How do I get path parameters in LiveView?

[morgz]

Useful clarification recently added by Jose when deciding whether to use mount or handle_params

Note the parameters given to c:handle_params/3 are the same as the ones given
to c:mount/3. So how do you decide which callback to use to load data?
Generally speaking, data should always be loaded on c:mount/3, since c:mount/3
is invoked once per LiveView life-cycle. Only the params you expect to be changed
via live_patch/2 or push_patch/2 must be loaded on c:handle_params/3.

https://github.com/phoenixframework/phoenix_live_view/commit/34424f37c3be388414d180536f30b208d06602bd