propType for accepting a component as a prop?

This seems to be most up to date: https://stackoverflow.com/a/55784547/4993912

TLDR;

const propTypes = {
    component: PropTypes.elementType,
    requiredComponent: PropTypes.elementType.isRequired,
};

I crossposted to github and got this answer. So it should be:

const componentType = PropTypes.oneOfType([PropTypes.string, PropTypes.func])

func covers types from "classic" react components, ES6 classes, and stateless function components. string covers the native element case (eg "div").