If you like this and are interested in a less hacky way, I've also implemented it using a Service Worker[1] that intercepts and transpiles modules on-the-fly.

If you like this and are interested in a less hacky way, I've also implemented it using a Service Worker[1] that intercepts and transpiles modules on-the-fly. [1]: https://github.com/stagas/tssw https://github.com/stagas/tssw