How do I make a textarea an ACE editor?

Question

I\'d like to be able to convert specific textareas on a page to be ACE editors.

Does anyone have any pointers please?

EDIT:

I have the the editor.htm

Answer 1

For anyone like me that just wants a minimal, working example of using Ace from the CDN:

  
function () { 
  console.log('this is a demo, try typing!')
}