P5-wrapper/react

README

@P5-wrapper/react

A component to integrate P5.js sketches into React apps.

Migrating from version 4?

Breaking changes in v5:

Component rename
- ReactP5Wrapper → P5Canvas
Types
- P5WrapperProps → P5CanvasProps
- P5WrapperClassName → CanvasContainerClassName
Peer dependencies
- p5 >= 2.0.0
- react >= 19.0.0
- react-dom >= 19.0.0

If you are still using version 4, you can find the documentation here.

Installation

[npm|yarn|pnpm] [install|add] p5 @p5-wrapper/react

p5, react and react-dom are peer dependencies and must be installed in your project.

TypeScript setup

p5 ships its own type definitions, so no extra @types package is needed — TypeScript picks the types up from the p5 package automatically.

Next.js setup

For Next.js applications, use our Next.js dynamic implementation:

[npm|yarn|pnpm] [install|add] p5 @p5-wrapper/next @p5-wrapper/react

See the Next.js dynamic implementation docs for further details.

Demo & Examples

A live demo can be viewed at P5-wrapper.github.io/react. The repository also contains example sketches.

To run the examples locally:

git clone git@github.com:<your username>/react.git
cd react
pnpm install
pnpm dev

Then open http://localhost:5173 in a browser.

Usage

JavaScript

import * as React from "react";
import { P5Canvas } from "@p5-wrapper/react";

function sketch(p5) {
  p5.setup = () => p5.createCanvas(600, 400, p5.WEBGL);

  p5.draw = () => {
    p5.background(250);
    p5.normalMaterial();
    p5.push();
    p5.rotateZ(p5.frameCount * 0.01);
    p5.rotateX(p5.frameCount * 0.01);
    p5.rotateY(p5.frameCount * 0.01);
    p5.plane(100);
    p5.pop();
  };
}

export function App() {
  return <P5Canvas sketch={sketch} />;
}

TypeScript

The sketch prop is a function that receives a p5 instance. You can type it using either the Sketch type or the P5CanvasInstance type:

import * as React from "react";
import { P5Canvas, Sketch } from "@p5-wrapper/react";

const sketch: Sketch = p5 => {
  p5.setup = () => p5.createCanvas(600, 400, p5.WEBGL);

  p5.draw = () => {
    p5.background(250);
    p5.normalMaterial();
    p5.push();
    p5.rotateZ(p5.frameCount * 0.01);
    p5.rotateX(p5.frameCount * 0.01);
    p5.rotateY(p5.frameCount * 0.01);
    p5.plane(100);
    p5.pop();
  };
};

export function App() {
  return <P5Canvas sketch={sketch} />;
}

Sketch auto-types the p5 argument for you. If you prefer a regular function declaration, you can use P5CanvasInstance directly:
import { P5CanvasInstance } from "@p5-wrapper/react";

function sketch(p5: P5CanvasInstance) {
  /* ... */
}

Using abstracted setup and draw functions

If you prefer to split your sketch logic into separate functions:

import * as React from "react";
import { P5Canvas } from "@p5-wrapper/react";

function setup(p5) {
  return () => {
    p5.createCanvas(600, 400, p5.WEBGL);
  };
}

function draw(p5) {
  return () => {
    p5.background(250);
    p5.normalMaterial();
    p5.push();
    p5.rotateZ(p5.frameCount * 0.01);
    p5.rotateX(p5.frameCount * 0.01);
    p5.rotateY(p5.frameCount * 0.01);
    p5.plane(100);
    p5.pop();
  };
}

function sketch(p5) {
  p5.setup = setup(p5);
  p5.draw = draw(p5);
}

export function App() {
  return <P5Canvas sketch={sketch} />;
}

Props

You can pass any custom props to P5Canvas. These are forwarded to the updateWithProps method if you define it in your sketch.

