Individual skill
melonjs-renderer-backends
Use this skill when a feature works on one machine and not another, when choosing or pinning a renderer, or when writing code that must degrade gracefully. Covers the WebGPU to WebGL 2 to Canvas fallback ladder, what each backend supports, capability detection, and the subsystems that warn once and then stop working on Canvas. Triggers on: video.AUTO, video.WEBGPU, video.WEBGL, video.CANVAS, renderer.type, supportsDepthBuffer, shaderLanguage, WebGPU, WebGL2, Canvas fallback, context loss, backend, works on my machine.
packages/melonjs/skills/melonjs-renderer-backends/SKILL.md
Source commit a41d6a328557d69a0441d79bbeb9cd6c430275b5
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- Matches the observed repository HEAD
- Yes
- Scanner rules are current
- Yes
- Repository scan complete
- No
- Skill scan complete
- No
- Observed behavior
- Network or broad shell
- Last checked
- Nov 5, 2026
These are observations at the recorded commit, not a guarantee of safety. Review the source before running it.
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Repository context
- Repository stars (not skill ratings)
- 6,440
- Repository last updated
- Nov 7, 2026
- License
- MIT
Observed agent integration: No specific integration evidence. Standard SKILL.md installation does not imply verified compatibility.
- html5-game-engine Repository topic
- javascript-game-engine Repository topic
- 2d Repository topic
- agent-skills Repository topic
- canvas Repository topic
- contributions-welcome Repository topic
- game-development Repository topic
- game-framework Repository topic
- gamedev Repository topic
- gltf Repository topic
- writing Derived category
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# Renderer backends and graceful degradation
> `video.AUTO` picks a backend at **runtime**. The same code runs on a different
> renderer depending on the machine, and several subsystems degrade to nothing
> rather than erroring. This is the root cause of most "works on my machine"
> reports.
## The ladder
`video.AUTO` (the default) tries **WebGPU → WebGL 2 → Canvas** and uses the first
that initialises.
```js
const app = new Application(800, 600, {