Heartbeat

The element gently scales or fades in and out repeatedly.

Add a "Pulse" effect (also called pulsing) to [where].
The element should gently swell and ease back in a slow, steady rhythm: subtle, with no bounce.
Loop it seamlessly without shifting the surrounding layout, and stop it for users who prefer reduced motion.

A heart icon fills with color and bursts small particles or pulses when clicked.

Add a "Like / Heart Burst" animation (also called a heart animation or favorite toggle) to [where].
When it is liked, the heart should fill with color and pop with a springy bounce while a ring and small dots burst outward and fade, all quick and playful; unliking just empties the heart quietly.
Keep it a real toggle button with its pressed state, and play the burst only when turning it on.

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 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 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.

A copy of the element scales up and fades out repeatedly like a radar ripple.

Add a "Ping" effect (also called a radar ping or pulse ring) to [where].
A copy of the element should grow outward and fade away, again and again at a steady pace, while the element itself stays still.
Draw the ring as a separate layer so it never changes the layout, and stop the loop for users who prefer reduced motion.