Java Script

The JavaScript language

JavaScript  often abbreviated as JS, is a programming language that conforms to the ECMAScript specification. JavaScript is high-level, often just-in-time compiled, and multi-paradigm. It has curly-bracket syntaxdynamic typingprototype-based object-orientation, and first-class functions.

Alongside HTML and CSS, JavaScript is one of the core technologies of the World Wide Web. JavaScript enables interactive web pages and is an essential part of web applications. The vast majority of websites use it for client-side page behavior, and all major web browsers have a dedicated JavaScript engine to execute it.

As a multi-paradigm language, JavaScript supports event-drivenfunctional, and imperative programming styles. It has application programming interfaces (APIs) for working with text, dates, regular expressions, standard data structures, and the Document Object Model (DOM). However, the language itself does not include any input/output (I/O), such as networkingstorage, or graphics facilities, as the host environment (usually a web browser) provides those APIs.

JavaScript engines were originally used only in web browsers, but they are now embedded in server-side website deployments, usually via Node.js. They are also embedded in a variety of applications created with frameworks such as Electron and Cordova.

Although there are similarities between JavaScript and Java, including language name, syntax, and respective standard libraries, the two languages are distinct and differ greatly in design.

Here we learn JavaScript, starting from scratch and go on to advanced concepts like OOP.

We concentrate on the language itself here, with the minimum of environment-specific notes.An introduction

JavaScript Fundamentals

Code quality

Objects: the basics

Data types

Advanced working with functions

Object properties configuration

Prototypes, inheritance


Error handling

Promises, async/await

Generators, advanced iteration




Browser: Document, Events, Interfaces

Learning how to manage the browser page: add elements, manipulate their size and position, dynamically create interfaces and interact with the visitor.Document

Introduction to Events

UI Events

Forms, controls

Document and resource loading



Additional articles

List of extra topics that assume you’ve covered the first two parts of tutorial. There is no clear hierarchy here, you can read articles in the order you want.Frames and windows

Binary data, files

Network requests

Storing data in the browser


Web components

Regular expressions