<h1><code ng:non-bindable="">ngChange</code>
<span class="hint">(directive in module <code ng:non-bindable="">ng</code>
)</span>
</h1>
<div><h2 id="Description">Description</h2>
<div class="description"><p>Evaluate given expression when user changes the input.
The expression is not evaluated when the value change is coming from the model.</p>

<p>Note, this directive requires <code>ngModel</code> to be present.</p></div>
<h2 id="Usage">Usage</h2>
<div class="usage">as element (see <a href="guide/ie">IE restrictions</a>)<pre class="prettyprint linenums">&lt;ng-change&gt;
&lt;/ng-change&gt;</pre>
</div>
<h2 id="Example">Example</h2>
<div class="example"><h3>Demo Source Code</h3>
<div source-edit="" source-edit-deps="angular.js script.js" source-edit-html="index.html-113" source-edit-css="" source-edit-js="script.js-112" source-edit-unit="" source-edit-scenario="scenario.js-114"></div>
<div class="tabbable"><div class="tab-pane" title="index.html">
<pre class="prettyprint linenums" ng-set-text="index.html-113" ng-html-wrap=" angular.js script.js"></pre>
<script type="text/ng-template" id="index.html-113">
  
  <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>
</script>
</div>
<div class="tab-pane" title="script.js">
<pre class="prettyprint linenums" ng-set-text="script.js-112"></pre>
<script type="text/ng-template" id="script.js-112">
    function Controller($scope) {
      $scope.counter = 0;
      $scope.change = function() {
        $scope.counter++;
      };
    }
  </script>
</div>
<div class="tab-pane" title="End to end test">
<pre class="prettyprint linenums" ng-set-text="scenario.js-114"></pre>
<script type="text/ng-template" id="scenario.js-114">
  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');
  });
</script>
</div>
</div><h3>Demo Source Code</h3>
<div class="well  doc-example-live" ng-embed-app="" ng-set-html="index.html-113" ng-eval-javascript="script.js-112"></div></div>
</div>
