Advanced recipes

Use these patterns for lists, dashboards, auctions, reservation holds, jobs, and task boards.

Core for display-only lists

• Many display countdowns: one shared useTimer() drives many derived countdown labels.

Timer group

• Timer group: many keyed lifecycles with independent state.
• Group controls: pause, resume, restart, and cancel many items together.
• Checkout holds: cart, seat, coupon, and reservation windows on one scheduler.
• Dynamic items: add, update, and remove timers at runtime.
• Toast auto-dismiss: runtime toast timers with pause-on-hover and manual dismiss.

Timer group + schedules

• Per-item polling: each row owns its own schedule cadence.