css-examples/learn/sizing/percent-width.html at 5ce7d349e1545efbf1663db6fe48039bbb08c961 · mdn/css-examples · GitHub

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<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="utf-8" />
    <title>Sizing: percentages</title>
    <link rel="stylesheet" href="../styles.css" />
    <style>
      * {
        box-sizing: border-box;
      }

    </style>

    <style class="editable">
      .box {
        border: 5px solid darkblue;
        width: 50%;
      }
    </style>
  </head>

  <body>
    <section class="preview">
      <div class="box">
        I have a percentage width.
      </div>
    </section>

    <textarea class="playable playable-css" style="height: 120px;">
.box {
  border: 5px solid darkblue;
  width: 50%;
}
    </textarea>

    <textarea class="playable playable-html" style="height: 120px;">
<div class="box">
  I have a percentage width.
</div>
    </textarea>

    <div class="playable-buttons">
      <input id="reset" type="button" value="Reset" />
    </div>
  </body>
  <script src="../playable.js"></script>
</html>