Animated.event() with useNativeDriver returns an object, not a function

Is this a bug report?

Yes

Have you read the Contributing Guidelines?

Yes

Environment

Environment: OS: macOS Sierra 10.12.6 Node: 7.8.0 Yarn: 1.0.1 npm: 4.2.0 Watchman: 4.7.0 Xcode: Xcode 9.0 Build version 9A235 Android Studio: Not Found

Packages: (wanted => installed) react: 16.0.0-beta.5 => 16.0.0-beta.5 react-native: 0.49.1 => 0.49.1

Target Platform: iOS (11)

Steps to Reproduce

I just hit https://github.com/facebook/react-native/issues/13377 but with onScroll on a ScrollView. This line checks if I have used useNativeDriver, and if so, returns the AnimatedEvent object, not a function. Therefore, any prop expecting a function – onScroll, onPanResponderMove or any other – will throw an error.

Is this a bug or expected behaviour? If useNativeDriver cannot be used with any prop expecting a function, this should be documented.

[marcesengel]

Hi, are you using an Animated.ScrollView?

[marcesengel]

You’re welcome 👍 it already says so in the docs, look closer at the given example - but you’re right, it’s a tiny detail easy to overlook. Highlighting might help there. Happy to have helped 😃