Describe the problem that you experienced

Today I started to work with queries respectively query parameters in Angular.
And I found that there seems not really any hands-on documentation (or even a tutorial) that describes the use of optional parameters in routes.

I was completely reliant on third party tutorials, have been searching for original explanations on angular.io but didn't find much.

My challenge was similar to this one (stackoverflow).
And the only answer also only refers to a third party tutorial by DigitalOcean (which from my point of view indicates that this is certainly a relevant topic, which is worth being covered in the original docs).

In fact this seems to be a common routing task.
Therefore it would be great to get at least some explanation about it Angular's Common Routing Tasks Docs.

And from my point of view it would also be great to teach this hands-on in one of the tutorials (which isn't the case yet, as far as I know).