Rubber Band

The element skews back and forth with decaying amplitude like a wobbling jelly.

Add a "Jello" attention effect (also called jelly) to [where].
The element should skew back and forth like a wobbling jelly, strong at first and quickly settling to rest.
Play it once when triggered, and keep the element's footprint so nearby content does not shift.

The element scales with an elastic overshoot when hover starts or ends.

Add a "Bounce Scale" hover effect (also called bounce in / out) to [where].
The element should grow slightly larger with a springy, visible overshoot, briefly going past its final size before settling, and bounce back the same way when the pointer leaves.
Keep the surrounding layout from shifting, and show the same effect on keyboard focus.

The element jitters quickly back and forth along one axis.

Add a "Shake" effect (also called an error shake or invalid input shake) to [where].
The element should jitter quickly left and right a few times and stop exactly where it started: fast and firm.
Play it once each time the error happens rather than looping, and pair it with a visible error message so the meaning does not rely on motion alone.

The element quickly scales up and settles back with a springy pop.

Add a "Pop" hover effect to [where].
Each time the pointer enters, the element should swell up once quickly and settle back to its normal size, like a small springy pop.
Play it once per hover rather than holding the larger size or looping, and keep the surrounding layout from shifting.

The element rotates continuously at constant speed.

Add a "Spin" effect (also called a spinner or rotate loop) to [where].
The element should rotate continuously at a constant, even speed, with no easing between turns.
Make the loop seamless, give the spinner an accessible loading label, and slow or stop it for users who prefer reduced motion.

The element swings back and forth from its top edge like a pendulum with decaying amplitude.

Add a "Swing" attention effect to [where].
The element should swing back and forth like a hanging sign, starting with a wide swing that quickly dies down.
Pivot it from its top edge rather than its center, and play it once when triggered.