JSFiddle - React, Tailwind, and code Playground

HTML

<div ng-app>
  <div ng-controller="TodoCtrl">
    <ul>
      <a ng-href="#" ng-click="flag = !flag;" ng-init="data = (flag == true) ? 'Value For Success' : 'Value for false'; "> {{data}} 
        </a><br/>
        Flag is -- {{flag}}
    </ul>

  </div>
</div>

JavaScript

function TodoCtrl($scope) {
  $scope.flag = true;
}