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Getting Started
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.
Let's create and run your first Deno program in under five minutes.
Install Deno 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
Hello World Jump to heading
Deno can run JavaScript and TypeScript with no additional tools or configuration required. Let's create a simple "hello world" program and run it with Deno.
Create a TypeScript or JavaScript file called main
and include the following
code:
function greet(name: string): string {
return `Hello, ${name}!`;
}
console.log(greet("world"));
function greet(name) {
return `Hello, ${name}!`;
}
console.log(greet("world"));
Save the file and run it with Deno:
$ deno main.ts
Hello, world!
$ deno main.js
Hello, world!
Next Steps Jump to heading
Congratulations! You've just run your first Deno program. Read on to learn more about the Deno runtime.