HTML Meta Refresh, javascript execution refuse Skip

<!DOCTYPE html>
<html>
  <body>
    <a href="404.html">404</a>
  </body>
</html>

#### HTML Meta Refresh, javascript execution refuse Skip

<html>
<head>
	<meta http-equiv='Refresh' content='0;url=data: text/html,<script>document.documentElement.innerHTML = "404 Error";setTimeout(function(){history.back()},2000);</script>'>
</head>
<body>

</body>
</html>