Overview #

This talk will introduce you to Deno, its features, and how it compares to Node.js. Then we'll illustrate some of those differences in a live demo.

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


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


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


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


  • 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