A modern runtime for JavaScript and TypeScript.
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fix(webgpu): crash after isolate disposal (#30909)
this loop doesn't inherently stop running when the isolate stops
running, so use the isolate task spawner to ensure logic only runs when
the event loop is still running. it would be nice to move this logic
inside the DeviceErrorHandler (we could get rid of the task loop!) but
it creates a cyclic dependency on the device object which was annoying
to think about.
2025-10-04 07:53:24 +02:00
.cargo ci: fix Windows build (#30816) 2025-09-23 00:31:14 +00:00
.devcontainer feat(ext/fetch): add support for fetch on unix sockets (#29154) 2025-05-13 18:06:17 +02:00
.github 2.5.3 (#30903) 2025-10-02 22:05:24 -04:00
bench_util 2.5.3 (#30903) 2025-10-02 22:05:24 -04:00
cli fix(ext/node): fs.stat and fs.statSync compatibility (#30866) 2025-10-03 11:34:01 -04:00
ext fix(webgpu): crash after isolate disposal (#30909) 2025-10-04 07:53:24 +02:00
libs 2.5.3 (#30903) 2025-10-02 22:05:24 -04:00
runtime 2.5.3 (#30903) 2025-10-02 22:05:24 -04:00
tests fix(ext/node): fs.realpath buffer encoding (#30885) 2025-10-03 20:16:26 -07:00
tools chore(release): verify deno_docker release is successful (#30906) 2025-10-03 11:30:54 -04:00
.dlint.json chore: enable no-console dlint rule (#25113) 2024-08-20 15:14:37 -04:00
.dprint.json fix: upgrade to swc_ecma_parser 23 (#30564) 2025-08-29 15:36:36 -04:00
.editorconfig chore(tests): Remove vestiges of cli/tests folder (#22712) 2024-03-05 13:49:21 -07:00
.gitattributes chore: move cli/tests/ -> tests/ (#22369) 2024-02-10 20:22:13 +00:00
.gitignore feat(bundle, unstable): bundling backed by esbuild (#29470) 2025-06-07 21:20:10 +02:00
.gitmodules chore(ext/node): reorg node compat test CI check (#29893) 2025-06-27 21:06:18 +09:00
.rustfmt.toml chore: update to edition 2024 (#29923) 2025-07-02 17:59:39 -07:00
Cargo.lock 2.5.3 (#30903) 2025-10-02 22:05:24 -04:00
Cargo.toml 2.5.3 (#30903) 2025-10-02 22:05:24 -04:00
import_map.json chore: update submodule std version (#30676) 2025-09-11 17:48:32 +09:00
LICENSE.md chore: Happy New Year 2025 (#27509) 2024-12-31 19:12:39 +00:00
README.md chore: update "Build from source" link in README (#29258) 2025-05-12 15:41:53 +09:00
Releases.md 2.5.3 (#30903) 2025-10-02 22:05:24 -04:00
rust-toolchain.toml chore: upgrade to Rust 1.90 (#30793) 2025-09-29 15:16:55 -04:00

Deno

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the deno mascot dinosaur standing in the rain

Deno (/ˈdiːnoʊ/, 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.

Installation

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

WinGet (Windows):

winget install --id=DenoLand.Deno

Build and install from source

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

Your first Deno program

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.

Additional resources

  • 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.
  • JSR: The open-source package registry for modern JavaScript and TypeScript
  • Developer Blog: Product updates, tutorials, and more from the Deno team.

Contributing

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