Prevent Default Event Actions Using MooTools 1.2

By  on  

Many sweet JavaScript events are trigger by clicking on a link or a submit button. What if you don't want the browser to follow the link? What if you don't want the form to be submitted traditionally? MooTools allows you to prevent the default actions of most elements by using the preventDefault() method.

The Sample XHTML

<p><a href="http://scriptandstyle.com" class="prevent">ScriptAndStyle.com</a></p>
<p><input type="checkbox" class="prevent" /></p>
<p><input type="submit" class="prevent" value="Submit Form" /></p>

The action of any element with the prevent class will be nullified upon click.

The MooTools 1.2 Code

window.addEvent('domready', function() {
	$each($$('.prevent'),function(el) {
		el.addEvent('click',function(event) {
			event.preventDefault();
		});
	});
});

You can also prevent the browser from allowing image dragging! I did, however, notice that this function did not work correctly on a radio input.

Recent Features

  • By
    5 HTML5 APIs You Didn&#8217;t Know Existed

    When you say or read "HTML5", you half expect exotic dancers and unicorns to walk into the room to the tune of "I'm Sexy and I Know It."  Can you blame us though?  We watched the fundamental APIs stagnate for so long that a basic feature...

  • By
    I&#8217;m an Impostor

    This is the hardest thing I've ever had to write, much less admit to myself.  I've written resignation letters from jobs I've loved, I've ended relationships, I've failed at a host of tasks, and let myself down in my life.  All of those feelings were very...

Incredible Demos

  • By
    Unicode CSS Classes

    CSS class name structure and consistency is really important; some developers camelcase classnames, others use dashes, and others use underscores.  One thing I've learned when toying around by HTML and CSS class names is that you can actually use unicode symbols and icons as classnames.

  • By
    PHP Woot Checker &#8211; Tech, Wine, and Shirt Woot

    If you haven't heard of Woot.com, you've been living under a rock. For those who have been under the proverbial rock, here's the plot: Every day, Woot sells one product. Once the item is sold out, no more items are available for purchase. You don't know how many...

Discussion

  1. thomasd

    You can use the $lambda function and a little bit of the Elements-Class magic to make this a one-liner:

    window.addEvent('domready', function() {
           //Now every click on one of the .prevent-Elements returns a 'false' and the propagation of the event gets stopped.
        $$('.prevent').addEvent('click',$lambda(false));
    });
    
  2. @thomasd: Sweet tip!

  3. asdf123

    i found that the method that fails the least is:

    $("bla").addEvent('click',function(_e){
    
    new Event(_e).preventDefault().stopPropagation();
    
    
    //alternatively:
    
    new Event(_e).stop();
    
    //or very simple in mootools 1.2:
    
    return false;
    
    })
    

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