add watch on a non scope variable in angularjs

Question

Is there a way to add watch to a non scope variable. I want to add a watch to local variable. I have something like this

 function EditAssetRegistryController(as         


        

Answer 1

A cleaner syntax using ES6

$scope.$watch(() => {
    return this.thingToWatch;
}, (newVal, oldVal) => {
    // Your code here...
});