web-cheat/katex.html

web-cheat/katex.html
<!doctype html>
<html lang=en>
<head>
<meta charset=utf-8>
<title>Client-side KaTeX</title>
<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/katex@0.16.21/dist/katex.min.css" integrity="sha384-zh0CIslj+VczCZtlzBcjt5ppRcsAmDnRem7ESsYwWwg3m/OaJ2l4x7YBZl9Kxxib" crossorigin="anonymous">
<script src="https://cdn.jsdelivr.net/npm/katex@0.16.21/dist/katex.min.js" integrity="sha384-Rma6DA2IPUwhNxmrB/7S3Tno0YY7sFu9WSYMCuulLhIqYSGZ2gKCJWIqhBWqMQfh" crossorigin="anonymous"></script>
<script src="https://cdn.jsdelivr.net/npm/katex@0.16.21/dist/contrib/mhchem.min.js" integrity="sha384-F2ptQFZqNJuqfGGl28mIXyQ5kXH48spn7rcoS0Y9psqIKAcZPLd1NzwFlm/bl1mH"  crossorigin="anonymous"></script>
</head>
<body>
</body>
<script>
document.getElementsByTagName('body')[0].innerHTML = katex.renderToString('\\frac{1}{\\sqrt{2}}\\\\\n\\ce{H2O}')
</script>
</html>