Yes, the I believe the codemirror plugin does this (and more). You find it in the plugin library.
In general, you can't style content in a textarea but there are tricks like this; http://codersblock.com/blog/highlight-text-inside-a-textarea/ <:-) -- You received this message because you are subscribed to the Google Groups "TiddlyWiki" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/tiddlywiki. To view this discussion on the web visit https://groups.google.com/d/msgid/tiddlywiki/5fd1423c-cb3a-44c4-9291-1c5948889bb7%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.

