Paweł Pluta

[pickers] onAccept fired even when date is invalid, without information about error

2

### Steps to reproduce Link to live example: [https://stackblitz.com/edit/react-mnt73n?file=Demo.tsx](https://stackblitz.com/edit/react-mnt73n?file=Demo.tsx) Steps: 1. insert into input date which doesn't pass validation 2. click calendar icon to open popup/dialog 3. click outside of...