TypeError when calling handleSubmit in react-native

Bug

Current Behavior

The recommended usage of formik in react native is: <Button onPress={props.handleSubmit} />. However, when using typescript, the type of event that handleSubmit accepts is different than what react-native’s onPress generates.

Desired Behavior

Formik’s handleSubmit should take a GestureResponderEvent in addition to React.FormEvent<HTMLFormElement>.

Suggested Solutions

This branch fixes this issue: https://github.com/Shurelia/formik/tree/handleSubmit-fix Unfortunately, there is a typings conflict between @types/node and @types/react-native which prevents the build. Since the only type used from node was process, I’ve manually declared that as any and removed @types/node. Not an elegant solution, and I’d be open to working on it more if the maintainers are okay with removing @types/node from the project (and perhaps manually declaring process?).

Info

• Formik Version: 0.10.5
• OS: Windows 10
• Node Version: 9.3.0
• Package Manager and version: yarn 1.3.2
• Typescript: 2.6.2
• react: 16.2.0
• react-native: 0.51.0

[wsdt]

For all coming here: The issue seems to be still open. If you simply want to remove the warning you can cast your object. It’s by far not the cleanest solution, but it’s better than nothing.

onPress={handleSubmit as any}

[vitalyiegorov]

@jaredpalmer Any valid solution for correct typing in react-native?