simplemde sanitize safe example

<!-- This example shows how to use simpleMDE safely with DOMPurify when dealing with intrusted user input.
Strip out javascript before rendering Markdown to HTML -->

<link rel="stylesheet" href="https://cdn.jsdelivr.net/simplemde/latest/simplemde.min.css">

<script src="https://cdn.jsdelivr.net/simplemde/latest/simplemde.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/marked/2.1.3/marked.min.js" integrity="sha512-AD+GG1nJKO4Je/Q8QsY1gM9/7o1QjpGe9W2Lrg1oGtEID/RX8bMKKZGgw/KOODkPXL6j74c6eJWAhE/3F2kKjA==" crossorigin="anonymous" referrerpolicy="no-referrer"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/dompurify/2.3.0/purify.min.js" integrity="sha512-FJzrdtFBVzaaehq9mzbhljqwJ7+jE0GyTa8UBxZdMsMUjflR25f5lJSGD0lmQPHnhQfnctG0B1TNQsObwyJUzA==" crossorigin="anonymous" referrerpolicy="no-referrer"></script>

<textarea id="mde"></textarea>
<script>
var simplemde = new SimpleMDE({
    element: document.getElementById('mde'), 
    previewRender: function(plain) {
        return DOMPurify.sanitize(marked(plain) , {USE_PROFILES: {html: true}} );
    },
});
</script>