Reacting to props

updateWithProps is called on initial render and whenever the props change:

import { P5Canvas } from "@p5-wrapper/react";
import React, { useEffect, useState } from "react";

function sketch(p5) {
  let rotation = 0;

  p5.setup = () => p5.createCanvas(600, 400, p5.WEBGL);

  p5.updateWithProps = props => {
    rotation = (props.rotation * Math.PI) / 180;
  };

  p5.draw = () => {
    p5.background(100);
    p5.normalMaterial();
    p5.noStroke();
    p5.push();
    p5.rotateY(rotation);
    p5.box(100);
    p5.pop();
  };
}

export function App() {
  const [rotation, setRotation] = useState(0);

  useEffect(() => {
    const interval = setInterval(
      () => setRotation(rotation => rotation + 100),
      100
    );

    return () => {
      clearInterval(interval);
    };
  }, []);

  return <P5Canvas sketch={sketch} rotation={rotation} />;
}

Typed props with generics

Use generics so that props passed to updateWithProps are properly typed:

import { P5Canvas, Sketch, SketchProps } from "@p5-wrapper/react";
import React, { useEffect, useState } from "react";

type MySketchProps = SketchProps & {
  rotation: number;
};

const sketch: Sketch<MySketchProps> = p5 => {
  let rotation = 0;

  p5.setup = () => p5.createCanvas(600, 400, p5.WEBGL);

  p5.updateWithProps = props => {
    rotation = (props.rotation * Math.PI) / 180;
  };

  p5.draw = () => {
    p5.background(100);
    p5.normalMaterial();
    p5.noStroke();
    p5.push();
    p5.rotateY(rotation);
    p5.box(100);
    p5.pop();
  };
};

export function App() {
  const [rotation, setRotation] = useState(0);

  useEffect(() => {
    const interval = setInterval(
      () => setRotation(rotation => rotation + 100),
      100
    );

    return () => {
      clearInterval(interval);
    };
  }, []);

  return <P5Canvas sketch={sketch} rotation={rotation} />;
}

You can also write MySketchProps as an interface:
interface MySketchProps extends SketchProps {
  rotation: number;
}
And if you prefer P5CanvasInstance over Sketch, generics work the same way:
function sketch(p5: P5CanvasInstance<MySketchProps>) {
  /* ... */
}

Custom updaters

If you need to bridge React state updates from within the p5 lifecycle — for example, reading frameCount or other instance properties to drive React state — you can use the updater prop. It receives a callback that runs alongside updateWithProps on every props change, but lives in the React layer:

import { P5Canvas, Sketch, SketchProps, Updater } from "@p5-wrapper/react";
import React, { useCallback, useState } from "react";

type MySketchProps = SketchProps & { rotation: number };

const sketch: Sketch<MySketchProps> = p5 => {
  let rotation = 0;

  p5.setup = () => p5.createCanvas(600, 400, p5.WEBGL);

  p5.updateWithProps = props => {
    rotation = (props.rotation * Math.PI) / 180;
  };

  p5.draw = () => {
    p5.background(100);
    p5.normalMaterial();
    p5.noStroke();
    p5.push();
    p5.rotateY(rotation);
    p5.box(100);
    p5.pop();
  };
};

export function App() {
  const [rotation, setRotation] = useState(0);
  const [frameCount, setFrameCount] = useState(0);

  const updater = useCallback<Updater<MySketchProps>>((instance, props) => {
    setFrameCount(instance.frameCount);
  }, []);

  return <P5Canvas sketch={sketch} updater={updater} rotation={rotation} />;
}

The updater callback receives the p5 instance and the current sketch props. It is not passed to updateWithProps, so it does not leak React concerns into your sketch logic.

Children

To render a component on top of the sketch, add it as a child of P5Canvas and use the exported CanvasContainerClassName constant to style the overlay via CSS.

