title: angularjs disable does not work
body: <p>Why doesnt the ng-disabled work in my code?
  I have created a plunker.. any suggestions?</p>
  
  <p><a href="https://plnkr.co/edit/j2LnhLxBe5gHPITMqzUJ?p=preview" rel="nofollow noreferrer">https://plnkr.co/edit/j2LnhLxBe5gHPITMqzUJ?p=preview</a></p>
  
  <pre><code>&lt;ul ng-repeat="permission in permissions" ng-click="permission.assigned=!permission.assigned"&gt;
    &lt;a class="list-group-item" ng-class="{active: permission.assigned, disable: permission.name=='default'}"&gt;
      &lt;div class="row"&gt;
        &lt;div class="col-md-3"&gt;
          &lt;input type=checkbox aria-label="checkbox" ng-model="permission.assigned" ng-click="$event.stopPropagation()"&gt;
        &lt;/div&gt;
        &lt;div class="col-md-4"&gt;{{ permission.name }}&lt;/div&gt;
        &lt;div class="col-md-6"&gt;{{ permission.description }}&lt;/div&gt;
      &lt;/div&gt;
    &lt;/a&gt;
  &lt;/ul&gt;
  </code></pre>