<!DOCTYPE html>
<title>Dynamic manipulation of textarea.wrap</title>
<link rel=help href=https://html.spec.whatwg.org/multipage/#dom-textarea-wrap>
<link rel=author title=Ms2ger href=mailto:ms2ger@gmail.com>
<textarea wrap=off cols=20>01234567890 01234567890 01234567890</textarea>
<script>
document.getElementsByTagName("textarea")[0].wrap = "soft";
</script>