GetComponentProps.d.tsx

type GetComponentProps<T> = T extends React.ComponentType<infer P>
  ? P
  : T extends (props: any) => any
  ? Parameters<T>
  : never;


class ClassComponent extends React.Component<{ a: number }> {
  render() {
    return <div />;
  }
}

const FunctionalComponent = (props: { v: string }) => {
  return <div />;
};

type a = GetComponentProps<typeof ClassComponent>;
type b = GetComponentProps<typeof FunctionalComponent>;