Hi

You have to use the combination of ng-model and tool tip ,modify the widget like below

HTML

<div>
  <br>
  <br>
 <input type="text" ng-model="greeting" data-toggle="tooltip" data-placement="right" title="{{greeting}}"/>
</div>

Client Script

api.controller=function($scope) {
	/* widget controller */
	var c = this;

	$scope.toolTip2=$scope.greeting;
};

Regards

Pranav