Not compatible with latest Flow (React)

This is a:

• Bug Report
• Feature Request
• Question
• Other

Which concerns:

• flow-runtime
• babel-plugin-flow-runtime
• flow-runtime-validators
• flow-runtime-mobx
• flow-config-parser
• The documentation website

---

What is the current behaviour?

Flow >=0.53.0 modified how React classes are defined. Instead of 3x type arguments (DefaultProps, Props, State), there are only 2x type arguments (Props, State).

As-is, flow-runtime incorrectly maps Props => DefaultProps and State => Props, resulting in incorrect warnings/errors.

https://flow.org/en/docs/react/components/ https://medium.com/flow-type/even-better-support-for-react-in-flow-25b0a3485627

[amilajack]

Testing a fix for this here: https://github.com/amilajack/babel-plugin-flow-runtime Installation:

# npm
npm install --save-dev github:amilajack/babel-plugin-flow-runtime
# yarn
yarn add --dev github:amilajack/babel-plugin-flow-runtime

[cbazureau]

Hello, thanks @amilajack, i’ve applied your patch on a flow-runtime fork for better reading : https://github.com/cbazureau/flow-runtime/commit/8d8fd5b4a34ad0b1b7782fd11fd5d08bd933a015

Linked issue : https://github.com/facebook/flow/issues/5029