Flow: Document the `ReactClass` type

[armandabric]

In the React HOC documentation you use the ReactClass type. No document exists on this special type.

Could you please add some documentation on it?

[gre]

see https://github.com/facebook/flow/blob/master/lib/react.js#L90

[vkurchatkin]

Probably it's better to wait until it's fixed, it doesn't really work at the moment

[steida]

I can understand not everything is working yet, but a short explanation would save thousands of developers.

[asolove]

ReactClass is dead. Long live ReactClass.

[Zhouzi]

I was expecting to find the proper type to use here so I thought I'd share it for others with the same expectation.

React.ComponentType<Props>

This is the type you want to use for functions that receive or return React components such as higher-order components or other utilities.

[arjun-menon]

@Zhouzi I think it should be React$ComponentType<Props>.

For a full list of non-public built-in Flow types, c.f. https://www.saltycrane.com/flow-type-cheat-sheet/latest/