Delay angularjs $watch response

delay-$watch

// Taken from: http://stackoverflow.com/questions/20397253/implement-a-delay-on-scope-watch
    
var timeoutPromise;
var delayInMs = 0;
vm.isEdit = false;
        
$scope.$watch(function () {
        return vm.editId;
    }, function (currentValue) {
        $timeout.cancel(timeoutPromise);  //does nothing, if timeout alrdy done
        timeoutPromise = $timeout(function() {
        vm.isEdit = currentValue;
        vm.submitLabel = currentValue ? 'Update Fabric' : 'Save New Fabric';
    }, delayInMs);
});