NodeJS Runtime

ECMAscript

It is a scripting language spec which defines the core features and implementation of a scripting language.

JS is a implementation of ECMAscript standard.

NodeJS

It is an open-source, cross-platform JavaScript runtime environment.

It is built on Chrome's V8 JS engine (there are other JS engines also like SpiderMonkey).

Bun is NodeJS competitor which is getting famous due to its scalability and efficiency.

HTTP Server

HTTP is a protocol defined on machines to communicate each other.

Most common way in which website frontend communicate with its backend.

HTTP Methods

HTTP defines a set of request methods to indicate the desired action to be performed for a given resource. Some commonly used are :

• GET

• POST

• PUT

• DELETE

HTTP Status Code

HTTP response status codes indicate whether a specific HTTP request has been successfully completed e.g.

• 200 - Everything is OK

• 404 - Route not found

• 403 - Authentication error

• 500 - Internal server error

HTTP Server in JS using Express

Express is a minimal and flexible NodeJS web application framework that provides a robust set of features for web and mobile applications.