Consider `map` and `flatMap`?

[jaredramirez]

Thanks for the great bindings!

Have you considered adding flatMap (with the same definition as then) and map (with the same definition as thenResolve)? These names seem to be more inline with the naming conventions that Belt is using.

[ryyppy]

Related discussion on why we decided against this naming can be found in the original announcement thread: https://forum.rescript-lang.org/t/rfc-new-promise-binding/963