Logging and telemetry
The framework reports what happens inside itself - services activating, failing, focus and pause changes, teardown - through a single function you give it. It does not queue, batch, format or send anything. Where records go is your decision.
Migrating from Unity
This is the one page in the web documentation that talks about Unity. It maps each Unity concept to its web counterpart, lists what carries over unchanged, and calls out the places where the web framework behaves differently.
Design and decisions
Summary