React-bootstrap: React 16 Modal

[jaynakus]

There is an error when switching to react 16.0.0

Uncaught TypeError: Cannot read property 'contains' of undefined
    at eval (contains.js:17)
    at Modal.focus (Modal.js:557)
    at Modal.onShow (Modal.js:486)
    at Modal.componentDidUpdate (Modal.js:243)
    at commitLifeCycles (react-dom.development.js:11563)
    at commitAllLifeCycles (react-dom.development.js:12342)
    at HTMLUnknownElement.callCallback (react-dom.development.js:1319)
    at Object.invokeGuardedCallbackDev (react-dom.development.js:1358)
    at invokeGuardedCallback (react-dom.development.js:1215)
    at commitAllWork (react-dom.development.js:12463)

[taion]

dupe of a bunch of older issues; see earlier issues here and on react-overlays