Develop a shim for the Temporal proposal, exposing a Moment-like interface

[ptomato]

Originally from tc39/proposal-temporal#104

Temporal subsumes most of the functionality of Moment.js, but there's a ton of code out there using Moment, and it will take a long time to upgrade to the Temporal API. To make the transition easier, while reducing download size, it'd be great to have an implementation of most of the Moment API in terms of Temporal, if this is possible. Same for Luxon or date-fns.

Link to some experimentation with date-fns: https://github.com/ptomato/temporal-fns/commits/port-to-temporal

[fabon-f]

I'm developing vremel, date utility library for Temporal API (which is heavily inspired by date-fns). It's not a shim and its target is not a compatibility with date-fns, functions accept and return Temporal objects, but most functions behave similarly. So I think migration from date-fns itself will not be so hard.

But I feel that paradigm shift from legacy Date to Temporal API can be very tough for many developers, especially when they deal with an existing large codebase.

[ptomato]

That's great! I will follow that repo.

Would you like to make a PR for the tc39/proposal-temporal README mentioning it?