Bearing

A toggle whose thumb is a polished steel ball rolling in a milled groove.

isomer.sh/effects/bearing

Knobs

Continue on iPhone
Preset
#FF7A3D
#1A1A1D
60
1.25
Colour1
0.00
Light3
0.85
0.62
0.72
Motion1
0.50
Still frame

What reduced motion shows: 2 s.

Install

Code

components/isomer/bearing.tsx
'use client';
// Generated by isomer. Do not edit by hand; run `isomer add` again to update. (from packages/react/src/Bearing.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 './bearing.js';

const { DEFAULTS, mount } = runtime as { DEFAULTS: BearingKnobs; mount: Mount };

export interface BearingKnobs {
  on: number;
  accent: string;
  trackColour: string;
  width: number;
  weight: number;
  dampingRatio: number;
  polish: number;
  ballTint: number;
  trackGlow: number;
  wallShadow: number;
}

export interface BearingProps extends Partial<BearingKnobs> {
  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 = 3 and holds that frame. Draw t = 3 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 bearingDefaults: Readonly<BearingKnobs> = DEFAULTS;

export function Bearing({ className, style, time, paused, respectReducedMotion, preserveDrawingBuffer, ...props }: BearingProps) {
  const knobs = { ...DEFAULTS };
  for (const k of Object.keys(DEFAULTS) as (keyof BearingKnobs)[]) {
    const v = props[k];
    if (v !== undefined) (knobs as Record<string, unknown>)[k] = v;
  }
  const ref = useIsomerCanvas({ mount, knobs, time, paused, respectReducedMotion, preserveDrawingBuffer, posterTime: 3.0, settleAt: 3.0 });
  return <canvas ref={ref} className={className} style={{ display: 'block', width: '100%', height: '100%', ...style }} />;
}

Parity

iPhone 17 Pro simulator, iOS 26.3.1 against Chromium headless + SwiftShader, 15 October 2026.