Example with styled-components

import { CanvasContainerClassName, P5Canvas } from "@p5-wrapper/react";
import styled, { createGlobalStyle } from "styled-components";

const GlobalWrapperStyles = createGlobalStyle`
  .${CanvasContainerClassName} {
    position: relative;
  }
`;

const StyledCentredText = styled.span`
  .${CanvasContainerClassName} & {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: white;
    font-size: 2rem;
    margin: 0;
    text-align: center;
  }
`;

export function App() {
  const [rotation, setRotation] = useState(0);

  useEffect(() => {
    const interval = setInterval(
      () => setRotation(rotation => rotation + 100),
      100
    );

    return () => {
      clearInterval(interval);
    };
  }, []);

  return (
    <Fragment>
      <GlobalWrapperStyles />
      <P5Canvas sketch={sketch} rotation={rotation}>
        <StyledCentredText>Hello world!</StyledCentredText>
      </P5Canvas>
    </Fragment>
  );
}

You can use any CSS-in-JS library or plain CSS — just target the wrapper class as your root selector.

Fallback UIs

If the sketch prop is undefined, you can provide a fallback UI:

import * as React from "react";
import { P5Canvas } from "@p5-wrapper/react";

function sketchOne(p5) {
  p5.setup = () => p5.createCanvas(600, 400, p5.WEBGL);
  p5.draw = () => {
    p5.background(250);
    p5.normalMaterial();
    p5.push();
    p5.rotateZ(p5.frameCount * 0.01);
    p5.rotateX(p5.frameCount * 0.01);
    p5.rotateY(p5.frameCount * 0.01);
    p5.plane(100);
    p5.pop();
  };
}

function sketchTwo(p5) {
  p5.setup = () => p5.createCanvas(600, 400, p5.WEBGL);
  p5.draw = () => {
    p5.background(500);
    p5.normalMaterial();
    p5.push();
    p5.rotateZ(p5.frameCount * 0.01);
    p5.rotateX(p5.frameCount * 0.01);
    p5.rotateY(p5.frameCount * 0.01);
    p5.plane(100);
    p5.pop();
  };
}

export function App() {
  const [sketch, setSketch] = React.useState(undefined);
  const chooseNothing = () => setSketch(undefined);
  const chooseSketchOne = () => setSketch(sketchOne);
  const chooseSketchTwo = () => setSketch(sketchTwo);

  return (
    <>
      <ul>
        <li>
          <button onClick={chooseNothing}>Choose nothing</button>
        </li>
        <li>
          <button onClick={chooseSketchOne}>Choose sketch 1</button>
        </li>
        <li>
          <button onClick={chooseSketchTwo}>Choose sketch 2</button>
        </li>
      </ul>
      <P5Canvas fallback={<h1>No sketch selected yet.</h1>} sketch={sketch} />
    </>
  );
}

When no sketch is selected, the fallback UI is shown. Selecting a sketch replaces it with the canvas.

Error and Loading UIs

You can pass error and loading props to customise what is shown when something goes wrong or while the component is loading.

Error UIs

Pass a function to the error prop to handle errors thrown within the sketch or its children:

import * as React from "react";
import { P5Canvas, P5CanvasInstance } from "@p5-wrapper/react";

function ErrorChild() {
  throw new Error("oops");
}

function ErrorUI(error: unknown) {
  if (error instanceof Error) {
    return <p>An error occurred: {error.message}</p>;
  }

  return <p>An unknown error occurred: {String(error)}</p>;
}

function sketch(p5: P5CanvasInstance) {
  p5.setup = () => p5.createCanvas(600, 400, p5.WEBGL);
  p5.draw = () => {
    p5.background(250);
    p5.normalMaterial();
    p5.push();
    p5.rotateZ(p5.frameCount * 0.01);
    p5.rotateX(p5.frameCount * 0.01);
    p5.rotateY(p5.frameCount * 0.01);
    p5.plane(100);
    p5.pop();
  };
}

export function App() {
  return (
    <P5Canvas sketch={sketch} error={ErrorUI}>
      <ErrorChild />
    </P5Canvas>
  );
}

JS/TS allow you to throw any value, not just Error instances. Always check error instanceof Error before accessing .message.

