转换不同元素中的文本 - 在线编辑器

          <!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <style>
    p.uppercase {
      text-transform: uppercase;
    }

    p.lowercase {
      text-transform: lowercase;
    }

    p.capitalize {
      text-transform: capitalize;
    }
  </style>
</head>

<body>
  <p class="uppercase">This is some text.</p>
  <p class="lowercase">This is some text.</p>
  <p class="capitalize">This is some text.</p>
</body>
</html>
        