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HTML

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CSS

About CSS Preprocessors

CSS preprocessors help make authoring CSS easier. All of them offer things like variables and mixins to provide convenient abstractions.

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CSS Base

About CSS Base

It's a common practice to apply CSS to a page that styles elements such that they are consistent across all browsers. We offer two of the most popular choices: normalize.css and a reset. Or, choose Neither and nothing will be applied.

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About Vendor Prefixing

To get the best cross-browser support, it is a common practice to apply vendor prefixes to CSS properties and values that require them to work. For instance -webkit- or -moz-.

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JavaScript

About JavaScript Preprocessors

JavaScript preprocessors can help make authoring JavaScript easier and more convenient.

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Babel includes JSX processing.

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Packages

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Search for and use JavaScript packages from npm here. By selecting a package, an import statement will be added to the top of the JavaScript editor for this package.

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Using packages here is powered by esm.sh, which makes packages from npm not only available on a CDN, but prepares them for native JavaScript ESM usage.

All packages are different, so refer to their docs for how they work.

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HTML 

              
                <link href='https://fonts.googleapis.com/css?family=Open+Sans:600,700' rel='stylesheet' type='text/css'>

  <div class="container">
Medium, border-radius, 45deg background
<div class="wrap">	
    <button class="clicker">press</button>
    <div class="circle angled"></div>
  </div>

Fast, border-radius, vertical background
  <div class="wrap">	
    <button class="clicker fast">press</button>
    <div class="circle angled second"></div>
  </div>

Faster, no border-radius, 45 deg background
<div class="wrap">	
    <button class="clicker faster">press</button>
    <div class="circle angled third"></div>
  </div>
</div>
!

CSS 

              
                @import "bourbon";

*, *:after, *:before {
  box-sizing: border-box;
}

body {
  @include display(flex);
  @include align-content(center);
  color: #353535;
  min-height: 100vh;
  font-family: 'Open Sans', sans-serif;
  font-size: 14px;
  text-align: center;
  background-color: lightgreen;
}

.container{
  padding: 60px 80px;
  background-color: white;
  box-shadow: 0 0 4px 1px #BBB;
  margin: auto;
  text-align: center;
}

.wrap{  
  position: relative;
  width: 80px;
  height: 80px;
  margin: 20px auto 30px auto;
  &:last-child {
    margin-bottom: 0;
  }
}

.clicker{
  background-color: white;
  outline: none;  
  font-weight: 600;
	  position:absolute;
  cursor: pointer;
  padding: 0;
	  border: none;
	  height: 64px;
	  width: 64px;
  left: 8px;
  top: 8px;
	  border-radius: 100px;
	  z-index: 2;
}

.clicker:active{
	  transform: translate(0, 1px);
  height: 63px;
	  box-shadow: 0px 1px 0 0 rgb(190,190,190) inset;
}

.circle{
	  position: relative;
  border-radius:40px;
	  width: 80px;
	  height: 80px;
	  z-index: 1;
}

.circle.third{
  border-radius: 0;
}

.clicker.faster:hover + .circle, .clicker.faster:active + .circle {
	  animation: rotator linear .4s infinite;
}

.clicker.fast:hover + .circle, .clicker.fast:active + .circle {
	  animation: rotator linear .5s infinite;
}

.clicker:hover + .circle, .clicker:active + .circle {
	  animation: rotator linear .8s infinite;
}

@keyframes rotator{
	  from{ transform: rotate(0deg); }
	  to{ transform: rotate(360deg); }
}

		
.angled {
			background-image: linear-gradient(45deg, 
                white 0%,
                white 30%,
                rgb(20,190,235) 30%,
								rgb(20,190,235) 70%, 
                white 70%, 
                white 100%);
		}

.angled.second{
  			background-image: linear-gradient( 
                white 0%,
                white 30%,
                rgb(250,160,120) 30%,
								rgb(250,160,120) 70%, 
                white 70%, 
                white 100%);
}

.angled.third{
			background-image: linear-gradient(45deg, 
                white 0%,
                white 30%,
                rgb(130,230,135) 30%,
								rgb(130,230,135) 70%, 
                white 70%, 
                white 100%);
}
!

JS
!
999px

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