Loading UIs

Pass a function to the loading prop to show a custom UI while the component is being lazy loaded:

import * as React from "react";
import { P5Canvas, P5CanvasInstance } from "@p5-wrapper/react";

function LoadingUI() {
  return <p>The sketch is being loaded.</p>;
}

function sketch(p5: P5CanvasInstance) {
  p5.setup = () => p5.createCanvas(600, 400, p5.WEBGL);
  p5.draw = () => {
    p5.background(250);
    p5.normalMaterial();
    p5.push();
    p5.rotateZ(p5.frameCount * 0.01);
    p5.rotateX(p5.frameCount * 0.01);
    p5.rotateY(p5.frameCount * 0.01);
    p5.plane(100);
    p5.pop();
  };
}

export function App() {
  return <P5Canvas sketch={sketch} loading={LoadingUI} />;
}

P5 plugins and constructors

Using plugins (e.g. p5.sound)

Since P5 is used in instance mode, plugins are not loaded automatically. You need to set p5 on the window object before importing the plugin:

import * as p5 from "p5";
import { P5Canvas, Sketch } from "@p5-wrapper/react";
import React, { useEffect, useState } from "react";

(window as any).p5 = p5;

await import("p5/lib/addons/p5.sound");

const sketch: Sketch = p5 => {
  let song: p5.SoundFile;
  let button: p5.Element;

  p5.setup = () => {
    p5.createCanvas(600, 400, p5.WEBGL);
    p5.background(255, 0, 0);
    button = p5.createButton("Toggle audio");

    button.mousePressed(() => {
      if (!song) {
        const songPath = "/piano.mp3";
        song = p5.loadSound(
          songPath,
          () => {
            song.play();
          },
          () => {
            console.error(
              `Could not load the requested sound file ${songPath}`
            );
          }
        );
        return;
      }

      if (!song.isPlaying()) {
        song.play();
        return;
      }

      song.pause();
    });
  };

  p5.draw = () => {
    p5.background(250);
    p5.normalMaterial();
    p5.push();
    p5.rotateZ(p5.frameCount * 0.01);
    p5.rotateX(p5.frameCount * 0.01);
    p5.rotateY(p5.frameCount * 0.01);
    p5.plane(100);
    p5.pop();
  };
};

export default function App() {
  return <P5Canvas sketch={sketch} />;
}

Key points:

p5 must be set on window before importing the plugin.
Audio must be triggered by a user action (e.g. a button click) — browsers block autoplay.
Safari blocks audio from all tabs by default; users may need to change this in their browser settings.

Note: This example requires top level await, dynamic imports and the stream API (HTTPS only).

Using constructors (e.g. p5.Vector)

In instance mode, constructors are accessed via p5.constructor instead of the global p5 namespace:

Constructor	Global mode	Instance mode
Vector	p5.Vector	p5.constructor.Vector
Envelope	p5.Envelope	p5.constructor.Envelope

For example, to get a random 2D vector, call p5.constructor.Vector.random2D() instead of p5.Vector.random2D().

Development

The source code for the component is in the src directory and the demo application is in the demo directory. You will need Node.js and pnpm — the exact versions are pinned in package.json.

To build, watch and serve the examples (which also watches the component source):

pnpm dev

Contributing

Before opening a pull request, make sure your changes pass every quality gate:

pnpm integrate

This runs the same checks as CI — formatting, linting, tests, and builds. Pull requests are reviewed against the pull request template and must keep the public API in src/main.tsx backwards compatible. Commits follow the conventional commit style (feat:, fix:, chore:, etc.) — emoji prefixes are only used by automated pull requests.

The typescript dependency is pinned to 6.0.3 on purpose: typescript-eslint does not support TypeScript 7 yet — the Go-based v7 is not feature compatible with the v6 API it builds on, and upstream support cannot land before TypeScript 7.1.x. It is tracked in typescript-eslint#10940. Please do not widen the pin in pull requests — we wait for full feature parity before migrating to v7, no half measures.

AI-assisted contributions

Contributions developed with the assistance of an AI agent are welcome, but you — the developer — are always the ultimately responsible individual for your contributions. AI agents cannot author or certify them. When AI assistance is used:

Commit with --signoff (git commit -s) so that you certify the Developer Certificate of Origin for the work yourself
Optionally credit the agent with an Assisted-by: LLM trailer in the commit message, as recommended by the Linux kernel team
Ensure all work adheres to the MIT licence

See AGENTS.md for the full set of rules agents follow in this repository.

