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Documentation Index

Fetch the complete documentation index at: https://bun.com/docs/llms.txt

Use this file to discover all available pages before exploring further.

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.
Refer to the Runtime > Node.js APIs page for more detailed compatibility information.
terminal
bun add express
To define an HTTP route and start a server with Express:
https://mintcdn.com/bun-1dd33a4e/JUhaF6Mf68z_zHyy/icons/typescript.svg?fit=max&auto=format&n=JUhaF6Mf68z_zHyy&q=85&s=7ac549adaea8d5487d8fbd58cc3ea35bserver.ts
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:
terminal
bun server.ts