@noahpaige/react-blobs-bg

High-performance, prop-driven animated blob background component with hardware-adaptive quality settings and canvas rendering.

Check out a live example on CodePen: https://codepen.io/noahpaige/pen/EaKodox

Features

• 🎯 Zero-dependency React component: Drop-in React component with no runtime dependencies beyond React itself.
• 🌈 Beautiful gradient blob backgrounds: Renders organic blob shapes with smooth HSL-based gradients, controlled via a simple colorPair prop.
• 🎛️ Prop-driven animation model: The component itself is pure and stable; all motion comes from changing props (blobX, blobY, blobRotations) so animation can be driven by your own state, timelines, or scroll logic.
• 🎯 Per-blob control or one-line config: blobX, blobY, and blobRotations can be a single value (applied to all blobs) or arrays for fine‑grained, per-blob positioning and motion.
• 🚀 Adaptive performance based on hardware: Auto-detects hardware capabilities (GPU, RAM, CPU cores) and picks an appropriate performance tier (low / medium / high) so it feels smooth on low-end laptops and high-refresh displays alike.
• ⚙️ Tunable quality settings: Optional qualitySettings override lets you explicitly control blob count, frame rate, and blur strength when you need precise tradeoffs.
• 🖼️ Efficient offscreen rendering: Uses an offscreen canvas and draws a single blurred frame onto the main canvas, reducing work per frame and improving responsiveness.
• 🧮 Dirty-region rendering optimization: Tracks which parts of the offscreen canvas have actually changed between frames and only clears/redraws those areas, saving GPU/CPU time.
• 🧠 Smart caching (Path2D, gradients, colors): Pools Path2D objects and caches gradients and HSL strings to minimize allocations and expensive canvas operations.
• 📱 Responsive full-screen layout: Automatically resizes to the viewport, covering the entire background (100vw × 100vh) while staying non-interactive (pointerEvents: "none", negative z-index).
• 🛡️ Runtime validation and safety: Validates colorPair, array lengths, and performance-related props, logging clear errors/warnings and falling back to a safe static background if misconfigured.
• 📐 TypeScript-friendly API: Fully typed props (BlobsBgProps, HSLColor, performance types) with sensible defaults (DEFAULT_PROPS) for an easy, discoverable developer experience.
• 🔍 Performance diagnostics in development: Optionally logs performance tier, quality settings, FPS estimates, dirty-region efficiency, and render timings to the console during development.

Installation

npm install @noahpaige/react-blobs-bg

or

yarn add @noahpaige/react-blobs-bg

or

pnpm add @noahpaige/react-blobs-bg

Basic Usage

Static Background

import { BlobsBg, HSLColor } from "@noahpaige/react-blobs-bg";

const colorPair: [HSLColor, HSLColor] = [
  { h: 200, s: 70, l: 50 },
  { h: 300, s: 70, l: 50 },
];

function App() {
  return <BlobsBg colorPair={colorPair} numBlobs={12} />;
}

With External Animation (GSAP)

import { BlobsBg, HSLColor } from "@noahpaige/react-blobs-bg";
import { useEffect, useState } from "react";
import gsap from "gsap";

const colorPair: [HSLColor, HSLColor] = [
  { h: 200, s: 70, l: 50 },
  { h: 300, s: 70, l: 50 },
];

function App() {
  const [rotation, setRotation] = useState(0);
  const [yPosition, setYPosition] = useState(0.5);

  useEffect(() => {
    gsap.to(
      {},
      {
        rotation: 360,
        yPosition: 1,
        duration: 5,
        repeat: -1,
        ease: "none",
        onUpdate: function () {
          setRotation(this.targets()[0].rotation);
          setYPosition(this.targets()[0].yPosition);
        },
      }
    );
  }, []);

  return (
    <BlobsBg colorPair={colorPair} blobRotations={rotation} blobY={yPosition} />
  );
}