README

@P5-wrapper/react

A component to integrate P5.js sketches into React apps.

Migrating from version 4?

Breaking changes in v5:

Component rename
- ReactP5Wrapper → P5Canvas
Types
- P5WrapperProps → P5CanvasProps
- P5WrapperClassName → CanvasContainerClassName
Peer dependencies
- p5 >= 2.0.0
- react >= 19.0.0
- react-dom >= 19.0.0

If you are still using version 4, you can find the documentation here.

Installation

[npm|yarn|pnpm] [install|add] p5 @p5-wrapper/react

p5, react and react-dom are peer dependencies and must be installed in your project.

TypeScript setup

p5 ships its own type definitions, so no extra @types package is needed — TypeScript picks the types up from the p5 package automatically.

Next.js setup

For Next.js applications, use our Next.js dynamic implementation:

[npm|yarn|pnpm] [install|add] p5 @p5-wrapper/next @p5-wrapper/react

See the Next.js dynamic implementation docs for further details.

Demo & Examples

A live demo can be viewed at P5-wrapper.github.io/react. The repository also contains example sketches.

To run the examples locally:

git clone git@github.com:<your username>/react.git
cd react
pnpm install
pnpm dev

Then open http://localhost:5173 in a browser.

Usage

JavaScript

import * as React from "react";
import { P5Canvas } from "@p5-wrapper/react";

function sketch(p5) {
  p5.setup = () => p5.createCanvas(600, 400, p5.WEBGL);

  p5.draw = () => {
    p5.background(250);
    p5.normalMaterial();
    p5.push();
    p5.rotateZ(p5.frameCount * 0.01);
    p5.rotateX(p5.frameCount * 0.01);
    p5.rotateY(p5.frameCount * 0.01);
    p5.plane(100);
    p5.pop();
  };
}

export function App() {
  return <P5Canvas sketch={sketch} />;
}

TypeScript

The sketch prop is a function that receives a p5 instance. You can type it using either the Sketch type or the P5CanvasInstance type:

import * as React from "react";
import { P5Canvas, Sketch } from "@p5-wrapper/react";

const sketch: Sketch = p5 => {
  p5.setup = () => p5.createCanvas(600, 400, p5.WEBGL);

  p5.draw = () => {
    p5.background(250);
    p5.normalMaterial();
    p5.push();
    p5.rotateZ(p5.frameCount * 0.01);
    p5.rotateX(p5.frameCount * 0.01);
    p5.rotateY(p5.frameCount * 0.01);
    p5.plane(100);
    p5.pop();
  };
};

export function App() {
  return <P5Canvas sketch={sketch} />;
}

Sketch auto-types the p5 argument for you. If you prefer a regular function declaration, you can use P5CanvasInstance directly:
import { P5CanvasInstance } from "@p5-wrapper/react";

function sketch(p5: P5CanvasInstance) {
  /* ... */
}

Using abstracted setup and draw functions

If you prefer to split your sketch logic into separate functions:

import * as React from "react";
import { P5Canvas } from "@p5-wrapper/react";

function setup(p5) {
  return () => {
    p5.createCanvas(600, 400, p5.WEBGL);
  };
}

function draw(p5) {
  return () => {
    p5.background(250);
    p5.normalMaterial();
    p5.push();
    p5.rotateZ(p5.frameCount * 0.01);
    p5.rotateX(p5.frameCount * 0.01);
    p5.rotateY(p5.frameCount * 0.01);
    p5.plane(100);
    p5.pop();
  };
}

function sketch(p5) {
  p5.setup = setup(p5);
  p5.draw = draw(p5);
}

export function App() {
  return <P5Canvas sketch={sketch} />;
}

Props

You can pass any custom props to P5Canvas. These are forwarded to the updateWithProps method if you define it in your sketch.

