Welcome to Deno

Deno (/ˈdiːnoʊ/, pronounced dee-no) is an open source JavaScript, TypeScript, and WebAssembly runtime with secure defaults and a great developer experience. It's built on V8, Rust, and Tokio.

Why Deno? Jump to heading#

• Deno is TypeScript-ready out of the box. Zero config or additional steps necessary.
• Deno is secure by default. Where other runtimes give full access every script they run, Deno allows you to enforce granular permissions.
• Deno has a robust built-in toolchain. Unlike Node or browser JavaScript, Deno includes a standard library, along with a first-party linter/formatter, test runner, and more.
• Deno is fully compatible with Node and npm.
• Deno is fast and reliable.
• Deno is open-source.

Quick install Jump to heading#

Install the Deno runtime on your system using one of the terminal commands below:

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

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

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

Additional installation options can be found here. After installation, you should have the deno executable available on your system path. You can verify the installation by running:

deno --version

First steps Jump to heading#

Deno can run JavaScript and TypeScript with no additional tools or configuration required, all in a secure, batteries-included runtime.

• Making a Deno project
• Setting up your environment
• Using the CLI