bun.sh/docs/guides/ecosystem/express.md

name

name
Build an HTTP server using Express and Bun

Express and other major Node.js HTTP libraries should work out of the box. Bun implements the node:http and node:https modules that these libraries rely on.

{% callout %} Refer to the Runtime > Node.js APIs page for more detailed compatibility information. {% /callout %}

$ bun add express

---

To define a simple HTTP route and start a server with Express:

import express from "express";

const app = express();
const port = 8080;

app.get("/", (req, res) => {
  res.send("Hello World!");
});

app.listen(port, () => {
  console.log(`Listening on port ${port}...`);
});

---

To start the server on localhost:

$ bun server.ts