Reacting to props

updateWithProps is called on initial render and whenever the props change:

import { P5Canvas } from "@p5-wrapper/react";
import React, { useEffect, useState } from "react";

function sketch(p5) {
  let rotation = 0;

  p5.setup = () => p5.createCanvas(600, 400, p5.WEBGL);

  p5.updateWithProps = props => {
    rotation = (props.rotation * Math.PI) / 180;
  };

  p5.draw = () => {
    p5.background(100);
    p5.normalMaterial();
    p5.noStroke();
    p5.push();
    p5.rotateY(rotation);
    p5.box(100);
    p5.pop();
  };
}

export function App() {
  const [rotation, setRotation] = useState(0);

  useEffect(() => {
    const interval = setInterval(
      () => setRotation(rotation => rotation + 100),
      100
    );

    return () => {
      clearInterval(interval);
    };
  }, []);

  return <P5Canvas sketch={sketch} rotation={rotation} />;
}

Typed props with generics

Use generics so that props passed to updateWithProps are properly typed:

import { P5Canvas, Sketch, SketchProps } from "@p5-wrapper/react";
import React, { useEffect, useState } from "react";

type MySketchProps = SketchProps & {
  rotation: number;
};

const sketch: Sketch<MySketchProps> = p5 => {
  let rotation = 0;

  p5.setup = () => p5.createCanvas(600, 400, p5.WEBGL);

  p5.updateWithProps = props => {
    rotation = (props.rotation * Math.PI) / 180;
  };

  p5.draw = () => {
    p5.background(100);
    p5.normalMaterial();
    p5.noStroke();
    p5.push();
    p5.rotateY(rotation);
    p5.box(100);
    p5.pop();
  };
};

export function App() {
  const [rotation, setRotation] = useState(0);

  useEffect(() => {
    const interval = setInterval(
      () => setRotation(rotation => rotation + 100),
      100
    );

    return () => {
      clearInterval(interval);
    };
  }, []);

  return <P5Canvas sketch={sketch} rotation={rotation} />;
}

You can also write MySketchProps as an interface:
interface MySketchProps extends SketchProps {
  rotation: number;
}
And if you prefer P5CanvasInstance over Sketch, generics work the same way:
function sketch(p5: P5CanvasInstance<MySketchProps>) {
  /* ... */
}

Custom updaters

import { P5Canvas, Sketch, SketchProps, Updater } from "@p5-wrapper/react";
import React, { useCallback, useState } from "react";

type MySketchProps = SketchProps & { rotation: number };

const sketch: Sketch<MySketchProps> = p5 => {
  let rotation = 0;

  p5.setup = () => p5.createCanvas(600, 400, p5.WEBGL);

  p5.updateWithProps = props => {
    rotation = (props.rotation * Math.PI) / 180;
  };

  p5.draw = () => {
    p5.background(100);
    p5.normalMaterial();
    p5.noStroke();
    p5.push();
    p5.rotateY(rotation);
    p5.box(100);
    p5.pop();
  };
};

export function App() {
  const [rotation, setRotation] = useState(0);
  const [frameCount, setFrameCount] = useState(0);

  const updater = useCallback<Updater<MySketchProps>>((instance, props) => {
    setFrameCount(instance.frameCount);
  }, []);

  return <P5Canvas sketch={sketch} updater={updater} rotation={rotation} />;
}

The updater callback receives the p5 instance and the current sketch props. It is not passed to updateWithProps, so it does not leak React concerns into your sketch logic.

Children

To render a component on top of the sketch, add it as a child of P5Canvas and use the exported CanvasContainerClassName constant to style the overlay via CSS.

Example with styled-components

import { CanvasContainerClassName, P5Canvas } from "@p5-wrapper/react";
import styled, { createGlobalStyle } from "styled-components";

const GlobalWrapperStyles = createGlobalStyle`
  .${CanvasContainerClassName} {
    position: relative;
  }
`;

const StyledCentredText = styled.span`
  .${CanvasContainerClassName} & {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: white;
    font-size: 2rem;
    margin: 0;
    text-align: center;
  }
`;

export function App() {
  const [rotation, setRotation] = useState(0);

  useEffect(() => {
    const interval = setInterval(
      () => setRotation(rotation => rotation + 100),
      100
    );

    return () => {
      clearInterval(interval);
    };
  }, []);

  return (
    <Fragment>
      <GlobalWrapperStyles />
      <P5Canvas sketch={sketch} rotation={rotation}>
        <StyledCentredText>Hello world!</StyledCentredText>
      </P5Canvas>
    </Fragment>
  );
}

You can use any CSS-in-JS library or plain CSS — just target the wrapper class as your root selector.

