How to use "ng-if" in widget Service Portal ServiceNow?

HTML

<div>
  <div class="btn btn-default m-b" ng-if="data.state== '2' " ng-click="c.Popup()">
    <img src="workingcode.in">
  </div>
  <br>
</div>

Client Controller

function() {
  /* widget controller */
  var c = this;
 c.data.state= 2;
}

Output