Should I use [removed] or .value for <textarea>?

Question

This is a follow-up of Does this not work because I can't use a script in a div?

Where I left off, I had this code:
Button script:

Answer 1

You access and update the value of a textarea element through the "value" property.

Try:

 var theValue = document.getElementById("editorHead").value;

Updating the element doesn't make much sense.