findDOMNode is deprecated and will be removed in the next major release.

报错

Warning: findDOMNode is deprecated and will be removed in the next major release. Instead, add a ref directly to the element you want to reference. Learn more about using refs safely here: https://reactjs.org/link/strict-mode-find-node

简单来说，不用管这个报错。

下个主版本这个findDOMNode将被废弃。

按照别人的说法，这玩意只是一个警告。
我觉得挺逆天的，react把警告当做报错打印出来。