Fails to render using renderToStaticMarkup

[salzhrani]

Summary:

Fails when rendering using renderToStaticMarkup

Steps to reproduce:

call renderToStaticMarkup with react-modal anywhere in the tree

Expected behavior:

Link to example of issue:

https://codesandbox.io/s/rwnvq00p8p

Additional notes:

I have made a failing test here

[CodyReichert]

I think I hit this, and it is a react 16 issue. I originally filed this on enzyme, because I wasn't sure where the error was: enzymejs/enzyme#1351.

I also created a bin: https://www.webpackbin.com/bins/-KyxN3opuJwDmH4y-LBv

With react-dom 16, calling renderToStaticMarkup on the Modal component causes a crash. I'm not sure what the error is, but if you click that bin above you'll see it doesn't even load. In my test suite it just crashed PhantomJS and Chrome.

This happened only after upgrading to React 16 - React 15 was fine.