$$phase is a flag set while angular is in a $digest cycle.
Sometimes (in rare cases), you want to check $$phase on the scope before doing an $apply. An error occurs if you try to $apply during a $digest:
Error: $apply already in progress
$$phase is a flag set while angular is in a $digest cycle.
Sometimes (in rare cases), you want to check $$phase on the scope before doing an $apply. An error occurs if you try to $apply during a $digest:
Error: $apply already in progress