Deno 2.0: The Node.js Competitor Worth Watching

Deno 2.0 dropped with Node.js compatibility at the top of the feature list. Ryan Dahl's "fixed Node.js" is finally pragmatic enough to use in real projects.

What Changed in Deno 2.0

The original Deno was ambitious but incompatible with Node.js ecosystem. Deno 2.0 changed the calculation:

Node.js Compatibility

// Deno 2.0 runs most Node.js code
import express from 'npm:express@4';
const app = express();
app.get('/', (req, res) => res.send('Hello from Deno!'));
app.listen(3000);

npm: imports work. Most Node packages work. This was the missing piece.

Package Management

// deno.json (replaces package.json)
{
  "imports": {
    "express": "npm:express@4",
    "@/": "./src/"
  },
  "tasks": {
    "dev": "deno run --watch main.ts",
    "start": "deno run main.ts"
  }
}

No node_modules. Dependencies cached globally. Clean.

What Deno Still Does Better Than Node

Security by Default

# Node.js: full system access always
node server.js
 
# Deno: explicit permissions required
deno run --allow-net --allow-read server.ts
# Anything not listed is blocked

Built-in TypeScript

# Deno runs TypeScript natively, zero config
deno run my-file.ts

No ts-node. No tsconfig tweaking. Just works.

Built-in Tooling

deno fmt          # Format code (like Prettier)
deno lint         # Lint code
deno test         # Run tests
deno check        # Type check
deno compile      # Single binary output

One tool. No tool chain configuration.

The Honest Assessment

Deno 2.0 is genuinely good now. For new projects, especially TypeScript-heavy ones: it's worth trying.

The reasons to choose Node over Deno are shrinking. The ecosystem compatibility story is mostly solved. The developer experience is actually better.

# Try it today
curl -fsSL https://deno.land/install.sh | sh
deno run https://deno.land/std/examples/welcome.ts