unjs
Comprehensive ecosystem of single-purpose JavaScript libraries for universal, runtime-agnostic development.
- Covers 50+ packages across HTTP frameworks (H3, Nitro), utilities (path, URL, hashing), storage, CLI tools, and build systems
- Supports multiple runtimes: Node.js, browsers, edge environments, Deno, Bun, and Cloudflare Workers
- Includes specialized tools for image processing, WebAssembly, PDF handling, QR codes, crypto, and database connectivity
- Designed for composability: libraries work independently or together to build universal JavaScript applications
UnJS (Unified JavaScript) is an ecosystem of high-quality, single-purpose JavaScript libraries and tools designed to work together and independently across any environment. These skills cover the core packages and their practical usage patterns for building universal JavaScript applications.
The skill is based on UnJS website, generated at 2026-01-31.
Core References
HTTP & Server
| Topic | Description | Reference |
|---|---|---|
| H3 Framework | Minimal HTTP framework for high performance and portability | core-h3 |
| Nitro Server | Universal web server framework that runs anywhere | core-nitro |
| Listhen | Elegant HTTP listener for Node.js and edge environments | core-listhen |
Utilities
| Topic | Description | Reference |
|---|---|---|
| Defu | Recursive default property assignment | core-defu |
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