Fallback UIs

If the sketch prop is undefined, you can provide a fallback UI:

import * as React from "react";
import { P5Canvas } from "@p5-wrapper/react";

function sketchOne(p5) {
  p5.setup = () => p5.createCanvas(600, 400, p5.WEBGL);
  p5.draw = () => {
    p5.background(250);
    p5.normalMaterial();
    p5.push();
    p5.rotateZ(p5.frameCount * 0.01);
    p5.rotateX(p5.frameCount * 0.01);
    p5.rotateY(p5.frameCount * 0.01);
    p5.plane(100);
    p5.pop();
  };
}

function sketchTwo(p5) {
  p5.setup = () => p5.createCanvas(600, 400, p5.WEBGL);
  p5.draw = () => {
    p5.background(500);
    p5.normalMaterial();
    p5.push();
    p5.rotateZ(p5.frameCount * 0.01);
    p5.rotateX(p5.frameCount * 0.01);
    p5.rotateY(p5.frameCount * 0.01);
    p5.plane(100);
    p5.pop();
  };
}

export function App() {
  const [sketch, setSketch] = React.useState(undefined);
  const chooseNothing = () => setSketch(undefined);
  const chooseSketchOne = () => setSketch(sketchOne);
  const chooseSketchTwo = () => setSketch(sketchTwo);

  return (
    <>
      <ul>
        <li>
          <button onClick={chooseNothing}>Choose nothing</button>
        </li>
        <li>
          <button onClick={chooseSketchOne}>Choose sketch 1</button>
        </li>
        <li>
          <button onClick={chooseSketchTwo}>Choose sketch 2</button>
        </li>
      </ul>
      <P5Canvas fallback={<h1>No sketch selected yet.</h1>} sketch={sketch} />
    </>
  );
}

When no sketch is selected, the fallback UI is shown. Selecting a sketch replaces it with the canvas.

Error and Loading UIs

You can pass error and loading props to customise what is shown when something goes wrong or while the component is loading.

Error UIs

Pass a function to the error prop to handle errors thrown within the sketch or its children:

import * as React from "react";
import { P5Canvas, P5CanvasInstance } from "@p5-wrapper/react";

function ErrorChild() {
  throw new Error("oops");
}

function ErrorUI(error: unknown) {
  if (error instanceof Error) {
    return <p>An error occurred: {error.message}</p>;
  }

  return <p>An unknown error occurred: {String(error)}</p>;
}

function sketch(p5: P5CanvasInstance) {
  p5.setup = () => p5.createCanvas(600, 400, p5.WEBGL);
  p5.draw = () => {
    p5.background(250);
    p5.normalMaterial();
    p5.push();
    p5.rotateZ(p5.frameCount * 0.01);
    p5.rotateX(p5.frameCount * 0.01);
    p5.rotateY(p5.frameCount * 0.01);
    p5.plane(100);
    p5.pop();
  };
}

export function App() {
  return (
    <P5Canvas sketch={sketch} error={ErrorUI}>
      <ErrorChild />
    </P5Canvas>
  );
}

JS/TS allow you to throw any value, not just Error instances. Always check error instanceof Error before accessing .message.

