By , April 2012

CSS3 Animated Loading Bar

I'm working on a project that requires a bit of Javascript loading time before displaying the UI, so instead of doing what I usually do and downloading an animated gif from ajaxload I thought it would be a good opportunity to try out a CSS3 animation.

37signals

Inspired by 37 Signals loading bar (pictured above) and making good use of Chris Coyier's tutorial on CSS3 Progress Bars I set to work designing a bar in Photoshop and then replicating it in CSS3.

Animatedloadingbar

View demo here

CSS and Markup

Here is the source code if you want to try it yourself.

<style>
/* 
Set the container for the bar
*/
.bar {
    height:20px;
    width:200px;
    padding:10px;
    margin:200px auto 0;
    background-color:rgba(0,0,0,.1);
    -webkit-border-radius:25px;
    -moz-border-radius:25px;
    -ms-border-radius:25px;
    border-radius:20px;
    -webkit-box-shadow:0 1px 0 rgba(255,255,255,.03),inset 0 1px 0 rgba(0,0,0,.1);
    -moz-box-shadow:0 1px 0 rgba(255,255,255,.03),inset 0 1px 0 rgba(0,0,0,.1);
    -ms-box-shadow:0 1px 0 rgba(255,255,255,.03),inset 0 1px 0 rgba(0,0,0,.1);
    box-shadow:0 1px 0 rgba(255,255,255,.03),inset 0 1px 0 rgba(0,0,0,.1);
}

/* 
This is the actual bar with stripes
*/   
.bar span {
    display:inline-block;
    height:100%;
    width:100%;
    border:1px solid #ff9a1a;
    border-bottom-color:#ff6201;
    background-color:#d3d3d3;
    -webkit-border-radius:20px;
    -moz-border-radius:20px;
    -ms-border-radius:20px;
    border-radius:20px;
    -webkit-box-sizing:border-box;
    -moz-box-sizing:border-box;
    -ms-box-sizing:border-box;
    box-sizing:border-box;
    background-image:
        -webkit-linear-gradient(
        -45deg,
        rgba(255, 154, 26, 1) 25%,
        transparent 25%,
        transparent 50%,
        rgba(255, 154, 26, 1) 50%,
        rgba(255, 154, 26, 1) 75%,
        transparent 75%,
        transparent
    );
    background-image:
        -moz-linear-gradient(
        -45deg,
        rgba(255, 154, 26, 1) 25%,
        transparent 25%,
        transparent 50%,
        rgba(255, 154, 26, 1) 50%,
        rgba(255, 154, 26, 1) 75%,
        transparent 75%,
        transparent
    );
    background-image:
        -ms-linear-gradient(
        -45deg,
        rgba(255, 154, 26, 1) 25%,
        transparent 25%,
        transparent 50%,
        rgba(255, 154, 26, 1) 50%,
        rgba(255, 154, 26, 1) 75%,
        transparent 75%,
        transparent
    );
    background-image:
        linear-gradient(
        -45deg,
        rgba(255, 154, 26, 1) 25%,
        transparent 25%,
        transparent 50%,
        rgba(255, 154, 26, 1) 50%,
        rgba(255, 154, 26, 1) 75%,
        transparent 75%,
        transparent
    );
    -webkit-background-size:50px 50px;
    -moz-background-size:50px 50px;
    -ms-background-size:50px 50px;
    background-size:50px 50px;
    -webkit-animation:move 2s linear infinite;
    -moz-animation:move 2s linear infinite;
    -ms-animation:move 2s linear infinite;
    animation:move 2s linear infinite;
    -webkit-border-radius:20px;
    -moz-border-radius:20px;
    -ms-border-radius:20px;
    border-radius:20px;
    overflow: hidden;
    -webkit-box-shadow:inset 0 10px 0 rgba(255,255,255,.2);
    -moz-box-shadow:inset 0 10px 0 rgba(255,255,255,.2);
    -ms-box-shadow:inset 0 10px 0 rgba(255,255,255,.2);
    box-shadow:inset 0 10px 0 rgba(255,255,255,.2);
}

/*
Animate the stripes
*/   
@-webkit-keyframes move{
  0% {
    background-position: 0 0;
  }
  100% {
    background-position: 50px 50px;
  }
}    
@-moz-keyframes move{
  0% {
    background-position: 0 0;
  }
  100% {
    background-position: 50px 50px;
  }
}    
@-ms-keyframes move{
  0% {
    background-position: 0 0;
  }
  100% {
    background-position: 50px 50px;
  }
}    
@keyframes move{
  0% {
    background-position: 0 0;
  }
  100% {
    background-position: 50px 50px;
  }
}    
</style>

<!-- Start of loading bar -->
<div class="bar">
    <span></span>
</div>
<!-- End of loading bar -->

View demo here

If you like it please give it some love on Dribbble.

« 5 Ways to get valuable user feedback What Would Marty Cagan Do? »

Receive more design content like this to your inbox

I promise not to spam you. No more than one email per week.