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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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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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You can also link to another Pen here, and we'll pull the JavaScript from that Pen and include it. If it's using a matching preprocessor, we'll combine the code before preprocessing, so you can use the linked Pen as a true dependency.

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Packages

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HTML 

              
                <svg width="25%" height="25%" viewBox="0 0 100 100" fill="none" xmlns="http://www.w3.org/2000/svg" tabindex="0">
  <rect class="buttonSides" x="5.04999" y="51" width="90.62" height="8" fill="#763AC2" />
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    <path class="buttonSides playSides" d="M64.2199 42.5L55.4353 61.4282L31.4353 47.5718L64.2199 42.5Z" fill="#763AC2" />
    <g class="glowAll" filter="url(#filter0_d_106_11)">
      <path d="M64.2199 42.5L55.4353 61.4282L31.4353 47.5718L64.2199 42.5Z" fill="white" />
    </g>
    <g class="glowMe" opacity="0.5" filter="url(#filter1_f_106_11)">
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    </g>
  </g>
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      <feFlood flood-opacity="0" result="BackgroundImageFix" />
      <feColorMatrix in="SourceAlpha" type="matrix" values="0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 127 0" result="hardAlpha" />
      <feOffset />
      <feGaussianBlur stdDeviation="4" />
      <feComposite in2="hardAlpha" operator="out" />
      <feColorMatrix type="matrix" values="0 0 0 0 1 0 0 0 0 1 0 0 0 0 1 0 0 0 1 0" />
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    </filter>
    <filter id="filter1_f_106_11" x="3.37613" y="20.9032" width="85.6716" height="62.9873" filterUnits="userSpaceOnUse" color-interpolation-filters="sRGB">
      <feFlood flood-opacity="0" result="BackgroundImageFix" />
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  </defs>
</svg>

<svg width="25%" height="25%" viewBox="0 0 100 100" fill="none" xmlns="http://www.w3.org/2000/svg" tabindex="0">
  <rect class="buttonSides" x="5.04999" y="51" width="90.62" height="8" fill="#763AC2" />
  <rect class="buttonSides" width="57" height="57" rx="8" transform="matrix(0.866025 -0.5 0.866025 0.5 1 59)" fill="#763AC2" />
  <g clip-path="url(#clip0_106_11)">
    <rect class="buttonTop" width="57" height="57" rx="8" transform="matrix(0.866025 -0.5 0.866025 0.5 1 51)" fill="#A661FF" />
    <path class="buttonSides playSides" d="M64.2199 42.5L55.4353 61.4282L31.4353 47.5718L64.2199 42.5Z" fill="#763AC2" />
    <g class="glowAll" filter="url(#filter0_d_106_11)">
      <path d="M64.2199 42.5L55.4353 61.4282L31.4353 47.5718L64.2199 42.5Z" fill="white" />
    </g>
    <g class="glowMe" opacity="0.5" filter="url(#filter1_f_106_11)">
      <path d="M73.0478 36.9032L58.6665 67.8905L19.3761 45.2062L73.0478 36.9032Z" fill="white" />
    </g>
  </g>
  <path class="glowMe" opacity="0.5" d="M64 43L32 47.8L32 8L64 8L64 43Z" fill="url(#paint0_linear_106_11)" />
  <defs>
    <filter id="filter0_d_106_11" x="23.4353" y="34.5" width="48.7846" height="34.9282" filterUnits="userSpaceOnUse" color-interpolation-filters="sRGB">
      <feFlood flood-opacity="0" result="BackgroundImageFix" />
      <feColorMatrix in="SourceAlpha" type="matrix" values="0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 127 0" result="hardAlpha" />
      <feOffset />
      <feGaussianBlur stdDeviation="4" />
      <feComposite in2="hardAlpha" operator="out" />
      <feColorMatrix type="matrix" values="0 0 0 0 1 0 0 0 0 1 0 0 0 0 1 0 0 0 1 0" />
      <feBlend mode="normal" in2="BackgroundImageFix" result="effect1_dropShadow_106_11" />
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    </filter>
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      <feFlood flood-opacity="0" result="BackgroundImageFix" />
      <feBlend mode="normal" in="SourceGraphic" in2="BackgroundImageFix" result="shape" />
      <feGaussianBlur stdDeviation="8" result="effect1_foregroundBlur_106_11" />
    </filter>
    <linearGradient id="paint0_linear_106_11" x1="47" y1="48" x2="47" y2="8" gradientUnits="userSpaceOnUse">
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  </defs>
</svg>

