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Express and other major Node.js HTTP libraries should work in Bun without changes. Bun implements the node:http and node:https modules that these libraries rely on.
See Node.js compatibility for details.
terminal
bun add express
To define an HTTP route and start a server with Express:
server.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
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