Wobble

The element wobbles side to side with slight rotation like a head shaking no.

Add a "Head Shake" attention effect (also called headshake or no shake) to [where].
The element should turn quickly side to side with a slight twist, like a head shaking no, each turn smaller than the last before it settles.
Play it once each time it is triggered, such as on a rejected action, and keep the surrounding layout from moving.

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.

The element scales up, wiggles with rotation, and returns to size in a celebratory flourish.

Add a "Tada" attention effect to [where].
The element should dip slightly smaller, then grow and wiggle side to side with a quick tilt before returning to its normal size, like a small celebration.
Play it once, for example right after a success, and skip it for users who prefer reduced motion.

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 hops up and down with decelerating bounces.

Add a "Bounce" attention effect to [where].
The element should hop up and drop back down in a few quick bounces that get smaller each time, with a slight squash as it lands.
Play it once when triggered rather than looping, and skip it for users who prefer reduced motion.

The element blinks by quickly toggling its opacity.

Add a "Flash" attention effect (also called blink) to [where].
The element should blink by quickly fading out and back in twice, then stay fully visible.
Play it once rather than as an endless blink, and skip it for users who prefer reduced motion, since fast blinking can be uncomfortable.

The element's opacity flickers irregularly like a failing light.

Add a "Flicker" effect (also called flickering) to [where].
The element should stay steady most of the time and dim in short, uneven stutters like a failing neon light.
Keep the timing irregular rather than evenly spaced, avoid rapid full-strength flashing, and stop it for users who prefer reduced motion.