ReactDOM findDOMNode is deprecated

[wereHamster]

https://reactjs.org/docs/react-dom.html#finddomnode

The findDOMNode() function call (and dependency on react-dom) has been added in 34774f9.

AFAIU the code, findDOMNode() shouldn't be needed, you can compare the current ref with the active element directly, since the type of ref.current extends Element:

  if (ref.current === null || document.activeElement === ref.current) {

[JohannesKlauss]

Good catch, should be just fine. I'll release a fix in a few minutes.

[JohannesKlauss]

Fixed in 2.2.1