添加这些文件的头部会给你Angular2的最新工作版本。

Adding these files to the head will give you the latest working version of Angular2.

<script src="https://github.jspm.io/jmcriffey/bower-traceur-runtime@0.0.87/traceur-runtime.js"></script>
<script src="https://jspm.io/system@0.16.js"></script>
<script src="https://code.angularjs.org/2.0.0-alpha.26/angular2.dev.js"></script>

来源： Angular.io：5分钟快速入门