ElysiaJs

ElysiaJS is an end-to-end type-safe web framework for TypeScript, designed primarily for Bun but also compatible with other JavaScript run times. Unlike alternatives such as tRPC, which enforces specific API interface structures, ElysiaJS does not impose any API interface structure. This allows developers to create APIs that follow established industry practices such as RESTful, JSON:API or OpenAPI and also provide end-to-end type safety. ElysiaJS is highly performant when used with Bun run time, even comparable to Java or Go web frameworks in some benchmarks. ElysiaJS is worth considering, especially when building a backend-for-frontend (BFF).