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!

Raygun Pulse

Recent Features

  • By
    Vibration API

    Many of the new APIs provided to us by browser vendors are more targeted toward the mobile user than the desktop user.  One of those simple APIs the Vibration API.  The Vibration API allows developers to direct the device, using JavaScript, to vibrate in...

  • By
    7 Essential JavaScript Functions

    I remember the early days of JavaScript where you needed a simple function for just about everything because the browser vendors implemented features differently, and not just edge features, basic features, like addEventListener and attachEvent.  Times have changed but there are still a few functions each developer should...

Incredible Demos

  • By
    MooTools ASCII Art

    I didn't realize that I truly was a nerd until I could admit to myself that ASCII art was better than the pieces Picasso, Monet, or Van Gogh could create.  ASCII art is unmatched in its beauty, simplicity, and ... OK, well, I'm being ridiculous;  ASCII...

  • By
    Select Dropdowns, MooTools, and CSS Print

    I know I've harped on this over and over again but it's important to enhance pages for print. You can do some things using simple CSS but today's post features MooTools and jQuery. We'll be taking the options of a SELECT element and generating...

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!