before.html

<!DOCTYPE html>
<html lang="en" dir="ltr">
  <head>
    <meta charset="utf-8">
    <title>before web</title>
    <style media="screen">
      a::before{
        content:"\21d2 click here:";
        font-weight:bold;
      }

    </style>
  </head>
  <body>
    <ul>
      <li><a href="#">one link</a></li>
      <li><a href="#">another link</a></li>
      <li><a href="#">yet another link</a></li>
    </ul>
  </body>
</html>