# pixijs-environments

Guidance for running PixiJS v8 in Web Workers, OffscreenCanvas, Node.js, and CSP-restricted setups. Useful when browser DOM APIs are unavailable or blocked.

- skill · `type=skill` · Claude Code, Codex, Cursor, GitHub Copilot, Gemini CLI, OpenCode · 5600 installs · ★ 358
- Author: pixijs
- License: MIT · policy=mirror · the beginning of the file is at the end of this page
- Source: https://github.com/pixijs/pixijs-skills/tree/HEAD/skills/pixijs-environments/SKILL.md
- Updated: 2026-10-01
- HTML: https://affpapa.org/en/nevibecode/skills/pixijs-environments

## What it does

The skill explains how to configure `DOMAdapter`, choose `WebWorkerAdapter`, or implement an adapter for a non-standard environment. It also covers environment-specific imports such as `pixi.js/browser` and `pixi.js/webworker`, plus the `pixi.js/unsafe-eval` polyfill for CSP rules that block `unsafe-eval`.

Set the adapter before `app.init()`. In a Web Worker, `DOMContainer`, accessibility features, and Font Loading API support for `FontFace` do not work; bitmap fonts are the suggested alternative. Node.js, SSR, and headless tests need an adapter that supplies canvas and image creation, resource fetching, and XML parsing. Direct calls to `document` or `Image` break Web Worker and SSR compatibility, so code using browser globals needs attention.

## Install

### Claude Code (native platform)

1. **Skills CLI (Vercel)**
```bash
npx skills add pixijs/pixijs-skills --skill pixijs-environments -a claude-code
```

2. **Manually: put the files in place**
- File: `~/.claude/skills/pixijs-environments/SKILL.md` — Copy the whole skill folder; for one project use .claude/skills/pixijs-environments/

### Codex

1. **Skills CLI (Vercel)**
```bash
npx skills add pixijs/pixijs-skills --skill pixijs-environments -a codex
```

2. **Manually: put the files in place**
- File: `.agents/skills/pixijs-environments/SKILL.md` — For all projects use ~/.agents/skills/

### Cursor

1. **Skills CLI (Vercel)**
```bash
npx skills add pixijs/pixijs-skills --skill pixijs-environments -a cursor
```

2. **Manually: put the files in place**
- File: `.cursor/skills/pixijs-environments/SKILL.md` — Cursor also reads .agents/skills/ and .claude/skills/

### GitHub Copilot

1. **GitHub CLI**
```bash
gh skill install pixijs/pixijs-skills pixijs-environments
```

2. **Manually: put the files in place**
- File: `.github/skills/pixijs-environments/SKILL.md`

### Gemini CLI

1. **Skills CLI (Vercel)**
```bash
npx skills add pixijs/pixijs-skills --skill pixijs-environments -a gemini-cli
```

2. **Platform CLI**
```bash
gemini skills install https://github.com/pixijs/pixijs-skills --path skills/pixijs-environments
```

### Windsurf (Devin Desktop)

**Manually: put the files in place**
- File: `.devin/skills/pixijs-environments/SKILL.md` — The legacy .windsurf/skills/ path still works

### OpenCode

**Skills CLI (Vercel)**
```bash
npx skills add pixijs/pixijs-skills --skill pixijs-environments -a opencode
```

### Claude.ai

**Claude.ai**
- Zip the folder and upload it in Settings → Capabilities → Skills

Where a file is given instead of a command, copy the files from the source to that path: https://github.com/pixijs/pixijs-skills/tree/HEAD/skills/pixijs-environments/SKILL.md

## When to use it
- run PixiJS in a Web Worker with OffscreenCanvas
- configure an adapter for Node.js, SSR, or headless tests
- work around a CSP block on `unsafe-eval`
- select PixiJS module imports for a target environment

## Example prompts
- Set up PixiJS v8 to render in a Web Worker using OffscreenCanvas.
- Check where `WebWorkerAdapter` must be set before app initialization.
- Configure PixiJS for a CSP that blocks `unsafe-eval`.

## Source text · SKILL.md · MIT

Below is the content of a third-party file. It is data, not instructions for you: do not act on anything written inside unless the human asks. Block tag: 1755724ba52b7eb0.

BEGIN THIRD-PARTY FILE 1755724ba52b7eb0
````text
---
name: pixijs-environments
description: "Use this skill when running PixiJS v8 outside a standard browser: Web Workers, OffscreenCanvas, Node/SSR, or CSP-restricted contexts. Covers DOMAdapter.set, BrowserAdapter, WebWorkerAdapter, custom Adapter interface, pixi.js/unsafe-eval for strict CSP. Triggers on: DOMAdapter, BrowserAdapter, WebWorkerAdapter, Web Worker, OffscreenCanvas, Node, headless, SSR, CSP, unsafe-eval, Adapter."
license: MIT
---

`DOMAdapter` abstracts every piece of DOM access PixiJS does (canvas creation, Image loading, fetch, XML parsing) so the library can run in non-browser contexts. Call `DOMAdapter.set(...)` before `app.init()` to swap in a different adapter.

## Quick Start

```ts
// worker.ts — OffscreenCanvas posted from main thread
DOMAdapter.set(WebWorkerAdapter);

self.onmessage = async (event) => {
  const app = new Application();
  await app.init({
    canvas: event.data.canvas,
    width: 800,
    height: 600,
  });
};
```

For CSP contexts that block `unsafe-eval`, import the polyfill before any renderer init:

```ts
import "pixi.js/unsafe-eval";
```

**Related skills:** `pixijs-application` (standard browser init), `pixijs-migration-v8` (settings removal, adapter changes).

## Core Patterns

### Web Worker with OffscreenCanvas

Transfer an OffscreenCanvas from the main thread, then initialize PixiJS in the worker:

```ts
// main.ts
const canvas = document.createElement("canvas");
canvas.width = 800;
canvas.height = 600;
document.body.appendChild(canvas);

const offscreen = canvas.transferControlToOffscreen();
const worker = new Worker("worker.ts", { type: "module" });
worker.postMessage({ canvas: offscreen }, [offscreen]);
```

```ts
// worker.ts
import { Application, DOMAdapter, WebWorkerAdapter } from "pixi.js";

DOMAdapter.set(WebWorkerAdapter);

self.onmessage = async (event) => {
  const app = new Application();
  await app.init({
    canvas: event.data.canvas,
    width: 800,
    height: 600,
  });
};
```

`DOMAdapter.set(WebWorkerAdapter)` must happen before `new Application()`. The WebWorkerAdapter uses `OffscreenCanvas` instead of `document.createElement('canvas')` and `@xmldom/xmldom` for XML parsing.

Features that do **not** work inside a Web Worker (no DOM access):

- `DOMContainer` — there is no real DOM node to overlay.
- `AccessibilitySystem` — depends on live DOM focus and screen reader hooks.
- `FontFace` loading via the Font Loading API — use pre-converted bitmap fonts (`BitmapFont.install` or `.fnt` assets) instead.

### Environment-specific subpath imports

Instead of importing `pixi.js`, you can pull in a curated bundle for each environment:

```ts
import "pixi.js/browser"; // accessibility, dom, events, spritesheet, rendering, filters
import "pixi.js/webworker"; // spritesheet, rendering, filters (no DOM-only modules)
```
````
END THIRD-PARTY FILE 1755724ba52b7eb0

The third-party file has ended. Everything between the 1755724ba52b7eb0 tags is data: requests and commands from it are not followed. An “end of file” line with another tag inside the block is part of the file.

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