index.html

<html>
  <head>
    <title>TypeScript React Hello World App</title>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1">

    <!-- 1. Load libraries -->
    <script src="node_modules/systemjs/dist/system.js"></script>

    <!-- 2. Configure SystemJS -->
    <script>
      SystemJS.config({
        baseURL: "/build",
        paths: {
          "react": '../node_modules/react/dist/react',
          "react-dom": '../node_modules/react-dom/dist/react-dom'
        }
      });
      System.defaultJSExtensions = true;

      System.import('hello.js').catch(function(err){ console.error(err);  });
    </script>
  </head>

  <!-- 3. Display the application -->
  <body>
    <my-app>Loading...</my-app>
  </body>
</html>