Treehouse

GitHub-Style Sliding Links

By on  

GitHub seems to change a lot but not really change at all, if that makes any sense; the updates come often but are always fairly small. I spotted one of the most recent updates on the pull request page. Links to long branch names now have their text visually truncated, and upon hover, the text animates to its full value. The CSS to accomplish this task is fairly simple, so let me show you how to make this happen!

The HTML

Adding an A element is obvious but less obvious is that the element must be wrapped with another element (you'll see why in the CSS section):

<p class="github-branch-wrap">
	Pull request from: <a href="" class="github-branch">david-walsh-test-branch-name</a>
</p>

Simples.

The CSS

The wrapping element requires a max-width and position of relative:

.github-branch-wrap {
	max-width:690px;
	position:relative;
}

The animation centers around CSS transitions and the max-width property paired with overflow:

.github-branch {
	position: relative;
	height: 24px;
	display: inline-block;
	top: 7px;
	padding: 0 7px;
	background: #444;
	background: -moz-linear-gradient(#444, #222);
	background: -webkit-linear-gradient(#444, #222);
	-ms-filter: "progid:DXImageTransform.Microsoft.gradient(startColorstr='#444444',endColorstr='#222222')";
	border: 1px solid black;
	border-radius: 3px;
	color: white;
	font-family: Consolas,"Liberation Mono",Courier,monospace;
	font-size: 13px;
	line-height: 24px;
	text-overflow: ellipsis;
	overflow: hidden;
	white-space: nowrap;
	vertical-align: top;
	z-index: 100;
	
	max-width: 125px;
	transition: .2s max-width linear;
	-o-transition: .2s max-width linear;
	-moz-transition: .2s max-width linear;
	-webkit-transition: .2s max-width linear;
	-ms-transition: .2s max-width linear;
}

/* Transition to complete width! */
.github-branch:hover, .github-branch:active {
	max-width: inherit;
}

Also note the nice touch of text-overflow:ellipsis -- this adds the "..." during the plain state.

I didn't like the effect at first, but it's grown on me, and actually does have some value. There's definitely some clever thought behind the effect, and it's the the type of effect I admire: simple but purposeful. Well done GitHub devs!

ydkjs-5.png

Recent Features

  • 9 Mind-Blowing Canvas&nbsp;Demos

    The <canvas> element has been a revelation for the visual experts among our ranks.  Canvas provides the means for incredible and efficient animations with the added bonus of no Flash; these developers can flash their awesome JavaScript skills instead.  Here are nine unbelievable canvas demos that...

  • 9 More Mind-Blowing WebGL&nbsp;Demos

    With Firefox OS, asm.js, and the push for browser performance improvements, canvas and WebGL technologies are opening a world of possibilities.  I featured 9 Mind-Blowing Canvas Demos and then took it up a level with 9 Mind-Blowing WebGL Demos, but I want to outdo...

Incredible Demos

  • 9 Mind-Blowing Canvas&nbsp;Demos

    The <canvas> element has been a revelation for the visual experts among our ranks.  Canvas provides the means for incredible and efficient animations with the added bonus of no Flash; these developers can flash their awesome JavaScript skills instead.  Here are nine unbelievable canvas demos that...

  • Check All/None Checkboxes Using&nbsp;MooTools

    There's nothing worse than having to click every checkbox in a list. Why not allow users to click one item and every checkbox becomes checked? Here's how to do just that with MooTools 1.2. The XHTML Note the image with the ucuc ID -- that...

Discussion

  1. why do you wrap the a-tag into the paragraph? If you change the :hover max-width from inherit to 690px it works without the p-tag (in Chrome).

  2. Josephy
    $('#LOOKS').html('COOL') 
  3. Amazing CSS Slide LInks

    Thanks david

  4. Jesse Glacken

    Works great! Only thing I’d add is a :focus selector to the list of selectors at the end. We’re not all fortunate enough to be able to use mice (and some of us prefer keyboards). :)

  5. Great!!! I was looking for this great thing..

  6. I like the effect, but it fails completely in Internet Explorer 7-9 :(

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