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?

Raygun Pulse

Recent Features

Incredible Demos

  • By
    CSS Vertical Centering

    Front-end developing is beautiful, and it's getting prettier by the day. Nowadays we got so many concepts, methodologies, good practices and whatnot to make our work stand out from the rest. Javascript (along with its countless third party libraries) and CSS have grown so big, helping...

  • By
    iPhone Checkboxes Using MooTools

    One of the sweet user interface enhancements provided by Apple's iPhone is their checkbox-slider functionality. Thomas Reynolds recently released a jQuery plugin that allows you to make your checkboxes look like iPhone sliders. Here's how to implement that functionality using the beloved...

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!