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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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Insecure Resource

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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-.

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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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About Packages

Using packages here is powered by Skypack, which makes packages from npm not only available on a CDN, but prepares them for native JavaScript ES6 import usage.

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

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HTML 

              
                <div class="hashnode-logo"></div>
!

CSS 

              
                @property --center {
  syntax: '<percentage>';
  inherits: false;
  initial-value: 28%;
}

@property --skin {
  syntax: '<color>';
  inherits: false;
  initial-value: #fff;
}

@property --mane {
  syntax: '<color>';
  inherits: false;
  initial-value: #c60;
}

@keyframes drawLion {
  0% {
    --skin: #fff;
    --center: 28%;
    background-color: #2962ff;
  }
  20% {
    --skin: #fff;
    --center: 40%;
    background-color: #2962ff;
  }
  30% {
    --skin: #fb4;
    background-color: #c60;
  }
  100% {
    --center: 40%;
    --skin: #fb4;
    background-color: #c60;
  }
}

.hashnode-logo {
  aanimation: drawLion 4s 1s 1 forwards;
  
  --center: 28%;
  --skin: #fff;
  
  width: 60vmin;
  box-shadow: 30vmin 0 #ddd, 60vmin 0 #ddd, 90vmin 0 #ddd, 120vmin 0 #ddd;
  aspect-ratio: 1;
  position: absolute;
  border-radius: 27%;
  transform: rotate(45deg);
  background:
    /* sun lightness*/
    linear-gradient(to right, #fff2, #0000),
    
    /* whiskers */
    radial-gradient(#000 4%, #0000 0) 51% 75% / 20% 20%,
    radial-gradient(#000 4%, #0000 0) 75% 51% / 20% 20%,
    radial-gradient(#000 4%, #0000 0) 50% 80% / 20% 20%,
    radial-gradient(#000 4%, #0000 0) 81% 50% / 20% 20%,
    radial-gradient(#000 4%, #0000 0) 57% 75% / 20% 20%,
    radial-gradient(#000 4%, #0000 0) 75% 58% / 20% 20%,
    
    /* eyes */
    radial-gradient(#fff 5%, #0000 0) 30.5% 57% / 20% 20%,
    radial-gradient(#fff 5%, #0000 0) 55% 32.5% / 20% 20%,
    radial-gradient(#000 15%, #c60 16% 24%, #0000 25%) 33% 57% / 20% 20%,
    radial-gradient(#000 15%, #c60 16% 24%, #0000 25%) 57% 33% / 20% 20%,
    radial-gradient(#fff 45%, #0000 0) 32% 56% / 20% 20%,
    radial-gradient(#fff 45%, #0000 0) 56% 32% / 20% 20%,
    
    /* nose */
    linear-gradient(135deg, #0000 90%, #630 0) 30% 30% / 45% 45%,
    conic-gradient(at 0 0, #0000 125deg, #fff3 0 145deg, #0000 0) 44.5% 44.5% / 31% 31%,
    
    /* mouth line */
    linear-gradient(45deg, #0000 48%, #000 0 52%, #0000 0) 66.6% 66.6% / 10% 10%,
    radial-gradient(var(--skin) var(--center), #0000 0),
    
    /* ears */
    radial-gradient(circle at 50% 100%, #fd9 20%, var(--skin) 0 45%, #0000 0) 50% 0% / 20% 20%,
    radial-gradient(circle at 100% 50%, #fd9 20%, var(--skin) 0 45%, #0000 0) 0% 50% / 20% 20%,
    
    /* chin */
    radial-gradient(at 61% 65%, #fd9 14.75%, #0000 15%),
    radial-gradient(at 65% 61%, #fd9 14.75%, #0000 15%),
    linear-gradient(135deg, #fd9 0 0) 69% 69% / 15% 15%,
    linear-gradient(135deg, #fd9 0 0) 67% 70% / 15% 15%,
    linear-gradient(135deg, #fd9 0 0) 70% 67% / 15% 15%,
    
    /* shadow lines */
    linear-gradient( #0002 0 0) 100% 50% / 50% 57%,
    linear-gradient( #0002 0 0) 100% 11% / 50% 10.125%,
    linear-gradient( #0002 0 0) 35% 50% / 50% 20%,
    
    /* mane lines */
    repeating-conic-gradient(#0000 0 13deg, #fff3 0 15deg),
    repeating-conic-gradient(#0000 0 27deg, #0001 0 29deg),
    repeating-conic-gradient(var(--mane) 0 21deg, #6002 0 23deg)
    ;
  background-repeat: no-repeat;
  background-color: #2962ff;
  /* for demo, centering it on the page */
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) rotate(45deg);
  
  
  
   --center: 40%;
    --skin: #fb4;
  --mane: #c60;
    background-color: #c60;
}
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JS
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