The idea that JavaScript closures are defined as event handlers is one of the most subtle and powerful parts of Node.js, and is a key to Node’s asynchronous non-blocking architecture.

Node.js uses Google's V8 JavaScript engine from Chrome to run and execute JavaScript code outside the browser. SEE: Hiring Kit: Python developer (TechRepublic Premium) ...

Developed by Node.js creator Ryan Dahl (notice Deno is an anagram of Node), Deno is an attempt to reimagine Node to leverage the advances in JavaScript since 2009, including the TypeScript compiler.