JSFiddle - React, Tailwind, and code Playground

HTML

<div ng-app="testApp" ng-controller="testC">
    <div ng-if="['A','B','C'].indexOf(test)+1">
        <p>Hello World!</p>
    </div>
</div>

JavaScript

angular.module('testApp', [])
    .controller('testC', function($scope){        
        $scope.test = 'A';        
    });