Examples

Rich Text Editor in a Form

Name: RichTextEditor
Price: 129 USD
Author: Richscripts Inc.

Create the editor on a <textarea name="…">. The editor replaces it on screen and keeps its value filled as the user types, so the HTML posts with the other fields.
Content you set from code with setHTMLCode() is not copied until the user edits, so copy getHTMLCode() into the field in your submit handler.
required does not work on the hidden textarea. Check getCharCount() instead, as this form does.
Clean the posted HTML on the server before you store it.

<form id="ticket" method="post" action="/tickets">
    <input name="subject" required>
    <textarea id="body" name="body"></textarea>
    <button type="submit">Send</button>
</form>
<script>
    // Pass the textarea: the editor replaces it and keeps it filled as the user types.
    var editor1 = new RichTextEditor("#body");

    document.getElementById("ticket").addEventListener("submit", function (e) {
        // Copy once more on submit, which also covers content set with setHTMLCode().
        document.getElementById("body").value = editor1.getHTMLCode();

        if (editor1.getCharCount() < 20) {
            e.preventDefault();
            alert("Please describe the problem in at least 20 characters.");
        }
    });
</script>