Add TypeScript definitions for React

[chrisparton1991]

Hi, thanks for all your work on this awesome library!

This PR adds TypeScript support for the React subproject. I've added a Rollup plugin to copy the type definitions to dist, where they are referenced by package.json.

All tests are passing and the build succeeds.

[Grsmto]

Hi Chris,
That's awesome, good job.
Do you think the "right way" of doing this wouldn't be to do a PR to https://github.com/DefinitelyTyped/DefinitelyTyped instead of having the typings directly in here? I think that's how the TS community used to do. What do you think?

[chrisparton1991]

Thanks, in my experience there's a split between libraries that contain their own type definitions and ones that use DefinitelyTyped.

For my current project, I'm using DefinitelyTyped for Jest, Lodash and React. Other libraries (Axios, Material UI, PIXI etc.) contain their own typings.

From an org member of DefinitelyTyped: "In an ideal world the definitions would be maintained by the library authors, but alas many do not care for TypeScript"

So for me, the ideal is to have the typings directly in the repo (which also means one less NPM dependency), but I'm totally happy to put them in DefinitelyTyped if you'd prefer they go there!

[Grsmto]

Ok thanks for your explanation. I'm on vacations right now but will take a look when I'm back.
Good job!

[chrisparton1991]

Thanks, enjoy your vacation!

[Grsmto]

Merging, thanks!

[chrisparton1991]

Thanks, much appreciated! Hope you had a nice holiday.