Um Hook em React Native é uma função que permite que um componente funcional tenha um estado interno e execute efeitos colaterais, sem a necessidade de criar componentes de classe.

O useState é um dos Hooks mais utilizados Ele permite manter um estado local em uma função de um componente funcional. Para usá-lo, declara-se uma variável e uma função de atualização de estado usando o useState Hook

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Wow, looks like a lot of duplication in https://github.com/constelation/monorepo/blob/master/packages/Style_/src/index.native.tsx compared to https://github.com/constelation/monorepo/blob/master/packages/Style_/src/index.tsx to handle differences in props on the different platforms such as backfaceVisibility.

And even structure/shape differences like:

const style = { ...styleFromProps, ...this.props.style, ...Child.props.style }

vs.

    propsToPass.style = [styleFromProps, this.props.style, Child.props.style]

Is there no way to remove this duplication?

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I think I was missing this step, as it isn't included in the warning message from the CLI anywhere.

error React Native CLI uses autolinking for native dependencies, but the following modules are linked manually: 
  - @react-native-firebase/app (to unlink run: "react-native unlink @react-native-firebase/app")
  - @react-native-firebase/auth (to unlink run: "react-native unlink @react-native-firebase/auth")
  - @react-native-firebase/database (to unlink run: "react-native unlink @react-native-firebase/database")
  - @react-native-firebase/firestore (to unlink run: "react-native unlink @react-native-firebase/firestore")
  - @react-native-firebase/storage (to unlink run: "react-native unlink @react-native-firebase/storage")
  - react-native-camera (to unlink run: "react-native unlink react-native-camera")
  - react-native-fs (to unlink run: "react-native unlink react-native-fs")
  - react-native-image-picker (to unlink run: "react-native unlink react-native-image-picker")
  - rn-fetch-blob (to unlink run: "react-native unlink rn-fetch-blob")
This is likely happening when upgrading React Native from below 0.60 to 0.60 or above. Going forward, you can unlink this dependency via "react-native unlink <dependency>" and it will be included in your app automatically. If a library isn't compatible with autolinking, disregard this message and notify the library maintainers.
Read more about autolinking: https://github.com/react-native-community/cli/blob/master/docs/autolinking.md

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Interesting React Native testimonial for a running 'showcase' app.

Looks like React Native is starting to be incorporated into the official FB app