# Deno

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<img align="right" src="https://deno.land/logo.svg" height="150px" alt="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://jsr.io/@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/).

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