Deno vs. Node.js — Here Are the Most Important Differences

Security, both under the hood, the window-object & TypeScript support

Is Deno the new Node.js? Or is it just a nice alternative? In this article we will go into some important differences and features — have fun!

The main differences between Node.js & Deno:

• Deno uses Rust under the hood, but also the V8 engine, just like Node.js.
• Deno supports TypeScript out of the box. It can also deal with JavaScript, without any problem, out of the box.
• Deno does not support NPM packages, and does not use the node_modules directory. Libraries are imported via the URL.
• Deno uses a permission-system for code to be executed.
• The window object is supported in Deno — even though, we are writing back-end code.

The history and story behind Deno

Now already treated by some as the next big thing, and come to displace Node.js, both have one origin: Ryan Dahl

Dahl worked on the Node project since 2009, but stepped back from it a few years later. In 2018 he gave the 10 Things I Regret About Node.js talk, in which he also announced Deno — a new…