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HTML

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HTML preprocessors can make writing HTML more powerful or convenient. For instance, Markdown is designed to be easier to write and read for text documents and you could write a loop in Pug.

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About the <head>

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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.

Vendor Prefixing

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-.

We offer two popular choices: Autoprefixer (which processes your CSS server-side) and -prefix-free (which applies prefixes via a script, client-side).

Add External Stylesheets/Pens

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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

Add Packages

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 

              
                <div class="grid"></div>
<div class="lines"></div>
<h1>
  <span>RETRO</span>
  <span>RETRO</span>
</h1>
<h2>Text Effect</h2>
!

CSS 

              
                @import url('https://fonts.googleapis.com/css2?family=Mr+Dafoe&display=swap');
@import url('https://fonts.googleapis.com/css2?family=Exo:wght@900&display=swap');

body, html {
  width: 100%;
  height: 100%;
  margin: 0;
  overflow: hidden;
}

body {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  background: radial-gradient(rgba(#7600bf, 0.5) 0%, transparent 70%), linear-gradient(#0b161e 40%, #202076 70%);
  perspective: 700px;
  font-size: clamp(10px, 2vw, 20px);
}

.lines {
  $color: #59c1fe;
  position: fixed;
  width: 100vw;
  height: 4em;
  background: linear-gradient(rgba($color, 0.2) 20%, $color 40%, $color 60%, rgba($color, 0.2) 80%);
  background-size: 1px 0.5em;
  box-shadow: 0 0 1em rgba($color, 0.4);
  transform: translateY(-1em);
  left: 0;
}

h1 {
  position: relative;
  font-family: 'Exo';
  font-size: 9em;
  margin: 0;
  transform: skew(-15deg);
  letter-spacing: 0.03em;
  
  &::after {
    content: '';
    position: absolute;
    top: -0.1em;
    right: 0.05em;
    width: 0.4em;
    height: 0.4em;
    background: 
      radial-gradient(white 3%, rgba(white, 0.3) 15%, rgba(white, 0.05) 60%, transparent 80%),
      radial-gradient(rgba(white, 0.2) 50%, transparent 60%) 50% 50% / 5% 100%,
      radial-gradient(rgba(white, 0.2) 50%, transparent 60%) 50% 50% / 70% 5%;
    background-repeat: no-repeat;
  }
  
  span:first-child {
    display: block;
    text-shadow: 0 0 0.1em #8ba2d0, 0 0 0.2em black,  0 0 5em #165ff3;
    -webkit-text-stroke: 0.06em rgba(black, 0.5);
  }
  
  span:last-child {
    position: absolute;
    left: 0;
    top: 0;
    background-image: linear-gradient(#032d50 25%, #00a1ef 35%, white 50%, #20125f 50%, #8313e7 55%, #ff61af 75%);
    -webkit-text-stroke: 0.01em #94a0b9;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
  }
}

h2 {
  font-family: 'Mr Dafoe';
  margin: 0;
  font-size: 5.5em;
  margin-top: -0.6em;
  color: white;
  text-shadow: 0 0 0.05em #fff, 0 0 0.2em #fe05e1, 0 0 0.3em #fe05e1;
  transform: rotate(-7deg);
}

.grid {
  $main: #7d41e6;
  $glow: rgba(#2e26ff, 0.4);
  background: 
    linear-gradient(transparent 65%, $glow 75%, $main 80%, $glow 85%, transparent 95%),
    linear-gradient(90deg, transparent 65%, $glow 75%, $main 80%, $glow 85%, transparent 95%);
  background-size: 30px 30px;
  width: 200vw;
  height: 300vh;
  position: absolute;
  bottom: -120vh;
  transform: rotateX(-100deg);
  -webkit-mask-image: linear-gradient(rgba(0,0,0,1), rgba(0,0,0,0) 80%);
}
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JS
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999px

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