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!

Recent Features

  • By
    Serving Fonts from CDN

    For maximum performance, we all know we must put our assets on CDN (another domain).  Along with those assets are custom web fonts.  Unfortunately custom web fonts via CDN (or any cross-domain font request) don't work in Firefox or Internet Explorer (correctly so, by spec) though...

  • By
    Chris Coyier&#8217;s Favorite CodePen Demos

    David asked me if I'd be up for a guest post picking out some of my favorite Pens from CodePen. A daunting task! There are so many! I managed to pick a few though that have blown me away over the past few months. If you...

Incredible Demos

  • By
    Table Cell and Position Absolute

    If you follow me on Twitter, you saw me rage about trying to make position: absolute work within a TD element or display: table-cell element.  Chrome?  Check.  Internet Explorer?  Check.  Firefox?  Ugh, FML.  I tinkered in the console...and cussed.  I did some researched...and I...

  • By
    Duplicate the jQuery Homepage Tooltips Using Dojo

    The jQuery homepage has a pretty suave tooltip-like effect as seen below: Here's how to accomplish this same effect using Dojo. The XHTML The above HTML was taken directly from the jQuery homepage -- no changes. The CSS The above CSS has been slightly modified to match the CSS rules already...

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!