Upgrade to react@15.4.0

[MoOx]

This patch solves the following problem

I tried to update react to latest 15.4.0 to be able to use jest without this blocking issue but it seems RNW use some /lib/* stuff.

Test plan

I just upgraded all reference to react-dom. With react 15.4.0, some lib/* redundant in both react and react-dom packages but I think it's better to rely on a single package so I just switched all references to react/lib/ to react-dom/lib/ and it worked.

This pull request

• includes documentation
• includes tests
• includes an interactive example
• includes screenshots/videos

Note: Tests were breaking before this update, with the changes included in this PR they pass.

[necolas]

I tried this locally and found that the touchables stopped working in the examples.

[necolas]

The problem seems to be that the topLevelType in ResponderEventPlugin - used to be topMouseDown or topTouchStart but is now topClick. The isStartish helper now returns false (because it's only check for mouse/touch events) in 15.4 where it used to return true.

[necolas]

Sigh. Because React@15.4.0 is going to be a giant ball of pre-built code, we might need to update the usage instructions to suggest aliasing 'react' to 'react/lib/React'. I think this will let your bundler de-dupe all the modules shared between 'react' and 'react-dom'.

[remon-nashid]

Thanks for your effort to make the upgrade work. Upgrading is especially necessary because running jest tests while using react < 15.4 is currently impossible.

[necolas]

IIRC, not impossible if you include jest.mock('react-dom'). I'm waiting for a patch to React to fix the ResponderEventPlugin

[remon-nashid]

I just realised that @MoOx has raised the issue originally for the same purpose. Thanks for the tip @necolas. Hopefully we get a feedback about facebook/react#8370 soon.

[nicholeuf]

Any idea when this will get merged?

[necolas]

When facebook/react#8370 is resolved

[necolas]

@MoOx would you mind rebasing and updating the branch. May make it easier to debug the (possible) React issue.

[MoOx]

PR updated.

(There are some changes in the yarn.lock file, I guess it's normal since we changed some packages - I just "yarn"ed once before running the tests).