Loading UIs

Pass a function to the loading prop to show a custom UI while the component is being lazy loaded:

import * as React from "react";
import { P5Canvas, P5CanvasInstance } from "@p5-wrapper/react";

function LoadingUI() {
  return <p>The sketch is being loaded.</p>;
}

function sketch(p5: P5CanvasInstance) {
  p5.setup = () => p5.createCanvas(600, 400, p5.WEBGL);
  p5.draw = () => {
    p5.background(250);
    p5.normalMaterial();
    p5.push();
    p5.rotateZ(p5.frameCount * 0.01);
    p5.rotateX(p5.frameCount * 0.01);
    p5.rotateY(p5.frameCount * 0.01);
    p5.plane(100);
    p5.pop();
  };
}

export function App() {
  return <P5Canvas sketch={sketch} loading={LoadingUI} />;
}

P5 plugins and constructors

Using plugins (e.g. p5.sound)

Since P5 is used in instance mode, plugins are not loaded automatically. You need to set p5 on the window object before importing the plugin:

import * as p5 from "p5";
import { P5Canvas, Sketch } from "@p5-wrapper/react";
import React, { useEffect, useState } from "react";

(window as any).p5 = p5;

await import("p5/lib/addons/p5.sound");

const sketch: Sketch = p5 => {
  let song: p5.SoundFile;
  let button: p5.Element;

  p5.setup = () => {
    p5.createCanvas(600, 400, p5.WEBGL);
    p5.background(255, 0, 0);
    button = p5.createButton("Toggle audio");

    button.mousePressed(() => {
      if (!song) {
        const songPath = "/piano.mp3";
        song = p5.loadSound(
          songPath,
          () => {
            song.play();
          },
          () => {
            console.error(
              `Could not load the requested sound file ${songPath}`
            );
          }
        );
        return;
      }

      if (!song.isPlaying()) {
        song.play();
        return;
      }

      song.pause();
    });
  };

  p5.draw = () => {
    p5.background(250);
    p5.normalMaterial();
    p5.push();
    p5.rotateZ(p5.frameCount * 0.01);
    p5.rotateX(p5.frameCount * 0.01);
    p5.rotateY(p5.frameCount * 0.01);
    p5.plane(100);
    p5.pop();
  };
};

export default function App() {
  return <P5Canvas sketch={sketch} />;
}

Key points:

p5 must be set on window before importing the plugin.
Audio must be triggered by a user action (e.g. a button click) — browsers block autoplay.
Safari blocks audio from all tabs by default; users may need to change this in their browser settings.

Note: This example requires top level await, dynamic imports and the stream API (HTTPS only).

Using constructors (e.g. p5.Vector)

In instance mode, constructors are accessed via p5.constructor instead of the global p5 namespace:

Constructor	Global mode	Instance mode
Vector	p5.Vector	p5.constructor.Vector
Envelope	p5.Envelope	p5.constructor.Envelope

For example, to get a random 2D vector, call p5.constructor.Vector.random2D() instead of p5.Vector.random2D().

Development

The source code for the component is in the src directory and the demo application is in the demo directory. You will need Node.js and pnpm — the exact versions are pinned in package.json.

To build, watch and serve the examples (which also watches the component source):

pnpm dev

Contributing

Before opening a pull request, make sure your changes pass every quality gate:

pnpm integrate

AI-assisted contributions

Commit with --signoff (git commit -s) so that you certify the Developer Certificate of Origin for the work yourself
Optionally credit the agent with an Assisted-by: LLM trailer in the commit message, as recommended by the Linux kernel team
Ensure all work adheres to the MIT licence

See AGENTS.md for the full set of rules agents follow in this repository.

P5-wrapper/react（新しいタブで開きます）

README

@P5-wrapper/react

Installation

Demo & Examples

Usage

JavaScript

TypeScript

Using abstracted setup and draw functions

Props

Reacting to props

Typed props with generics

Custom updaters

Children

Fallback UIs

Error and Loading UIs

Error UIs

Loading UIs

P5 plugins and constructors

Development

Contributing

AI-assisted contributions

README

@P5-wrapper/react

Installation

Demo & Examples

Usage

JavaScript

TypeScript

Using abstracted setup and draw functions

Props

Reacting to props

Typed props with generics

Custom updaters

Children

Fallback UIs

Error and Loading UIs

Error UIs

Loading UIs

P5 plugins and constructors

Development

Contributing

AI-assisted contributions