Twitter does some great stuff with javascript. What I really appreciate about what they do is that there aren’t any epic JS functionalities — they’re all simple touches. One of those simple touches is the “Login” dropdown on their homepage. I’ve taken some time to duplicate that functionality with MooTools.

One thing I love doing is duplicating OS functionalities. One of the things your OS allows you to do easily is move from one item to another. Most of the time you’re simply trying to get to the next or the previous item. MooTools NextPrev is a compact javascript class that allows you to move about a collection of items quickly using human terms.

My journey into Dojo javascript has been exciting and I’m continuing to learn more as I port MooTools scripts to Dojo. My latest experiment is porting a simple new scroller from MooTools to Dojo. The code is very similar!

The HTML

	

		
News Item 1
Pellentesque habitant morbi...Read More
		
News Item 2
Pellentesque habitant morbi...Read More
		
	

The news items are placed into list items. The UL will be the element that’s animated.

In an effort to get better with the Dojo Toolkit, I’ve decided to port yet another one of my previous posts: Remove Broken Images Using MooTools or jQuery. Broken images are an eyesore to any website so there’s no point to keeping them in the page. Here’s how you can remove them on the client side.

The Dojo Javascript

dojo.ready(function() {
	dojo.query('img').forEach(function(img){
		dojo.connect(img,'onerror',function() {
			dojo.destroy(img);
		});
	});
});

Just as simple as jQuery and MooTools — just a different syntax!

In the past we’ve tinkered with link nudging with MooTools and link nudging with jQuery. In an effort to familiarize myself with other javascript frameworks, we’re going to try to duplicate that effect with another awesome framework: Dojo.

The Javascript: Attempt 1

dojo.addOnLoad(function() {
	var links = dojo.query('a.nudge');
	//foreach...
	dojo.forEach(links,function(link) {
		var left = dojo.style(link,'paddingLeft');
		dojo.connect(link,'onmouseenter',function() {
			dojo.animateProperty({
				node:link,
				properties: {
					paddingLeft: (left + 10)
				}
			}).play();
		});
		dojo.connect(link,'onmouseleave',function() {
			dojo.animateProperty({
				node:link,
				properties: {
					paddingLeft: left
				}
			}).play();
		});
	});
});

Once the DOM is ready, we use the dojo.query method to find all of the links to nudge. For every link we find, we record its original left padding and add mouseenter and mouseleave events to each link to animate its left padding.