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Mastering React Native by Jacob Friedmann, Eric Masiello

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Installing Watchman and Flow

Next up are Watchman and Flow. Again, Flow is entirely optional. If you wish to experiment with it, you're welcomed to install it. It won't hurt anything. If you'd rather skip it for now, that's totally fine as well.

From the terminal, run brew install watchman:

Installing Watchman and Flow

And if you wish, run brew install flow.

Installing the React Native CLI

Okay! We're almost done with installing everything. There's just one more it we need: the React Native CLI. Again, from the terminal, run npm install -g react-native-cli. Using npm, this will globally (-g) install the React Native CLI that you'll use to scaffold your React Native applications. ...

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