Is there a way to trim art boards in illustrator like in photoshop?

I will find myself often resizing art boards in illustrator when Im designing websites (if a page needs to be longer or shorter) and wanted to know if there is a way to trim away transparent pixels on an art board just like in photoshop. Right now I just use the art board tool to resize it manually but if theres a quicker way Im all ears. It would be quite a nifty tip to know