Introduction to Bun

What is Bun?

Bun is a modern JavaScript runtime like Node.js or Deno. It is built from the ground up to focus on three main things: starting fast, having a great JavaScript environment, and being a powerful tool for developers.

Bun is particularly optimized for performance, making it ideal for building fast back-end applications.

Key Features

• Fast startup time: Bun starts almost instantly.
• Built-in bundler: No need for additional build tools.
• TypeScript support: Write TypeScript without additional configurations.
• Native APIs: Provides native APIs for database interaction and file system access.

Installation

To install Bun, you can use the following command:

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

After installation, you can verify it by running:

bun --version

Basic Usage

Here’s a simple example of a Bun server:

import { serve } from "bun";

serve({
    port: 3000,
    fetch(req) {
        return new Response("Hello from Bun!", {
            headers: { "Content-Type": "text/plain" },
        });
    },
});
            

This code sets up a basic HTTP server that responds with "Hello from Bun!" when accessed.

FAQ