Deno 2.0 Changes Everything

When Deno launched in 2018, it was a bold experiment by Node.js creator Ryan Dahl. But the lack of npm compatibility made it impractical for real projects. Deno 2.0 fixes this — completely.

What’s New in Deno 2.0

Full npm Compatibility

import express from "npm:express";
// Just works. No node_modules folder needed.

Node.js Built-in Module Support

import { readFileSync } from "node:fs";
import { join } from "node:path";
// All Node.js APIs supported

Package.json Support

Deno now reads package.json if present. Your existing Node.js projects can run in Deno with zero changes in most cases.

Stable Standard Library

import { parse } from "jsr:@std/csv";
import { serve } from "jsr:@std/http";
// Battle-tested, maintained by the Deno team

Deno vs Node vs Bun

Feature Deno 2.0 Node.js 22 Bun 1.1
TypeScript Native Needs build step Native
npm support Full Native Full
Security Permission-based None None
Formatter Built-in Need Prettier Built-in
Linter Built-in Need ESLint None
Test runner Built-in Need Jest/Vitest Built-in
Speed Fast Moderate Fastest

Why Consider Deno Now

  1. Zero config TypeScript — No tsconfig needed
  2. Security by default — Scripts can’t access network/disk without explicit permission
  3. All-in-one toolchain — Format, lint, test, compile, all built-in
  4. JSR registry — Modern package registry with TypeScript-first packages
  5. Deploy to edge — Deno Deploy runs your code globally in 35+ regions

Should You Switch?

For new projects: Deno 2.0 is a compelling choice if you value DX and security. The npm compatibility means you won’t miss any packages.

For existing projects: Stay on Node.js unless you have a specific reason to migrate. The ecosystem and community support are still larger.