title: How can I bind to element height and wathch it on window resize or another event using Angular?
body: <p>I have two elements .common and .userpanel
   1. I need to give to the .userpanel height of common div on load
   2. Keep binding on window resize event
   3. Keep binding on another event (for example, I increase the height of common div, when I run function to expand child elements)</p>