Generate Typescript and Flow type definitions from existing prop-types.

[girishla]

Are there any plans on providing Typescript type definitions ?

[interactivellama]

There is nothing on the roadmap for *.d.ts files at this time. I'm open to them being added. We would probably need to add some tests that validate them, so that they don't get out of date.

[interactivellama]

How can we do this based on propTypes in an automated way?

Also provide Flow typed definitions.

[futuremint]

I tried using dts-gen from Microsoft last week to create Typescript definitions but couldn't get it working using their basic CLI usage on our npm library.

However I'm sure it'll be straightforward to write up a script that uses the source files to generate type definition files from the PropTypes we've already written.

[davidlygagnon]

There is this codemod available to generate flow types from prop-types : https://medium.com/netscape/react-proptypes-to-flow-codemod-9757f5ec5381

. Only caveat is it seems to also removes prop-types... Never used it before but maybe there's a flag that can be passed to leave prop-types as is when converting.

I know I've used this: https://github.com/joarwilk/flowgen before to convert TypeScript defs to flow types, (but that's assuming we have TypeScript defs).

[interactivellama]

We might be able to use something from react-docgen AST parser if we need to do something custom.

[futuremint]

I'm going to work on adding a typedef file in October. I will also look into generating a library definition for flow as well.