@animaly/motion

motion's animate, motionValue and stagger, running on animaly. Replace the import and keep your code:

import { animate, motionValue, stagger } from "@animaly/motion";

animate(".card", { x: 120, opacity: 1 });
animate(".dot", { scale: [1, 1.4, 1] }, { duration: 0.6, delay: stagger(0.05, { from: "center" }) });
animate([
  [".title", { y: [20, 0], opacity: [0, 1] }],
  [".body", { opacity: [0, 1] }, { at: "-0.1" }],
]);

Supported:

• motion's default transitions, per-value transitions with default and inherit, from, type: false, transitionEnd
• springs by physics or by duration, bounce and visualDuration, using motion's solver
• repeat, repeatType (loop, reverse, mirror), repeatDelay, negative delays
• sequences with at, labels, motion values, callback segments and spring segments
• all of motion's named eases, cubic bezier arrays and easing functions; createMotion({ bezier: "motion" }) uses motion's own bezier solver for exact parity
• controls with motion's time, duration, iterationDuration, state, speed, replay after finishing
• onUpdate per value for elements, objects and single values; motion values with motion's set and jump
• motion's color mixing

Checked against motion v13.4.6: 116 of motion's own tests (animate, sequences, motion values, elements, stagger) run against this package, and 30 transitions are compared with motion's animate frame by frame (equal within 1e-6).

Known differences:

• Inertia with min/max bounces from the exact moment it crosses the boundary. motion detects the boundary while it steps the animation every 50ms to estimate its duration, so its spring starts at the first 50ms step past the boundary and the value overshoots further: at velocity: 1200, max: 150 it peaks at 285.9 where animaly peaks at 231.9.
• A value set with set() while animating is shown until the next frame, like motion, but get() in between returns the animated value.

Not yet: repeating springs, %, vw and em on transforms, attachTimeline. These throw an error that names them.

Pre-release: the API can still change. Parts of motion are ported under its MIT license; see NOTICE.