How to get optional parameters in a route?

Question

React

NEXTjs.
How to implement getting all route parameters, for example, in such a request

https://www.site.ru/zhenskaja/odezhda/plat-ja?base_color=1461&p=1

The route is dynamic, how to get all the parameters?
I understood that it is necessary to transfer from the server via req, but the problem is with optional parameters, there can be as many as you like

server.get('/products/:category', (req, res) => app.render(req, res, '/catalog', {
      category: req.params.category,
    }));

Answer 1

req.query