Intro to Deno

What is Deno?

• Pronounced “Den-o” or “Deen-o”
  • Logo is a dinosaur 🦕
• A new runtime for JavaScript/TypeScript
  • Supports TS out-of-the-box
• “Secure by default”
  • Permissions based
• Built-in utilities
  • Dependency inspection, formatting, etc.
  • Standard modules
  • From the creator of Node.js
    • Created as its successor

Comparing Node and Deno

Node

• V8-based runtime
• C++
• Callback-based API
• De facto centralized module repository (npmjs.com)
• package.json
• node_modules/

Deno

• V8-based runtime
• Rust
• Top-level async
• “De-centralized” module repository (github.com)
• deps.ts
• Local cache

Demo

Repo: https://github.com/SeanMcP/node-v-deno

Summary

• Deno is a neat project with serious potential
• Opportunity to improve on Node.js
• Security is one of its defining features
• Ready option for utilities and personal projects
• Success depends on adoption