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 '@elysia/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 uses type hints to provide type safety for the client.

See Eden Treaty.

Assignment ​

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