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

Learn more about the Deno runtime in the documentation .

Install the Deno runtime on your system using one of the commands below. Note that there are a number of ways to install Deno - a comprehensive list of installation options can be found here .

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

Complete instructions for building Deno from source can be found in the manual here .

Deno can be used for many different applications, but is most commonly used to build web servers. Create a file called server.ts and include the following TypeScript code:

Deno
.
serve
(
(
_req
: 
Request
)
 =>
 {

  return
 new
 Response
(
"Hello, world!"
)
;

}
)
;

Run your server with the following command:

deno run --allow-net server.ts

This should start a local web server on http://localhost:8000 .

Learn more about writing and running Deno programs in the docs .

• Deno Docs : official guides and reference docs for the Deno runtime, Deno Deploy , and beyond.
• Deno Standard Library : officially supported common utilities for Deno programs.
• deno.land/x : registry for third-party Deno modules.
• Developer Blog : Product updates, tutorials, and more from the Deno team.

We appreciate your help! To contribute, please read our contributing instructions .