Why did my project (written by react) import the cascade cascade cascade selection of ant-design and report a warning, but the page can run normally?

  node.js, question

As mentioned, I opened the project report warning on the website (just copied a demo of cascader, so the code should be fine)
However, cascade selection cannot be displayed normally.

Solve? ! Thank you

In fact, the above information can also see the reason

Yellow information indicates the method of purerender recommended by ant_design, which is used to improve the performance of react. You can ignore it for the time being.

The red information indicates that the props parameter of input cannot be empty. If you want to be empty, you’d better pass in an empty string”. This should be because you have some necessary props that have not been filled in.