Robert
Disclaimer
Don't panic. Node isn't going anywhere.
What is Deno?
From deno.land:
Deno is a simple, modern and secure runtime for JavaScript and TypeScript that uses V8 and is built in Rust.
- Secure by default. No file, network, or environment access, unless explicitly enabled.
- Supports TypeScript out of the box.
- Ships only a single executable file.
- Has built-in utilities like a dependency inspector (deno info) and a code formatter (deno fmt).
- Has a set of reviewed (audited) standard modules that are guaranteed to work with Deno: deno.land/std
But why!?
From Ryan Dahl:
JavaScript has changed significantly since Node was designed in 2009. Notably:
- Promises / Async / Await
- ES Modules
- Typed Arrays
Node has problems:
- A poorly designed module system, with centralized distribution.
- Lots of legacy APIs that must be supported.
- Security
(These problems aren't unique to Node. Python and Ruby suffer similary)
Ryan Dahl's HolyJS talk
Installation
Using shell
curl -fsSL https://deno.land/x/install/install.sh | sh
Using homebrew
brew install deno
Getting Started
A sample http server
import { serve } from "https://deno.land/std@0.50.0/http/server.ts";
const s = serve({ port: 8000 });
console.log("http://localhost:8000/");
for await (const req of s) {
req.respond({ body: "Hello World\n" });
}
Blog post: https://deno.land/v1
