deno/README.md

Deno

Deno is a simple, modern and secure runtime for JavaScript and TypeScript that uses V8 and is built in Rust.

Features

• Secure by default. No file, network, or environment access, unless explicitly enabled.
• Provides web platform functionality and APIs, e.g. using ES modules, web workers, and fetch().
• Supports TypeScript out of the box.
• Ships only a single executable file.
• Built-in tooling including deno test, deno fmt, deno bench, and more.
• Includes a set of reviewed standard modules guaranteed to work with Deno.
• Supports npm.

Install

Shell (Mac, Linux):

curl -fsSL https://deno.land/install.sh | sh

PowerShell (Windows):

irm https://deno.land/install.ps1 | iex

Homebrew (Mac):

brew install deno

Chocolatey (Windows):

choco install deno

Scoop (Windows):

scoop install deno

Build and install from source using Cargo:

# Install build dependencies
apt install -y cmake protobuf-compiler # Linux
brew install cmake protobuf # macOS

# Build and install Deno
cargo install deno --locked

See deno_install and releases for other options.

Getting Started

Try running a simple program:

deno run https://examples.deno.land/hello-world.ts

Or setup a simple HTTP server:

Deno.serve((_req) => new Response("Hello, World!"));

More Examples

Additional Resources

• The Deno Manual is a great starting point for additional examples, setting up your environment, using npm, and more.
• Runtime API reference documents all APIs built into Deno CLI.
• Deno Standard Modules do not have external dependencies and are reviewed by the Deno core team.
• deno.land/x is the registry for third party modules.
• Blog is where the Deno team shares important product updates and “how to”s about solving technical problems.

Contributing

We appreciate your help!

To contribute, please read our contributing instructions.