The plain-English version
Whether the game page or interaction surface currently receives the relevant input and attention.
Why it matters
Focus changes must have explicit effects on controls, audio, and pause behavior to avoid surprising actions.
Let’s make it click
When a player switches tabs, the game clears held-key state and shows a paused overlay when they return.
Vibe Bro’s heads-up
If a key-up event is missed during focus loss, relying only on that event can leave movement stuck on.
The docs behind it
Documentation links checked .
Editorial review · October 28, 2026
Supported: Visibility/focus changes can require explicit input recovery. The paused-overlay flow and clearing held keys are application policy examples.