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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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Adding Classes

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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).

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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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If the script you link to has the file extension of a preprocessor, we'll attempt to process it before applying.

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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 

              
                .wrapper 
  .title Rate your experience
  .content We highly value your feedback! Kindly take a moment to rate your experience and provide us with your valuable feedback.
  .rate-box
     - for(var i = 0; i < 5; i++)
      input(type="radio", name="star", id="star" + i, checked=i === 2)
      label(for="star" + i, class="star")
  textarea(cols="30", rows="6", placeholder="Tell us about your experience!")
  .submit-btn Send
!

CSS 

              
                @import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@400;700&display=swap');
@import url('https://fonts.googleapis.com/css2?family=Potta+One&display=swap');

@mixin flexCenter {
  display: flex;
  justify-content: center;
  align-items: center;
}

* {
  box-sizing: border-box;
}
html {
  font-size: 100vmax / 1600 * 100;
  @media (max-width: 992px) {
    font-size: 60px;
  }
}
body {
  min-height: 100vh;
  padding: 0.5rem;
  @include flexCenter;
  
  color: #222;
  font-size: 0.24rem;
  font-family: 'Space Grotesk', sans-serif;
  
  background-image: radial-gradient(farthest-side, #afc8f9 90%, #fff0), radial-gradient(farthest-side, #ddc1fb 90%, #fff0), radial-gradient(circle at 0 0, #d5e0fa, #e5d5f6);
  background-size: 7rem 7rem, 6rem 6rem, auto;
  background-position: 30% 10%, 80% 90%, 0;
  background-repeat: no-repeat;
  backdrop-filter: blur(50px);
}


$primary-color: #ffcc33;

$shadow-dark: rgba(#000, 0.3);
$shadow-light: rgba(#fff, 0.8);
$shadow-outer: 3px 3px 8px #{$shadow-dark}, -3px -3px 8px #{$shadow-light};
$shadow-inner: inset 2px 2px 8px #{$shadow-dark},
  inset -2px -2px 8px #{$shadow-light};

.wrapper {
  width: 6rem;
  padding: 0.3rem 0.6rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.3rem;
  
  border-radius: 0.25rem;
  box-shadow: 10px 10px 30px rgba(#000, 0.2);
  background-color: rgba(#fff, 0.5);
  z-index: 1;
  .title {
    font-weight: bold;
    font-size: 0.36rem;
  }
  .content {
    line-height: 1.6;
    color: #555;
  }
}

.rate-box {
  display: flex;
  flex-direction: row-reverse; // reverse the order
  gap: 0.1rem;
  input {
    display: none;
    &:hover ~ .star:before {
      color: rgba($primary-color, 0.5);
    }
    &:active +.star:before {
      transform: scale(0.9);
    }
    &:checked ~ .star:before {
      color: $primary-color;
      text-shadow: $shadow-outer;
    }
  }
  .star:before {
    content: '\2605';
    display: inline-block;
    font-family: 'Potta One', cursive;
    font-size: 0.6rem;
    cursor: pointer;
    color: #0000;
    text-shadow: 2px 2px 3px rgba(#fff, 0.5);
    background-color: #aaa;
    background-clip: text;
    -webkit-background-clip: text;
    transition: all 0.3s;
  }
}

textarea {
  border: none;
  resize: none;
  width: 100%;
  padding: 0.2rem;
  
  color: inherit;
  font-family: inherit;
  line-height: 1.5;
  
  border-radius: 0.2rem;
  box-shadow: $shadow-inner;
  background-color: rgba(#fff, 0.3);
  &::placeholder {
    color: #aaa;
  }
  &:focus {
    outline-color: $primary-color;
  }
}

.submit-btn {
  padding: 0.2rem 0.5rem;
  box-shadow: $shadow-outer;
  border-radius: 1rem;
  cursor: pointer;
  background-color: rgba($primary-color, 0.8);
  transition: all 0.2s;
  &:active {
    transform: translate(2px, 2px);
  }
}
!

JS
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