Create a Custom “:checked” Pseudo Selector for MooTools 1.2

By  on  

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?

Recent Features

  • By
    From Webcam to Animated GIF: the Secret Behind chat.meatspac.es!

    My team mate Edna Piranha is not only an awesome hacker; she's also a fantastic philosopher! Communication and online interactions is a subject that has kept her mind busy for a long time, and it has also resulted in a bunch of interesting experimental projects...

  • By
    7 Essential JavaScript Functions

    I remember the early days of JavaScript where you needed a simple function for just about everything because the browser vendors implemented features differently, and not just edge features, basic features, like addEventListener and attachEvent.  Times have changed but there are still a few functions each developer should...

Incredible Demos

  • By
    Digg-Style Dynamic Share Widget Using the Dojo Toolkit

    I've always seen Digg as a very progressive website. Digg uses experimental, ajaxified methods for comments and mission-critical functions. One nice touch Digg has added to their website is their hover share widget. Here's how to implement that functionality on your site...

  • By
    9 Mind-Blowing WebGL Demos

    As much as developers now loathe Flash, we're still playing a bit of catch up to natively duplicate the animation capabilities that Adobe's old technology provided us.  Of course we have canvas, an awesome technology, one which I highlighted 9 mind-blowing demos.  Another technology available...

Discussion

  1. thomasd

    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.

  2. @thomasd: I like your “novalue” pseudo selector. As for your question, try this:

    input[value=”]

  3. Marcelo

    David, your blog is the best, ever!

    I love your articles, and I always use your tips.

    hugs

  4. thomasd

    @david: input[value=”] doesn’t work.
    But the pseudo selector works quite well.

    I really love mootools and the way it works!

  5. Just a note though, :checked is already in Mootools Selectors source. http://tr.im/1n83

  6. @Lim Chee Aun: Cool! It’s not in 1.2 so this must be new.

  7. Jon Bomgardner

    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

Wrap your code in <pre class="{language}"></pre> tags, link to a GitHub gist, JSFiddle fiddle, or CodePen pen to embed!