TS PropType extractor

Extract ambient TypeScript declarations from components with proptypes.

Usage

Install it:

$ yarn add ts-proptype-extractor

Use it:

$ npx ts-proptype-extractor some-component-library output.d.ts

The first argument is the name of the library you want to extract types from - this library and any dependencies must be installed, as the tool will require it.

The second argument is the path to the output file.

The tool will iterate over every export, and if it has a propTypes property, it will output a declaration for the component and an interface for the properties.

E.g., given the following component:

const MyComponent = (props) => (<div className={props.className}>
  Good {props.time}, {props.name}!
</div>);

MyComponent.propTypes = {
  className: PropTypes.string
  time: PropTypes.oneOf(['morning', 'afternoon']).isRequired,
  name: PropTypes.string.isRequired
};

The following definition will be output:

export interface MyComponentProps {
  className?: string;
  time: 'morning' | 'afternoon';
  name: string;
}

export const MyComponent: React.StatelessComponent<MyComponentProps>;

Notes

I hacked this together in an hour for a specific use case, so there are probably a bunch of things that don't work (yet). Pull requests are very much welcome.