can not use $watch on model

[sbluday]

$scope.$watch('modelName', function(newVal, oldVal){
	console.log(newVal);
});

Doesn't print any value! How do you get a callback on value change?

[koreem]

<toggle-switch ng-model="switchStatus" ng-change="switchStatusChanged(switchStatus)"></toggle-switch>

function switchStatusChanged(status) { console.log(status); }