For instance, I have a form with various input fields:
<form>
<input type="text" ng-model="$ctrl.inputText">
<input type="number" ng-model="$ctrl.inputNumber">
</form>
Since my app is component-based, I need to trigger an event in my controller whenever the data in these inputs changes. The $onChanges method only responds when the bound variable changes and does not detect changes within the template.
If you want to implement a change event in AngularJS, you can simply utilize the ng-change directive
var myComponent = {
scope: {},
bindings: {},
controller: function() {
this.inputText = "boo";
this.inputNumber = 666;
this.changeEvent = function(val) {
console.log("change event" + val);
}
},
template: [
'<form>',
'<input type="text" ng-model="$ctrl.inputText" ng-change="$ctrl.changeEvent($ctrl.inputText)">',
'<input type="number" ng-model="$ctrl.inputNumber">',
'</form>'
].join('')
};
angular.module('myApp', []);
angular
.module('myApp')
.component('myComponent', myComponent);<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.5.6/angular.min.js"></script>
<div ng-app="myApp">
<my-component></my-component>
</div>Within the Controller:
$scope.$watch("myForm.$dirty", function() {
$scope.myForm.$setPristine();
});
HTML Form:
<form name="myForm">
<input type="text" ng-model="$ctrl.inputText">
<input type="number" ng-model="$ctrl.inputNumber">
</form>
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