JavaScript Runtimes

Deno

Deno is a modern, secure runtime for JavaScript and TypeScript, built on the V8 JavaScript engine and Rust. It provides built-in TypeScript support, a standard library, and a secure-by-default execution model that requires explicit permissions for file, network, and environment access. Deno aims to address limitations of Node.js by offering a more streamlined and secure development experience out of the box.

Also known as: Deno.js, Deno runtime, Deno platform, DenoJS, Deno TypeScript runtime

🧊Why learn Deno?

Developers should learn Deno when building server-side applications, scripts, or tools that prioritize security, TypeScript integration, and modern JavaScript features without complex configuration. It is particularly useful for projects requiring strict permission controls, such as microservices, CLIs, or applications handling sensitive data, as it eliminates many common security vulnerabilities by default. Deno also simplifies dependency management with URL-based imports and a built-in package manager.

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Learning Resources

Deno Crash Course on YouTube

Deno: The Complete Guide Zero to Mastery

Deno by Example

Official Deno Website

Related Tools

Javascript Typescript Node Js Rust V8 Engine

Alternatives to Deno

Node Js Bun Cloudflare Workers

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