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A Pen By yukifujinami

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About CSS Preprocessors

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CSS Base

About CSS Base

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About JavaScript Preprocessors

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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HTML

            
              <div class="hover-sample">
  マウスをあててみて
</div>
!

CSS

            
              .hover-sample{
  background-color:red;
  width:300px;
  text-align:center;
  padding:20px;
  color:#ffffff;
  transition: background-color 0.3s ease-out 0.3s;
}

.hover-sample:hover{
  background-color:blue;
}
!

JS
!
999px
🕑 One or more of the npm packages you are using needs to be built. You're the first person to ever need it! We're building it right now and your preview will start updating again when it's ready.
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