JSFiddle - React, Tailwind, and code Playground

HTML

<div ng-app="myApp" ng-controller="MyController">
    <p>
        {{say()}}
    </p>
</div>

JavaScript

angular.module('myApp', [])
    .factory('myService', function () {
        return {
            say: function () {
                return "Hello World";
            }
        }
    });
        
function MyController($scope, myService){
    $scope.say = myService.say;
}