<html>
    <head>
        <title>Angular 2 QuickStart</title>

        <!-- 1. Load libraries -->
        <script src="node_modules/angular2/bundles/angular2-polyfills.js"></script>
        <script src="node_modules/systemjs/dist/system.src.js"></script>
        <script src="node_modules/rxjs/bundles/Rx.js"></script>
        <script src="node_modules/angular2/bundles/angular2.dev.js"></script>

        <!-- 2. Configure SystemJS -->
        <script>
            System.config({
                packages: {
                    app: {
                        format: "register",
                        defaultExtension: "js"
                    }
                }
            });

            System
                .import("app/boot")
                .then(null, console.error.bind(console));
        </script>

    </head>

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

<html>
    <head>
        <title>Angular 2 QuickStart</title>

        <!-- 1. Load libraries -->
        <script src="node_modules/angular2/bundles/angular2-polyfills.js"></script>
        <script src="node_modules/systemjs/dist/system.src.js"></script>
        <script src="node_modules/rxjs/bundles/Rx.js"></script>
        <script src="node_modules/angular2/bundles/angular2.dev.js"></script>

        <!-- 2. Configure SystemJS -->
        <script>
            System.config({
                defaultJSExtensions: true,
                packages: {
                    app: {
                        format: "register",
                        defaultExtension: "js"
                    }
                }
            });

            System
                .import("release/boot")
                .then(null, console.error.bind(console));
        </script>

    </head>

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

Define the defeault extension to true to avoid running into a bug in this version of systemjs
Define the defeault extension to true to avoid running into a bug in this version of systemjs
