Ask HN: Elm-like JavaScript framework?

A company hired me to to add a major feature to an existing product. I'm free to choose whatever front-end framework I like, but I'm not sure introducing a new (functional) language in this organization would be a good idea.

I'm impressed by elm's simplicity, and I'd like to structure this feature in a similar fashion. Do any of you know of existing frameworks which implement this approach?

I'd prefer light frameworks over heavier ones.

Thanks a lot!