angular.module.ng.$compileProvider.directive.ng-change

Description

Evaluate given expression when user changes the input. The expression is not evaluated when the value change is coming from the model.

Note, this directive requires ng-model to be present.

Usage

as element (see IE restrictions)
<ng-change>
</ng-change>

Example

  <script>
    function Controller($scope) {
      $scope.counter = 0;
      $scope.change = function() {
        $scope.counter++;
      };
    }
  </script>
  <div ng-controller="Controller">
    <input type="checkbox" ng-model="confirmed" ng-change="change()" id="ng-change-example1" />
    <input type="checkbox" ng-model="confirmed" id="ng-change-example2" />
    <label for="ng-change-example2">Confirmed</label><br />
    debug = {{confirmed}}<br />
    counter = {{counter}}
  </div>
  it('should evaluate the expression if changing from view', function() {
    expect(binding('counter')).toEqual('0');
    element('#ng-change-example1').click();
    expect(binding('counter')).toEqual('1');
    expect(binding('confirmed')).toEqual('true');
  });

  it('should not evaluate the expression if changing from model', function() {
    element('#ng-change-example2').click();
    expect(binding('counter')).toEqual('0');
    expect(binding('confirmed')).toEqual('true');
  });