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Questions about NodeJS? Read the FAQ

NodeJS Courses

Frequently asked questions about NodeJS

What is Node.js?

Node.js is a Javascript runtime for backend development (or Javascript that runs on servers). With Node.js, it’s possible to run Javascript code outside of a browser, allowing for a unified developer experience both in the backend and frontend. Additionally, you get access to sockets, databases, files, everything that is possible in any other general-purpose language, using the familiar ECMAScript syntax.

Node.js uses an event-driven non-blocking concurrency (IO) model to execute code, which means that it’s highly optimized for IO intensive operations while keeping the single-threaded paradigm already used in browser-based engines.

What is Node.js used for?

Node.js uses a single-threaded, event-driven, non-blocking IO model, making it lightweight and highly efficient for IO-intensive operations (for example, a REST API server).

Node.js can also be used to run ad-hoc (Javascript) scripts like any other general-purpose language.

How long does it take to learn Node.js?

Since Node.js is just a backend runtime for Javascript, if you have a good grasp of the language, you can use Node.js right away. If that’s not the case, then most of your time learning Node.js is actually learning Javascript and its ecosystem, which can take up to six months if you’re a total beginner.

What are the prerequisites for learning Node.js?

Node.js is just a runtime for Javascript, so knowledge of the language is required to learn how to use Node.js. You also have to understand the event-driven non-blocking IO model of the runtime as well as the difference among distinct ECMA module systems (Node.js currently only supports the CommonJS syntax).