implement ngOnChanges life cycle

[Hotell]

So you don't have to use $scope never ever again! :)

it should work like angular 2 https://angular.io/docs/ts/latest/api/core/OnChanges-interface.html

@Component({
  selector: 'my-cmp',
  template: `<p>myProp = {{$ctrl.myProp}}</p>`
})
class MyComponent implements OnChanges {
  @Input() myProp: any;

  ngOnChanges(changes: {[propName: string]: SimpleChange}) {
    console.log('ngOnChanges - myProp = ' + changes['myProp'].currentValue);
  }

}

under the hood it should use probably $scope.watchGroup for perf reasons

[Hotell]

POC:

https://jsbin.com/pobipik/10/edit?js,output