Easing Functions for SVG Animation

What Easing Functions Actually Control

An easing function defines the rate of change of an animated property over its duration, meaning a linear ease moves at a constant speed throughout, while an ease-out function starts fast and decelerates toward the end, producing dramatically different perceived motion quality even with identical start and end values.

• An easing function defines the rate of change of a property over its duration
• Linear easing moves at a constant speed for the entire animation
• Ease-out starts fast and decelerates, producing very different perceived motion

Choosing an Easing Function for Natural Motion

Real-world physical motion rarely moves at a perfectly constant speed, so ease-in-out or spring-based easing functions generally feel more natural for SVG animations mimicking physical movement, while linear easing suits mechanical or continuous effects like a spinning loading indicator instead.

• Real-world motion rarely moves at a perfectly constant, linear speed
• Ease-in-out or spring-based easing generally feels more natural for physical motion
• Linear easing suits mechanical or continuous effects like a spinning loader

Frequently Asked Questions

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