How to subscribe on property change when using controller as syntax?
controller('TestCtrl', function ($scope) {
this.name = 'Max';
this.changeName = function () {
this.name = new Date();
}
// not working
$scope.$watch("name",function(value){
console.log(value)
});
});
<div ng-controller="TestCtrl as test">
<input type="text" ng-model="test.name" />
<a ng-click="test.changeName()" href="#">Change Name</a>
</div>
Just bind the relevant context.
$scope.$watch(angular.bind(this, function () {
return this.name;
}), function (newVal) {
console.log('Name changed to ' + newVal);
});
Example: http://jsbin.com/yinadoce/1/edit
UPDATE:
Bogdan Gersak's answer is actually kind of equivalent, both answers try binding this with the right context. However, I found his answer cleaner.
Having that said, first and foremost, you have to understand the underlying idea behind it.
UPDATE 2:
For those who use ES6, by using arrow function you get a function with the right context OOTB.
$scope.$watch(() => this.name, function (newVal) {
console.log('Name changed to ' + newVal);
});