Hmm. Tabletop.js has been doing this for a good 4 years now. In what ways is this better?
Attila Vágó

Tabletop seems to be a mature library rich in features.
get-sheet-done is meant to be used for getting something up and running quickly, with as little effort and cognitive load as possible. 
As such it has simpler design and implementation which I hope make it simpler to use.
Smaller file size was not a goal, but is an added bonus.