javascript - How to use $scope.$watch on TypeScript -

i want watch element binding component. value may change(in component) because makes asynchronous call (promise). until in js use $scope.$watch , when binding element change has callback , can continue value of element.

example of js:

$scope.$watch('myctrl.mylayout', function (newval, oldval) {                 console.log('layout is:');                 console.log(_this.mylayout);             });    angular.module('blocks.ui')     .component('myform', {         templateurl: 'app/blocks/ui/form.html',         controller: myform,         controlleras: 'myctrl',         bindings: {             mylayout: '='         }     }); 

the question how implement same thing using "clean" typescript syntax (i know can inject $scope , implement $scope.$watch on typescript in same way).

thanks.

the solution using typescript & set

private _mylayout:any;  public mylayout() {    return this._mylayout; }  public set mylayout(newitem: any) {     this._mylayout = newitem;     console.log('layout is:');     console.log(this.mylayout); }