Create Twitter-Style Buttons with the Dojo Toolkit

By  on  

I love that JavaScript toolkits make enhancing web pages incredibly easy. Today I'll cover an effect that I've already coded with MooTools: creating a Twitter-style animated "Sign In" button. Check out this five minute tutorial so you can take your static buttons to the next level!

The HTML

<!-- left version -->
<div class="button_wrap">
    <a class="button_aLeft" id="button_aLeft"><span>Use your Twitter ID</span></a>
    <a class="button_bLeft slidebttn" id="button_bLeft">Sign <span>in</span></a>
</div>
<!-- right version -->
<div class="button_wrap">

    <a class="button_aRight" id="button_aRight"><span>Use your Twitter ID</span></a>
    <a class="button_bRight slidebttn" id="button_bRight">Sign <span>in</span></a>
</div>

The "button" consists of one DIV with two sets SPANs wrapped by A elements.

The CSS

.button_wrap{ position:relative; width:225px; height:36px; overflow:hidden; font-weight:bold; font-size:11px; margin:10px; }
.button_aLeft{ width:70px; height:36px; -moz-border-radius:20px; -webkit-border-radius:20px; background-color:#093d6f; color:#fff; top:0px; right:0px; position:absolute; line-height:36px; text-align:left; }
.button_aLeft span{ z-index:200; padding-left:20px; color:#fff; }
.button_aRight{ width:70px; height:36px; -moz-border-radius:20px; -webkit-border-radius:20px; background-color:#093d6f; color:#fff; top:0px; left:0px; position:absolute; line-height:36px; text-align:right; }
.button_aRight span{ z-index:200; padding-right:20px; color:#fff; }

.button_bLeft{ width:64px; height:30px; background-color:#fff; -moz-border-radius:20px; -webkit-border-radius:20px; color:#000; position:absolute; top:3px; right:3px; text-transform:uppercase; line-height:30px; text-align:center; cursor:pointer; }
.button_bLeft span{ color:#008ddd; }
.button_bRight{ width:64px; height:30px; background-color:#fff; -moz-border-radius:20px; -webkit-border-radius:20px; color:#000; position:absolute; top:3px; left:3px; text-transform:uppercase; line-height:30px; text-align:center; cursor:pointer; }
.button_bRight span{ color:#008ddd; }

.button_c{ background-color:#008ddd; color:#fff; text-transform:uppercase; }
.button_c span{ color:#093d6f; }

The CSS code is a mess -- lot of CSS goes into styling the button. As always, style however you'd like. Be careful with this set though -- I recommend sticking to just changing colors.

The Dojo JavaScript

dojo.addOnLoad(function() {
	dojo.forEach(dojo.query('.button_wrap'),function(wrap) {
		var a = dojo.query('a',wrap)[0];
		var span = dojo.query('span',a)[0];
		var button = dojo.query('a',wrap)[1];
		
		dojo.anim(span,{ opacity:0 },1);
		
		dojo.connect(button,'onmouseenter',function() {
			dojo.addClass(button,'button_c');
			dojo.anim(a,{ width:200 });
			dojo.anim(span,{ opacity: 1 });
		});
		dojo.connect(button,'onmouseleave',function() {
			dojo.removeClass(button,'button_c');
			dojo.anim(a,{ width:70 });
			dojo.anim(span,{ opacity: 0 });
		});
	});
});

The first step is to collect each "button" DIV and sift through the its child elements to get links and SPAN elements. When the user's mouse enters the "Sign In" link, the first link within the wrapping DIV grows in width and shows the supporting text.

It's little enhancements like these that take a website from a 6 to an 8, transforming the website from static to dynamic. Can you think of any other small enhancements like this? Share!

Recent Features

  • By
    5 Ways that CSS and JavaScript Interact That You May Not Know About

    CSS and JavaScript:  the lines seemingly get blurred by each browser release.  They have always done a very different job but in the end they are both front-end technologies so they need do need to work closely.  We have our .js files and our .css, but...

  • By
    Create Namespaced Classes with MooTools

    MooTools has always gotten a bit of grief for not inherently using and standardizing namespaced-based JavaScript classes like the Dojo Toolkit does.  Many developers create their classes as globals which is generally frowned up.  I mostly disagree with that stance, but each to their own.  In any event...

Incredible Demos

  • By
    Introducing MooTools ScrollSpy

    I've been excited to release this plugin for a long time. MooTools ScrollSpy is a unique but simple MooTools plugin that listens to page scrolling and fires events based on where the user has scrolled to in the page. Now you can fire specific...

  • By
    MooTools TextOverlap Plugin

    Developers everywhere seem to be looking for different ways to make use of JavaScript libraries. Some creations are extremely practical, others aren't. This one may be more on the "aren't" side but used correctly, my TextOverlap plugin could add another interesting design element...

Discussion

  1. Great Job! Didnt I see these on the Adobe website though?

  2. Good! Maybe you could make a Dojo tutorial (and a Moo one as well)!

  3. @ctult: There are MooTools and jQuery tutorials that mirror this functionality. Check the “Related Posts” section above.

  4. @David Walsh: Oh. Yeah. Erm…I..uh knew that.

  5. Cool effect. I was looking for a different type of a twitter login. This definitely goes into the list.

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