End-to-End Type Safety

Elysia provides an end-to-end type safety between backend and frontend without code generation similar to tRPC, using Eden.

import { Elysia } from 'elysia'
import { treaty } from '@elysiajs/eden'

// Backend
export const app = new Elysia()
	.get('/', 'Hello Elysia!')
	.listen(3000)

// Frontend
const client = treaty<typeof app>('localhost:3000')

const { data, error } = await client.get()

console.log(data) // Hello World

This works by inferring the types from the Elysia instance, and use type hints to provide type safety for the client.

See Eden Treaty.

Assignment

Let's tab the icon in the preview to see how's the request is logged.