typescript declaration of act should match React 16.9.x

[davidje13]

Since 16.9.0 was released with a fix for facebook/react#14769, act returns a Promise (and optionally takes in a Promise).

This line should be updated to allow this, or better yet, it should forward the type typeof act from @types/react-dom (see here, though I'm not sure if that's 100% correct since I think it is now allowed to pass in a promise).

Right now the workaround is to import act directly from react-dom (since act here is just a pass-through), or to define:

function asyncAct(fn: () => Promise<any> | void): Promise<void> {
  return act(fn) as any as Promise<void>;
}

[kentcdodds]

🎉 This issue has been resolved in version 9.1.1 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

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