typescript_to_flow

Create a Flow Library Definition from a 3rd party library using typescript.

Typescript library to single d.ts definition file

• https://github.com/SitePen/dts-generator
• (sudo) npm i -g typescript
• (sudo) npm i -g dts-generator
• Clone the library you want to port
• dts-generator --name library-name --project /path/to/library --out library-name.d.ts

d.ts definition file to Flow Library Definition

• https://github.com/joarwilk/flowgen
• (sudo) npm i -g flowgen
• flowgen library-name.d.ts -o library-name.js

Usage of the Flow Library Definition

• https://flow.org/en/docs/libdefs/
• Create a folder /flow-typed in your project that uses flow
• Copy library-name.js there and it is ready to use
• https://github.com/flowtype/flow-typed
• If your ported definition really works, consider a pull request to the flow-typed repo.

Troubleshooting

• joarwilk/flowgen#15