How do I highlight specific words as they are written, with javascript/jquery?

I'm looking for a script whereas words written in my textarea beginning with a "#" is to be highlighted in realtime, as they are written. ex: The cutest #animals ever.

Any开发者_运维百科 help with this problem is appreciated. Thank you.

---

You can't highlight things in a textarea. So your question is probably moot.

You could I suppose recreate an input box using a div and capturing keystrokes but it would be a huge amount of work.

Or you could do like this site does: Type in the textarea, and show the result under it.