Glow.
A soft halo briefly emphasizes an active surface.
See the movement
One intentional triggerPlayback starts only when you request it. Stop returns to the still illustration.
What it does
A shadow or halo grows and fades around an element without changing its size. The effect is useful for a short highlight, but it should not replace a clear selected or focused state.
Timing curve
ease-in-outDefault duration1100ms
RepetitionOnce per trigger
Make the motion useful
Choose an effect that supports the component’s purpose. Keep the final state clear, preserve focus and reading order, and pair important feedback with a visible message.
CSS animation reference