Is there a way to render html in CodeMirror textarea?

For example, i would like to set value of textarea to “-mark- Hello world! -/mark-”, and then click on button “render” to render this html inside of textarea, so only marked “Hello world!” remains. Is this possible in CodeMirror?
I’ve changed < to -, because it doesn’t show html

You could write code that strips out the HTML and then only put the text into the editor, but no, CodeMirror itself won’t do this.