Create a Custom “:checked” Pseudo Selector for MooTools 1.2
A few weeks back, I showed you how to create a custom ":selected" pseudo selector for use in MooTools. It was just a small snippet but I've found it incredibly useful, as has been the ":checked" pseudo selector I've been using.
The XHTML
<input type="checkbox" name="mycheckbox" value="1" checked="checked" />
<input type="radio" name="mycheckbox" value="1" checked />
Above are examples of checked elements.
The MooTools JavaScript
Selectors.Pseudo.checked = function(){
return ('input' == this.get('tag') && ('radio' == this.get('type') || 'checkbox' == this.get('type')) && this.checked);
};
Of course, you could always try to retrieve checked elements using "input[checked=checked]," but that code is case-sensitive and may not always return checked elements. What other pseudo selectors may be useful for MooTools?
![CSS @supports]()
Feature detection via JavaScript is a client side best practice and for all the right reasons, but unfortunately that same functionality hasn't been available within CSS. What we end up doing is repeating the same properties multiple times with each browser prefix. Yuck. Another thing we...
![9 More Mind-Blowing WebGL Demos]()
With Firefox OS, asm.js, and the push for browser performance improvements, canvas and WebGL technologies are opening a world of possibilities. I featured 9 Mind-Blowing Canvas Demos and then took it up a level with 9 Mind-Blowing WebGL Demos, but I want to outdo...
![Record Text Selections Using MooTools or jQuery AJAX]()
One technique I'm seeing more and more these days (CNNSI.com, for example) is AJAX recording of selected text. It makes sense -- if you detect users selecting the terms over and over again, you can probably assume your visitors are searching that term on Google...
![PHP IMDB Scraper]()
It's been quite a while since I've written a PHP grabber and the itch finally got to me. This time the victim is the International Movie Database, otherwise known as IMDB. IMDB has info on every movie ever made (or so it seems). Their...
One time I needed an empty value selector for input elements:
Selectors.Pseudo.novalue = function(){ return (this.tagName.toLowerCase() == 'input' && this.value === ''); };Or is there a way to test an empty attribute with CSS-Selectors, something like “input[value=]”? That didn’t worked in my case.
@thomasd: I like your “novalue” pseudo selector. As for your question, try this:
input[value=”]
David, your blog is the best, ever!
I love your articles, and I always use your tips.
hugs
@david: input[value=”] doesn’t work.
But the pseudo selector works quite well.
I really love mootools and the way it works!
Just a note though, :checked is already in Mootools Selectors source. http://tr.im/1n83
@Lim Chee Aun: Cool! It’s not in 1.2 so this must be new.
I know this entry is a tad old but I was wondering if this was tested in IE8? I’m using it in a project and in the one place I use this selector IE8 has fits. Problem is I can’t see anything there that would cause it….
Your thoughts??
Jon