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
    5 Awesome New Mozilla Technologies You&#8217;ve Never Heard Of

    My trip to Mozilla Summit 2013 was incredible.  I've spent so much time focusing on my project that I had lost sight of all of the great work Mozillians were putting out.  MozSummit provided the perfect reminder of how brilliant my colleagues are and how much...

  • By
    CSS Gradients

    With CSS border-radius, I showed you how CSS can bridge the gap between design and development by adding rounded corners to elements.  CSS gradients are another step in that direction.  Now that CSS gradients are supported in Internet Explorer 8+, Firefox, Safari, and Chrome...

Incredible Demos

  • By
    Drag &#038; Drop Elements to the Trash with MooTools 1.2

    Everyone loves dragging garbage files from their desktop into their trash can. There's a certain amount of irony in doing something on your computer that you also do in real life. It's also a quick way to get rid of things. That's...

  • By
    Parallax Sound Waves Animating on Scroll

    Scrolling animations are fun. They are fun to create and fun to use. If you are tired of bootstrapping you might find playing with scrolling animations as a nice juicy refreshment in your dry front-end development career. Let's have a look how to create animating...

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!