HB

Ease-In

Ease-Out

Ease-In-Out


Lab 001 · Motion systems

Easing

brand expression with interaction latency budgets while staying accessible to every user.

Why easing matters for technical products

Precision easing removes jitter from complex UI systems: dashboards, analysis tooling, and immersive editors. The right curve frames state changes as intentional rather than sluggish.

  • Compress time-to-meaning by front-loading signal and delaying friction.

  • Keep motion deterministic across 120 hz and degraded 30 hz displays.

  • Communicate system confidence when streaming or lazily loading data.

Easing families at a glance

Ease-in

Sharp acceleration, ideal for telemetry cards or progressive disclose drawers.

Pair with: icon staggers, density shifts

Ease-out

Graceful deceleration, best for destructive confirmations and modal exits.

Pair with: opacity ramps, blur release

Ease-in-out

Symmetric control, perfect for navigation rails and progressive onboarding.

Pair with: z-elevation, background tint

Elastic & bounce

Use sparingly to draw attention to interactive probes or live system states.

Pair with: haptic ping, transient color

Interact with the curve

The demo visualises an ease-in-out cubic curve pushing a payload across the track. Inspect velocity changes and ensure the midpoint reads as a decisive inflection, not a pause.

  1. Replay to validate momentum on high DPI screens.
  2. Pair with telemetry overlays to monitor dropping frames.
  3. Lock animation if prefers-reduced-motion is detected.

Implementation starter

Compose a reusable easing token so engineering and design iterate on one source. Match animation duration with component complexity and data fetch strategy.

Tip. Keep easing constants in analytics dashboards so you can correlate curve shifts with drop-off or conversion changes.