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https://github.com/denoland/deno

A modern runtime for JavaScript and TypeScript.
https://github.com/denoland/deno

deno javascript rust typescript

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A modern runtime for JavaScript and TypeScript.

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# Deno



[![](https://img.shields.io/crates/v/deno.svg)](https://crates.io/crates/deno)

[![Twitter badge][]][Twitter link] [![Discord badge][]][Discord link]

[![YouTube badge][]][YouTube link]



the deno mascot dinosaur standing in the rain



[Deno](https://www.deno.com)

([/ˈdiːnoʊ/](http://ipa-reader.xyz/?text=%CB%88di%CB%90no%CA%8A), pronounced

`dee-no`) is a JavaScript, TypeScript, and WebAssembly runtime with secure

defaults and a great developer experience. It's built on [V8](https://v8.dev/),

[Rust](https://www.rust-lang.org/), and [Tokio](https://tokio.rs/).



Learn more about the Deno runtime

[in the documentation](https://docs.deno.com/runtime/manual).



## 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](https://docs.deno.com/runtime/manual/getting_started/installation).



Shell (Mac, Linux):



```sh

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

```



PowerShell (Windows):



```powershell

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

```



[Homebrew](https://formulae.brew.sh/formula/deno) (Mac):



```sh

brew install deno

```



[Chocolatey](https://chocolatey.org/packages/deno) (Windows):



```powershell

choco install deno

```



### Build and install from source



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

[here](https://docs.deno.com/runtime/manual/references/contributing/building_from_source).



## 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:



```ts

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

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

});

```



Run your server with the following command:



```sh

deno run --allow-net server.ts

```



This should start a local web server on

[http://localhost:8000](http://localhost:8000).



Learn more about writing and running Deno programs

[in the docs](https://docs.deno.com/runtime/manual).



## Additional resources



- **[Deno Docs](https://docs.deno.com)**: official guides and reference docs for

  the Deno runtime, [Deno Deploy](https://deno.com/deploy), and beyond.

- **[Deno Standard Library](https://deno.land/std)**: officially supported

  common utilities for Deno programs.

- **[deno.land/x](https://deno.land/x)**: registry for third-party Deno modules.

- **[Developer Blog](https://deno.com/blog)**: Product updates, tutorials, and

  more from the Deno team.



## Contributing



We appreciate your help! To contribute, please read our

[contributing instructions](https://docs.deno.com/runtime/manual/references/contributing/).



[Build status - Cirrus]: https://github.com/denoland/deno/workflows/ci/badge.svg?branch=main&event=push

[Build status]: https://github.com/denoland/deno/actions

[Twitter badge]: https://img.shields.io/twitter/follow/deno_land.svg?style=social&label=Follow

[Twitter link]: https://twitter.com/intent/follow?screen_name=deno_land

[YouTube badge]: https://img.shields.io/youtube/channel/subscribers/UCqC2G2M-rg4fzg1esKFLFIw?style=social

[YouTube link]: https://www.youtube.com/@deno_land

[Discord badge]: https://img.shields.io/discord/684898665143206084?logo=discord&style=social

[Discord link]: https://discord.gg/deno