Handler ↔ Callback to run in response to Event Trigger
Dependency ↔ any Variable local to FC Scope to control Hook Trigger
Event Listener ↔ function to await Event & on Signal Trigger, call Event Handler
Event ↔ Interface Object to rep actions, autogen by DOM Node after Signal Trigger
Deps Array ↔ Deps[] to pass as last arg to Trigger Hook
error.tsx ↔ ( Next 13 ) Page to export default UI on Trigger Error Boundary
loading.tsx ↔ ( Next 13 ) Page to export default loading UI on Trigger Suspense Boundary