive Images: The Ultimate Guide]()
Chances are that any Web designers using our Ghostlab browser testing app, which allows seamless testing across all devices simultaneously, will have worked with responsive design in some shape or form. And as today's websites and devices become ever more varied, a plethora of responsive images...
![Regular Expressions for the Rest of Us]()
Sooner or later you'll run across a regular expression. With their cryptic syntax, confusing documentation and massive learning curve, most developers settle for copying and pasting them from StackOverflow and hoping they work. But what if you could decode regular expressions and harness their power? In...
![Create a Quick MooTools Slideshow with Preloading Images]()
I've been creating a lot of slideshow posts lately. Why, you ask? Because they help me get chicks. A quick formula for you:
The following code snippet will show you how to create a simple slideshow with MooTools; the script will also...
![Introducing MooTools HeatMap]()
It's often interesting to think about where on a given element, whether it be the page, an image, or a static DIV, your users are clicking. With that curiosity in mind, I've created HeatMap: a MooTools class that allows you to detect, load, save, and...
Reminded me of my initial days with JavaScript David! I also made the same namespace errors and then wondered for hours, what went wrong!