An example of using Sandpit with ES5, in case you'd prefer to avoid ES6.
Clone, install the dependencies, and fire it up:
git clone https://github.com/sandpit/sandpit-es5.git
cd sandpit-es5
npm install
Have a delicious soda. You're doing great. Then:
npm start
It'll likely be at port 8080 (http://localhost:8080), and it's powered by Webpack.
You can find out more about Sandpit at sandpitjs.com, or via the Github repo.