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JavaScript preprocessors can help make authoring JavaScript easier and more convenient. For instance, CoffeeScript can help prevent easy-to-make mistakes and offer a cleaner syntax and Babel can bring ECMAScript 6 features to browsers that only support ECMAScript 5.

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Here you can Sed posuere consectetur est at lobortis. Donec ullamcorper nulla non metus auctor fringilla. Maecenas sed diam eget risus varius blandit sit amet non magna. Donec id elit non mi porta gravida at eget metus. Praesent commodo cursus magna, vel scelerisque nisl consectetur et.

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HTML

            
              <h1>Link Ideas (proof of concept)</h1>
<div class="wrapper">
  <a class="first after" href="#">Left to Right</a>
</div>
<div class="wrapper">
  <a class="second after" href="#">Right to Left</a>
</div>
<div class="wrapper">
  <a class="third after" href="#">Start Centered</a>
</div>
<div class="wrapper">
  <a class="fourth before after" href="#">Top & Bottom // Left to Right</a>
</div>
<div class="wrapper">
  <a class="fifth before after" href="#">Top & Bottom // Right to Left</a>
</div>
<div class="wrapper">
  <a class="sixth before after" href="#">Top & Bottom // Start Centered</a>
</div>
<div class="wrapper">
  <a class="seventh before after" href="#">Top & Bottom // Opposite Start</a>
</div>
<div class="wrapper">
  <a class="eigth before after" href="#">Top & Bottom // Opposite Start Reversed</a>
</div>
<div class="wrapper">
  <span class="square individual">
    <a class="ninth before after" href="#">Cool Square</a>
  </span>
</div>
<div class="wrapper">
  <span class="square">
    <a class="tenth before after" href="#">Cool Square Simultaneous</a>
  </span>
</div>
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CSS

            
              @import url(https://fonts.googleapis.com/css?family=Open+Sans);

body{
  font-family:'Open Sans', sans-serif;
  background:#151837;
  width:90%;
  margin:0 auto;
  padding:2em 0 6em;
}
h1:before{
  content: "// ";
}
h1{
  font-size:3em;
  color:#fefefe;
  text-transform:lowercase;
}
.wrapper{
  margin:3em 0;
}
a,a:visited,a:hover,a:active{
  -webkit-backface-visibility:hidden;
          backface-visibility:hidden;
	position:relative;
  transition:0.5s color ease;
	text-decoration:none;
	color:#81b3d2;
	font-size:2.5em;
}
a:hover{
	color:#d73444;
}
a.before:before,a.after:after{
  content: "";
  transition:0.5s all ease;
  -webkit-backface-visibility:hidden;
          backface-visibility:hidden;
  position:absolute;
}
a.before:before{
  top:-0.25em;
}
a.after:after{
  bottom:-0.25em;
}
a.before:before,a.after:after{
  height:5px;
  height:0.35rem;
  width:0;
  background:#d73444;
}
a.first:after{
  left:0;
}
a.second:after{
  right:0;
}
a.third:after,a.sixth:before,a.sixth:after{
  left:50%;
  -webkit-transform:translateX(-50%);
          transform:translateX(-50%);
}
a.fourth:before,a.fourth:after{
  left:0;
}
a.fifth:before,a.fifth:after{
  right:0;
}
a.seventh:before{
  right:0;
}
a.seventh:after{
  left:0;
}
a.eigth:before{
  left:0;
}
a.eigth:after{
  right:0;
}
a.before:hover:before,a.after:hover:after{
  width:100%;
}
.square{
  box-sizing:border-box;
  margin-left:-0.4em;
  position:relative;
  font-size:2.5em;
  overflow:hidden;
}
.square a{
  position:static;
  font-size:100%;
  padding:0.2em 0.4em;
}
.square:before,.square:after{
  content: "";
  box-sizing:border-box;
  transition:0.25s all ease;
  -webkit-backface-visibility:hidden;
          backface-visibility:hidden;
  position:absolute;
  width:5px;
  width:0.35rem;
  height:0;
  background:#d73444;
}
.square:before{
  left:0;
  bottom:-0.2em;
}
.square.individual:before{
  transition-delay:0.6s;
}
.square:after{
  right:0;
  top:-0.2em;
}
.square.individual:after{
  transition-delay:0.2s;
}
.square a:before{
  left:0;
  transition:0.25s all ease;
}
.square a:after{
  right:0;
  transition:0.25s all ease;
}
.square.individual a:after{
  transition:0.25s all ease 0.4s;
}
.square:hover:before,.square:hover:after{
  height:calc(100% + 0.4em);
}
.square:hover a:before,.square:hover a:after{
  width:100%;
}
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