---
name: matterjs
description: Use when implementing 2D physics interactions with Matter.js, including Engine/World setup, Render/Runner configuration, adding bodies and constraints, and scroll/interaction-friendly canvas scenes.
---

# Matter.js Skill

## Workflow
1. Confirm environment (plain HTML, React, or canvas-only) and rendering approach (Matter.Render for debug vs custom renderer).
2. Provide a minimal Engine/World/Render/Runner setup and add bodies.
3. Add interactions (mouse constraint) or constraints only if requested.
4. Share cleanup steps for SPA or teardown scenarios.

## Minimal setup
```html
<script>
  const { Engine, Render, Runner, Bodies, Composite } = Matter;

  const engine = Engine.create();

  const render = Render.create({
    element: document.body,
    engine: engine,
    options: {
      width: 800,
      height: 600,
      wireframes: false
    }
  });

  const runner = Runner.create();
  Runner.run(runner, engine);
  Render.run(render);

  const ground = Bodies.rectangle(400, 610, 810, 60, { isStatic: true });
  const box = Bodies.rectangle(400, 200, 80, 80);

  Composite.add(engine.world, [ground, box]);
</script>
```

## Common patterns
- Use `Composite.add(engine.world, [...])` to add bodies to the world.
- Use `Render.create({ element, engine })` to create a canvas automatically, or pass a `canvas` you create yourself.
- Set `render.options.wireframes = false` for solid rendering.
- Use `Runner.run(runner, engine)` for a simple loop, or call `Engine.update` in your own loop if you need custom timing.

## Mouse interaction (optional)
```js
const { Mouse, MouseConstraint } = Matter;
const mouse = Mouse.create(render.canvas);
const mouseConstraint = MouseConstraint.create(engine, { mouse });
Composite.add(engine.world, mouseConstraint);
render.mouse = mouse;
```

## Cleanup checklist (SPA)
- Stop the runner with `Runner.stop(runner)`.
- Remove the render canvas from the DOM.
- Clear engine and world if needed.

## Questions to ask when specs are missing
- What viewport size and scaling should the canvas use?
- Are we using Matter.Render or a custom renderer?
- Do you want mouse/touch drag interaction?
- Should the simulation loop be paused when offscreen?


---
Source attribution: MengTo
Original project: https://github.com/MengTo/Skills
License: MIT
License information: https://opensource.org/license/mit
Original upstream instructions; downloaded from Mega AI Hub.

## Upstream license notice

MIT License

Copyright (c) 2026 Gabriel Moreira

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.



# Mega AI Hub resource metadata

Creator / publisher: MengTo
Original project: https://github.com/MengTo/Skills
Attribution basis: Upstream repository explicitly recorded in package mirror path

Fields of work: Development & Engineering, Product Management
Roles: Frontend Developer, Game Developer, Product Manager
Specialties: Cross Platform, Frontend, Mobile
Tools: Matterjs
Country applicability: Country not specified
Classification basis: Source catalog labels
Instruction SHA-256: eeb1d2f6521e337dd5a5f0743ba00c00dd81f6e22b22a6f26c5d77fc44f16be4