Codemirror Highlighting Active Line along with Line Numbers
Quick Demonstration showing how you can highlight the active line in codemirror code editor (the editor that we use on CSSDeck for all html, css, js code boxes).
Also line number only shows for the active line in the gutter.
I was considering using this feature on this site, but unfortunately it lags on Firefox (I hate firefox :|). Chrome as usual is perfectly fine with it. Opera is a little slower, but way more better than FX.