parcel_css 1.0.0-alpha.32

A CSS parser, transformer, and minifier
Documentation 
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<!DOCTYPE html>
<html>
  <head>
    <title>Parcel CSS Playground</title>
    <style>
      html, body {
        margin: 0;
        height: 100%;
        box-sizing: border-box;
        font-family: -apple-system, system-ui;
        color-scheme: dark light;
      }

      body {
        display: flex;
        flex-direction: column;
        gap: 5px;
        padding: 10px;
      }

      header {
        display: flex;
        align-items: center;
        justify-content: space-between;
      }

      header a {
        color: inherit;
      }

      header svg {
        fill: currentColor;
      }

      .targets {
        display: table;
        margin-top: 10px;
      }

      .targets label {
        display: table-row;
      }

      .targets label span,
      .targets label input {
        display: table-cell;
      }

      main {
        display: flex;
        flex: 1
      }

      textarea {
        flex: 1;
        font: 14px monospace;
      }

      label {
        display: block;
      }

      h3 {
        margin-bottom: 4px;
      }

      div > h3:first-child {
        margin-top: 0;
      }
    </style>
  </head>
  <body>
    <header>
      <h1>Parcel CSS Playground</h1>
      <a href="https://github.com/parcel-bundler/parcel-css" target="_blank" aria-label="GitHub">
        <svg aria-hidden="true" width="30" height="30" viewBox="0 0 20 20"> <title>GitHub</title> <path d="M10 0a10 10 0 0 0-3.16 19.49c.5.1.68-.22.68-.48l-.01-1.7c-2.78.6-3.37-1.34-3.37-1.34-.46-1.16-1.11-1.47-1.11-1.47-.9-.62.07-.6.07-.6 1 .07 1.53 1.03 1.53 1.03.9 1.52 2.34 1.08 2.91.83.1-.65.35-1.09.63-1.34-2.22-.25-4.55-1.11-4.55-4.94 0-1.1.39-1.99 1.03-2.69a3.6 3.6 0 0 1 .1-2.64s.84-.27 2.75 1.02a9.58 9.58 0 0 1 5 0c1.91-1.3 2.75-1.02 2.75-1.02.55 1.37.2 2.4.1 2.64.64.7 1.03 1.6 1.03 2.69 0 3.84-2.34 4.68-4.57 4.93.36.31.68.92.68 1.85l-.01 2.75c0 .26.18.58.69.48A10 10 0 0 0 10 0"></path> </svg>
      </a>
    </header>
    <main>
      <div>
        <h3>Options</h3>
        <label><input id="minify" type="checkbox" checked> Minify</label>
        <label><input id="cssModules" type="checkbox"> CSS modules</label>
        <label><input id="analyzeDependencies" type="checkbox"> Analyze dependencies</label>
        <h3>Draft syntax</h3>
        <label><input id="nesting" type="checkbox" checked> Nesting</label>
        <label><input id="customMedia" type="checkbox" checked> Custom media queries</label>
        <h3>Targets</h3>
        <div class="targets">
          <label><span>Chrome: </span><input id="chrome" type="number" value="95"></label>
          <label><span>Firefox: </span><input id="firefox" type="number"></label>
          <label><span>Safari: </span><input id="safari" type="number"></label>
          <label><span>Opera: </span><input id="opera" type="number"></label>
          <label><span>Edge: </span><input id="edge" type="number"></label>
          <label><span>IE: </span><input id="ie" type="number"></label>
          <label><span>iOS: </span><input id="ios_saf" type="number"></label>
          <label><span>Android: </span><input id="android" type="number"></label>
          <label><span>Samsung: </span><input id="samsung" type="number"></label>
        </div>
        <label>
          <h3>Unused symbols</h3>
          <textarea id="unusedSymbols" rows="4" placeholder="Separate items with newlines"></textarea>
        </label>
        <label>
          <h3>Version</h3>
          <select id="version"><option value="local">local</option></select>
        </label>
      </div>
      <textarea id="source">
@custom-media --modern (color), (hover);

.foo {
  background: yellow;

  -webkit-border-radius: 2px;
  -moz-border-radius: 2px;
  border-radius: 2px;
  
  -webkit-transition: background 200ms;
  -moz-transition: background 200ms;
  transition: background 200ms;

  &.bar {
    color: green;
  }
}

@media (--modern) and (width > 1024px) {
  .a {
    color: green;
  }
}</textarea>
      <textarea id="compiled"></textarea>
      <textarea id="compiledModules" hidden></textarea>
      <textarea id="compiledDependencies" hidden></textarea>
    </main>
    <script type="module" src="playground.js"></script>
  </body>
</html>