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    JavaScript (JS) is a lightweight, interpreted (or just-in-time compiled) programming language with first-class functions. It is widely known as the scripting language for web pages, but it is also used in many non-browser environments such as Node.js, Apache CouchDB, and Adobe Acrobat. JavaScript is a prototype-based, multi-paradigm, single-threaded, dynamic language that supports object-oriented, imperative, and declarative (e.g., functional programming) styles.

    Key Features of JavaScript

    1. Versatility: JavaScript can be used to develop websites, games, mobile apps, and more.

    2. Client and Server-Side: With frameworks like Node.js and Express.js, JavaScript is now used for building server-side applications.

    3. End-to-End Solutions: JavaScript enables developers to create complete solutions for various problems.

    4. Constant Evolution: JavaScript continually evolves with new features and standards.

    5. Vibrant Community: A large community of users and mentors actively contributes to JavaScript’s growth.

    What is JavaScript fundamentals?
    JavaScript fundamentals JavaScript is a huge topic, with so many different features, styles, and techniques to learn, and so many APIs and tools built on top of it. This module focuses mostly on the essentials of the core language, plus some key surrounding topics — learning these topics will give you a solid basis to work from. What is JavaScript?
    developer.mozilla.org
    GeeksForGeeks
    https://www.geeksforgeeks.org/javascript/javascript-basics
    JavaScript Basics - GeeksforGeeks
  1. W3School
    https://www.w3schools.com › Js

    JavaScript Tutorial - W3Schools

    JavaScript is easy to learn. This tutorial covers everything from basic JavaScript up to the latest 2026 version. Start learning JavaScript now » With our Try it Yourself editor, you can edit the source code …

    • ECMAScript 2015, also known as ES6, introduced JavaScript Classes. …

    • JavaScript is the Language The DOM API is a standard for how to get, change, add, or …

    • JavaScript Comparison Operators Comparison operators are used to …

    • W3Schools offers free online tutorials, references and exercises in all the major …

    • To understand this, you have to understand the term "hoisting". Hoisting is …

    • An Array is an object type designed for storing data collections. Key …

    • The W3Schools Tryit Editor lets you experiment with JavaScript code and …

    • A JavaScript variable can hold 8 types of data. 7 Primitive Data Types and 1 Object …

    • The else Statement Use the else statement to specify a block of code to be executed …

    • JavaScript Arithmetic Operators Arithmetic operators perform arithmetic on numbers …

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  2. GeeksForGeeks
    https://www.geeksforgeeks.org › javascript › javascript-basics

    JavaScript Basics - GeeksforGeeks

    Aug 21, 2025 · JavaScript is a versatile, lightweight scripting language widely used in web development. It can be utilized for both client-side and server-side development, making it essential for modern web …

  3. The Modern JavaScript Tutorial
    https://javascript.info

    The Modern JavaScript Tutorial

    2 days ago · Here we learn JavaScript, starting from scratch and go on to advanced concepts like OOP. We concentrate on the language itself here, with the …

  4. Mozilla Developer
    https://developer.mozilla.org › en-US › curriculum › ...

    6. JavaScript fundamentals - MDN Web Docs

    JavaScript is a huge topic, with so many different features, styles, and techniques to learn, and so many APIs and tools built on top of it. This module focuses mostly on the essentials of the core language, …

  5. JavaScript Tutorial
    https://www.javascripttutorial.net

    JavaScript Tutorial

    JavaScript Tutorial provides you with many practical tutorials that help you learn JavaScript from scratch quickly and effectively.

  6. FreeCodecamp
    https://www.freecodecamp.org › news › learn-javascript...

    Learn JavaScript for Beginners – JS Basics Handbook

    Jul 6, 2023 · The goal of this handbook is to quickly introduce you to the basics of JavaScript so you can start programming applications. Instead of covering all the …

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  8. TutorialsPoint
    https://www.tutorialspoint.com › javascript

    JavaScript Tutorial - Online Tutorials Library

    This JavaScript tutorial has been designed for beginners as well as working professionals to help them understand the basic to advanced concepts and …

  9. Codecademy
    https://www.codecademy.com › learn › introduction-to-java

    Learn JavaScript - Codecademy

    Learn how to use JavaScript — a powerful and flexible programming language for adding website interactivity. You interact with JavaScript code all the time — you …

  10. Guru99
    https://www.guru99.com › interactive-javascript-tutorials.html

    JavaScript Tutorial for Beginners – Guru99

    Feb 16, 2026 · Javascript Tutorial for Beginners help you learn JavaScript step by step. You will learn all the JavaScript basic to advanced level in this guide.

  11. javascript-tutorial.com
    http://javascript-tutorial.com

    Start - The complete JavaScript Tutorial

    Hello and welcome to this JavaScript tutorial, primarily intended for new users of this exciting and popular programming language. More advanced users might learn a thing or two as well, by reading …

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  13. Deep dive into Basic Tutorial About JavaScript

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