Angular UI router

<html>
  <head>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/angular.js/1.7.8/angular.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/angular-ui-router/1.0.22/angular-ui-router.js"></script>
    <script src="helloworld.js"></script>

    <style>.active { color: red; font-weight: bold; }</style>
  </head>

  <body ng-app="helloworld">
    <a ui-sref="hello" ui-sref-active="active">Hello</a>
    <a ui-sref="about" ui-sref-active="active">About</a>

    <ui-view></ui-view>
  </body>
</html>

/* Styles go here */

### Angular Starter Plunker - Typescript

var myApp = angular.module('helloworld', ['ui.router']);

myApp.config(function($stateProvider) {
  var helloState = {
    name: 'hello',
    url: '/hello',
    template: '<h3>hello world!</h3>'
  }

  var aboutState = {
    name: 'about',
    url: '/about',
    template: '<h3>Its the UI-Router hello world app!</h3>'
  }

  $stateProvider.state(helloState);
  $stateProvider.state(aboutState);
});