Quick Start

Elysia is a TypeScript backend framework with multiple runtime support but optimized for Bun.
However, you can use Elysia with other runtimes like Node.js.

Bun

Elysia is optimized for Bun, a JavaScript runtime that aims to be a drop‑in replacement for Node.js.

You can install Bun with the command below:

# MacOS/Linux
curl -fsSL https://bun.sh/install | bash

# Windows
irm bun.sh/install.ps1 | iex

Auto Installation

We recommend starting a new Elysia server using bun create elysia, which sets up everything automatically.

bun create elysia app

Once done, you should see the folder name app in your directory.

cd app

Start a development server by:

bun dev

Navigate to http://localhost:3000 – it should greet you with “Hello Elysia”.

TIP
Elysia ships you with dev command to automatically reload your server on file change.