SvelteKit adapter for uWebSockets.js

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library 0.5.8 ·javascript
verified Jun 7, 2026

svelte-adapter-uws is a SvelteKit adapter that runs the app on uWebSockets.js, a high-performance C++ HTTP server with native WebSocket support. Current version is 0.5.8, with active development. It targets Node.js >=22 and requires ws (for WebSocket polyfill), Svelte 4 or 5, and @sveltejs/kit 2. Notably faster than the default Node adapter, especially for WebSocket-heavy applications, due to uWebSockets.js's low-level, event-driven architecture. Ships TypeScript definitions.