What is $$phase in AngularJS?

Question

I found this code snippet which is part of a angular directive someone wrote for bootstrap modal.

//Update the visible value when the dialog is closed                


        

Answer 1

$$phase is a flag set while angular is in a $digest cycle.

Sometimes (in rare cases), you want to check $$phase on the scope before doing an $apply. An error occurs if you try to $apply during a $digest:

Error: $apply already in progress