<svg width="25%" height="25%" viewBox="0 0 100 100" fill="none" xmlns="http://www.w3.org/2000/svg" tabindex="0">
  <rect class="buttonSides" x="5.04999" y="51" width="90.62" height="8" fill="#763AC2" />
  <rect class="buttonSides" width="57" height="57" rx="8" transform="matrix(0.866025 -0.5 0.866025 0.5 1 59)" fill="#763AC2" />
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    <rect class="buttonTop" width="57" height="57" rx="8" transform="matrix(0.866025 -0.5 0.866025 0.5 1 51)" fill="#A661FF" />
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    <g class="glowAll" filter="url(#filter0_d_106_11)">
      <path d="M64.2199 42.5L55.4353 61.4282L31.4353 47.5718L64.2199 42.5Z" fill="white" />
    </g>
    <g class="glowMe" opacity="0.5" filter="url(#filter1_f_106_11)">
      <path d="M73.0478 36.9032L58.6665 67.8905L19.3761 45.2062L73.0478 36.9032Z" fill="white" />
    </g>
  </g>
  <path class="glowMe" opacity="0.5" d="M64 43L32 47.8L32 8L64 8L64 43Z" fill="url(#paint0_linear_106_11)" />
  <defs>
    <filter id="filter0_d_106_11" x="23.4353" y="34.5" width="48.7846" height="34.9282" filterUnits="userSpaceOnUse" color-interpolation-filters="sRGB">
      <feFlood flood-opacity="0" result="BackgroundImageFix" />
      <feColorMatrix in="SourceAlpha" type="matrix" values="0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 127 0" result="hardAlpha" />
      <feOffset />
      <feGaussianBlur stdDeviation="4" />
      <feComposite in2="hardAlpha" operator="out" />
      <feColorMatrix type="matrix" values="0 0 0 0 1 0 0 0 0 1 0 0 0 0 1 0 0 0 1 0" />
      <feBlend mode="normal" in2="BackgroundImageFix" result="effect1_dropShadow_106_11" />
      <feBlend mode="normal" in="SourceGraphic" in2="effect1_dropShadow_106_11" result="shape" />
    </filter>
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      <feFlood flood-opacity="0" result="BackgroundImageFix" />
      <feBlend mode="normal" in="SourceGraphic" in2="BackgroundImageFix" result="shape" />
      <feGaussianBlur stdDeviation="8" result="effect1_foregroundBlur_106_11" />
    </filter>
    <linearGradient id="paint0_linear_106_11" x1="47" y1="48" x2="47" y2="8" gradientUnits="userSpaceOnUse">
      <stop stop-color="white" />
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    </linearGradient>
    <clipPath id="clip0_106_11">
      <rect width="57" height="57" rx="8" transform="matrix(0.866025 -0.5 0.866025 0.5 1 51)" fill="white" />
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  </defs>
</svg>
!

CSS 

              
                body {
  position: absolute;
  display: flex;
  inset: 0;
  align-items: center;
  justify-content: center;
  background-color: #000000;
}
.glowMe,
.glowAll {
  opacity: 0;
  transition: opacity 300ms linear 0s;
}
svg {
  width: 30vw;
  height: 30vw;
  cursor: pointer;
}
svg:hover .glowMe {
  opacity: 0.5;
}
svg:hover .glowAll {
  opacity: 1;
}
.buttonTop {
  fill: #5f309b;
  transition: fill 300ms linear 0s;
}
svg:hover .buttonTop {
  fill: #a661ff;
}
.buttonSides {
  fill: #371b5b;
  transition: fill 300ms linear 0s;
}
svg:hover .buttonSides {
  fill: #763ac2;
}
svg:focus {
  outline: none;
}
svg:focus .buttonTop,
svg:focus .playSides {
  stroke: white;
  stroke-width: 2px;
}
svg:focus .playSides {
  stroke-width: 1px;
}
svg:active .buttonTop {
  fill: #c79cff;
}

svg:nth-of-type(1) {
  transform: translate(37%, -35%);
}
svg:nth-of-type(3) {
  transform: translate(-37%, 35%);
}
!

JS
!
999px

Console