Question 1

How to add custom validation in react-native-form-builder?

Accepted Answer

Define a function that returns an object with 'error' and 'errorMsg', then pass it as the customValidation prop. The README provides an example function for validating username and password fields.

Question 2

react-native-form-builder vs Formik for React Native, which should I use?

Accepted Answer

react-native-form-builder is better if you're using NativeBase and want quick, styled forms with built-in keyboard handling. Formik is more flexible and headless, suitable for custom UI and complex state management, but requires more setup.

Question 3

Can I use react-native-form-builder without NativeBase?

Accepted Answer

No, it requires NativeBase as a peer dependency for its UI components. If you're not using NativeBase, you'll need to integrate it or consider alternative form libraries.

Question 4

How to handle nested forms in react-native-form-builder?

Accepted Answer

Use a field with type 'group' and include a 'fields' array within it. This creates a nested object in the form values, as shown in the 'Nested Forms' section with an address example.

Question 5

What are the alternatives to react-native-form-builder for React Native?

Accepted Answer

Alternatives include React Hook Form for performance and flexibility, Formik for extensive ecosystem, and the author's own React Reactive Form for advanced features. Choose based on your UI library and complexity needs.

Question 6

Is react-native-form-builder still maintained?

Accepted Answer

The README notes a 'better' alternative (React Reactive Form), suggesting this library may not be actively developed. Check the GitHub repo for recent commits or issues to confirm current status.

react-native-from-builder

What is react-native-from-builder?

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