Elysia

elysiajs.com

Ergonomic Framework for Humans

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Elysia screenshot
/ About /

Elysia is a TypeScript web framework optimized for Bun that emphasizes end-to-end type safety, high performance, and developer ergonomics. It uses a single schema as the source of truth for request validation, type inference, and OpenAPI documentation generation. Elysia supports multiple validators, WebSockets, OpenTelemetry, and client-server type sharing via its Eden client.

/ How it works /

Developers define a schema once that drives runtime request validation, TypeScript type inference, and OpenAPI documentation generation, all within a fluent API running on the Bun runtime.

/ Who it's for /

TypeScript and JavaScript backend developers

/ More info /

Background.

Status
launched
Business model
open-source
/ Discovered patterns /

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