yyx990803/zoomerang — pull request #15 by a-bashtannik (2014-06-17 22:52:58+00:00)
Title: Add 2 onBefore events

I added possibility to specify callback function for `onBeforeOpen` and `onBeforeClose` events, which are triggered before zoom-in and zoom-out resp.

It is useful, when you need to make something with target: specify classname, add some extra transition effects, etc.