ReactJS CSS3 Animated Loading Icon

LoadingIcon.css

.spinner {
  margin: 100px auto;
  width: 50px;
  height: 30px;
  text-align: center;
  font-size: 10px;
  opacity: .5;
}

.spinner > div {
  background-color: #3399cc;
  height: 100%;
  width: 6px;
  display: inline-block;
  margin-right: 3px;
  -webkit-animation: stretchdelay 1.2s infinite ease-in-out;
  animation: stretchdelay 1.2s infinite ease-in-out;
}

.spinner .rect2 {
  -webkit-animation-delay: -1.1s;
  animation-delay: -1.1s;
}

.spinner .rect3 {
  -webkit-animation-delay: -1.0s;
  animation-delay: -1.0s;
}

.spinner .rect4 {
  -webkit-animation-delay: -0.9s;
  animation-delay: -0.9s;
}

.spinner .rect5 {
  -webkit-animation-delay: -0.8s;
  animation-delay: -0.8s;
}

@-webkit-keyframes stretchdelay {
  0%, 40%, 100% { -webkit-transform: scaleY(0.4) }
  20% { -webkit-transform: scaleY(1.0) }
}

@keyframes stretchdelay {
  0%, 40%, 100% {
    transform: scaleY(0.4);
    -webkit-transform: scaleY(0.4);
  }  20% {
    transform: scaleY(1.0);
    -webkit-transform: scaleY(1.0);
  }
}

LoadingIcon.jsx

var LoadingIcon = React.createClass({
  render: function(){
    return (
      <div className="spinner">
        <div className="rect1"></div>
        <div className="rect2"></div>
        <div className="rect3"></div>
        <div className="rect4"></div>
        <div className="rect5"></div>
      </div>
    )
  }
})

Super easy to use this loading icon...

<LoadingIcon />

Btw, if you want to get more loaders, check out this page! Really cool resource: http://tobiasahlin.com/spinkit/