Параметры react-router-dom v6 только числа

Регулярные выражения не поддерживаются в react-router-dom@6.

См. Что случилось с путями маршрутов регулярных выражений?

Regexp route paths were removed for two reasons:

1. Regular expression paths in routes raised a lot of questions for v6's ranked route matching. How do you rank a regex?

2. We were able to shed an entire dependency (path-to-regexp) and cut the package weight sent to your user's browser significantly. If it were added back, it would represent 1/3 of React Router's page weight!

Вы можете использовать хук useParams и протестировать параметр id в компоненте.

Пример:

import { useParams, useNavigate } from 'react-router-dom';

const MyComponent = () => {
  const { id } = useParams();
  const navigate = useNavigate();

  useEffect(() => {
    if (!/\d+/.test(id)) {
      navigate(-1);
    }
  }, [id, navigate]);

  ...
};