Beacon

A warm red live indicator with a solid, lightly polished dot, three soft expanding rings and a faint pool of light.

isomer.sh/effects/beacon

Knobs

Continue on iPhone
Preset
#EB5549
18.0
38.0
1.00
Colour1
#EB6555
Light1
0.42
Shape1
3.00
Motion2
3.20
0.65
Texture1
0.22
Still frame

What reduced motion shows: 0.82 s.

Install

Code

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

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

export interface BeaconKnobs {
  dotColor: string;
  ringColor: string;
  glow: number;
  dotSize: number;
  reach: number;
  ringCount: number;
  period: number;
  ease: number;
  grain: number;
  state: number;
}

export interface BeaconProps extends Partial<BeaconKnobs> {
  className?: string;
  style?: CSSProperties;
  /** Render this one frame (seconds) and run no clock. Used by the parity tests. */
  time?: number;
  paused?: boolean;
  /** Draw t = 0.82 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 beaconDefaults: Readonly<BeaconKnobs> = DEFAULTS;

export function Beacon({ className, style, time, paused, respectReducedMotion, preserveDrawingBuffer, ...props }: BeaconProps) {
  const knobs = { ...DEFAULTS };
  for (const k of Object.keys(DEFAULTS) as (keyof BeaconKnobs)[]) {
    const v = props[k];
    if (v !== undefined) (knobs as Record<string, unknown>)[k] = v;
  }
  const ref = useIsomerCanvas({ mount, knobs, time, paused, respectReducedMotion, preserveDrawingBuffer, posterTime: 0.82 });
  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.