learning-area/css/css-layout/practical-positioning-examples/hidden-info-panel-start.html at main · mdn/learning-area · GitHub

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<!DOCTYPE html>
<html lang="en-US">
  <head>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width" />
    <title>Hidden info panel</title>

    <style></style>
  </head>

  <body>
    <button
      type="button"
      id="menu-button"
      aria-haspopup="true"
      aria-controls="info-panel"
      aria-expanded="false">
      ❔
    </button>

    <aside id="info-panel" aria-labelledby="menu-button">
      <h2>Information</h2>

      <p>Some very important information about your app:</p>

      <ol>
        <li>It has a really cool slide-out information panel.</li>
        <li>
          This information panel uses a combination of fixed positioning and a
          CSS transition for the smooth sliding.
        </li>
        <li>
          Using JavaScript this information panel is brought in and out of the
          view.
        </li>
      </ol>
    </aside>
    <script></script>
  </body>
</html>