Stack
New toasts slide in on top, older ones tuck behind. Hover or focus fans the stack out and pauses every timer. Swipe right to dismiss.
Toasts3
Notifications that come and go without stealing focus. They live in polite live regions and pause while you read them.
Undo
The countdown bar shows how long "Undo" stays available. Hover or focus pauses it – people get the time they need (WCAG 2.2.1).
Island
A Dynamic-Island style pill: it stretches open with a springy overshoot, shows the news, then shrinks back.