PropType validators error when an external lib bundles prop-types

[OscarBarrett]

If an external lib containing React components bundles prop-types the validators error is thrown when one of the components is used.

The solution (for webpack) is to add prop-types to externals in the webpack config and add it as a peerDependency.

This should probably be mentioned in the readme and/or in https://github.com/facebook/react/blob/master/docs/warnings/dont-call-proptypes.md

[gaearon]

Can you provide a standalone example demonstrating the issue? I don't fully understand what's going on.

[OscarBarrett]

I've created a simple example here.

[gaearon]

I think the issue occurs because you're using a production build of the library with a development build of React.

[gaearon]

Fixed this in prop-types@15.5.10. If a library whose UMD build you're using updates and rebuilds, this should no longer be an issue. Thank you so much for the reproducible example—I wouldn't have fixed it so quickly otherwise.