Euler Coin
A brushed metal coin drops onto the screen, lands on its rim and settles the way a real coin does, wobbling faster and faster as it tips flat, then lies still with a soft click.
Knobs
Preset
#E3B467
Light3
Shape3
Motion1
Texture1
Still frame
What reduced motion shows: 2 s.
Install
Code
components/isomer/eulercoin.tsx
'use client'; // Generated by isomer. Do not edit by hand; run `isomer add` again to update. (from packages/react/src/Eulercoin.tsx) // generated by packages/react/scripts/gen-components.mjs, do not edit import type { CSSProperties } from 'react'; import { useIsomerCanvas, type Mount } from './useIsomerCanvas'; // @ts-ignore: the runtime is plain JS with no type declarations import * as runtime from './eulercoin.js'; const { DEFAULTS, mount } = runtime as { DEFAULTS: EulercoinKnobs; mount: Mount }; export interface EulercoinKnobs { metalColor: string; diameter: number; settle: number; wobble: number; gloss: number; mark: number; keyAngle: number; fillLight: number; thickness: number; fieldRadius: number; dropHeight: number; frost: number; } export interface EulercoinProps extends Partial<EulercoinKnobs> { className?: string; style?: CSSProperties; /** Render this one frame (seconds) and run no clock. Used by the parity tests. */ time?: number; paused?: boolean; /** The clock stops at t = 5.7 and holds that frame. Draw t = 5.7 once when the user prefers reduced motion. Default true. */ respectReducedMotion?: boolean; /** Keep each frame readable after it is shown, for canvas.toDataURL or readPixels. Read at mount. Default false. */ preserveDrawingBuffer?: boolean; } export const eulercoinDefaults: Readonly<EulercoinKnobs> = DEFAULTS; export function Eulercoin({ className, style, time, paused, respectReducedMotion, preserveDrawingBuffer, ...props }: EulercoinProps) { const knobs = { ...DEFAULTS }; for (const k of Object.keys(DEFAULTS) as (keyof EulercoinKnobs)[]) { const v = props[k]; if (v !== undefined) (knobs as Record<string, unknown>)[k] = v; } const ref = useIsomerCanvas({ mount, knobs, time, paused, respectReducedMotion, preserveDrawingBuffer, posterTime: 5.7, settleAt: 5.7 }); return <canvas ref={ref} className={className} style={{ display: 'block', width: '100%', height: '100%', ...style }} />; }
Parity
100.0Frame-identical
iPhone 17 Pro simulator, iOS 26.3.1 against Chromium headless + SwiftShader, 15 October 2026.