With Framer Motion

import { BlobsBg, HSLColor } from "@noahpaige/react-blobs-bg";
import { useMotionValue, useTransform } from "framer-motion";

const colorPair: [HSLColor, HSLColor] = [
  { h: 200, s: 70, l: 50 },
  { h: 300, s: 70, l: 50 },
];

function App() {
  const scrollY = useMotionValue(0);
  const rotation = useTransform(scrollY, [0, 1000], [0, 360]);
  const yPosition = useTransform(scrollY, [0, 1000], [0.5, 1]);

  return (
    <BlobsBg
      colorPair={colorPair}
      blobRotations={rotation.get()}
      blobY={yPosition.get()}
    />
  );
}

Per-Blob Control

import { BlobsBg, HSLColor } from "@noahpaige/react-blobs-bg";

const colorPair: [HSLColor, HSLColor] = [
  { h: 200, s: 70, l: 50 },
  { h: 300, s: 70, l: 50 },
];

function App() {
  return (
    <BlobsBg
      colorPair={colorPair}
      numBlobs={6}
      blobX={[0.2, 0.4, 0.6, 0.8, 0.3, 0.7]}
      blobY={[0.3, 0.5, 0.7, 0.4, 0.6, 0.8]}
      blobRotations={[0, 45, 90, 135, 180, 225]}
    />
  );
}

Performance Override

import { BlobsBg, HSLColor } from "@noahpaige/react-blobs-bg";

const colorPair: [HSLColor, HSLColor] = [
  { h: 200, s: 70, l: 50 },
  { h: 300, s: 70, l: 50 },
];

function App() {
  return (
    <BlobsBg
      colorPair={colorPair}
      performanceTier="high"
      qualitySettings={{
        blobCount: 20,
        frameRate: 60,
        blurAmount: 5,
      }}
    />
  );
}

API Reference

BlobsBg Props

| Prop | Type | Default | Description | | ----------------- | ----------------------------- | ------------ | ------------------------------------------------------------ | | colorPair | [HSLColor, HSLColor] | Required | Array of two HSL colors for blob gradients | | numBlobs | number | 12 | Number of blobs to render | | renderSize | number | 32 | Render size for offscreen canvas | | blobX | number \| number[] | 0.5 | Normalized X position (0-1). Single value or per-blob array | | blobY | number \| number[] | 0.5 | Normalized Y position (0-1). Single value or per-blob array | | blobRotations | number \| number[] | Random | Rotation angles in degrees. Single value or per-blob array | | performanceTier | "low" \| "medium" \| "high" | Auto-detect | Performance tier override | | qualitySettings | object | Auto | Quality settings override (blobCount, frameRate, blurAmount) | | className | string | - | CSS className for the container | | style | React.CSSProperties | - | Inline styles for the container | | onError | (error: Error) => void | - | Error callback |

HSLColor Type

type HSLColor = {
  /** Hue value (0-360 degrees) */
  h: number;
  /** Saturation percentage (0-100) */
  s: number;
  /** Lightness percentage (0-100) */
  l: number;
};

Exported Utilities

// Detect performance tier
import { detectPerformanceTier } from "@noahpaige/react-blobs-bg";

const tier = await detectPerformanceTier(); // "low" | "medium" | "high"

Performance

The component automatically detects device capabilities and adjusts:

• Blob count: 6 (low) / 9 (medium) / 12+ (high)
• Frame rate: 20fps (low) / 30fps (medium) / 60fps (high)
• Blur amount: 2px (low) / 3px (medium) / 4px (high)

Performance Optimizations

• Dirty region tracking - Only redraws changed areas
• Path2D pooling - Reuses Path2D objects for memory efficiency
• Gradient caching - Caches gradients to avoid regeneration
• Color string caching - Caches HSL string conversions
• Frame rate limiting - Maintains consistent performance
• Offscreen rendering - Renders to offscreen canvas first

Browser Compatibility

• Chrome/Edge (Chromium) ✅
• Firefox ✅
• Safari ✅
• Mobile browsers (iOS Safari, Chrome Mobile) ✅

TypeScript

Full TypeScript support is included. All types are exported from the main package:

import {
  BlobsBg,
  BlobsBgProps,
  HSLColor,
  PerformanceTier,
  detectPerformanceTier,
} from "@noahpaige/react-blobs-bg";

License

MIT

Contributing

Contributions are welcome! Please feel free to submit a Pull Request.

Author

Noah Paige

Repository

https://github.com/noahpaige/react-blobs-bg