JavaScript Tutorial
What is JavaScript?
Table of Contents
- Introduction
- What is JavaScript?
- History of JavaScript
- Versions of JavaScript
- Basic Structure of JavaScript
- Uses and Applications of JavaScript
- Key Features of JavaScript
- What Makes JavaScript Unique?
- Advantages and Limitations of JavaScript
- JavaScript vs Java
- How Does JavaScript Work?
- Why Learn JavaScript?
- Career in JavaScript
FAQs about JavaScript
No, JavaScript and Java are entirely different languages with distinct use cases.
Yes, tools like React Native and Ionic enable mobile app development.
JavaScript adds interactivity and dynamic behavior to websites. It enables tasks like real-time updates, form validation, animations, and API integration.
Yes, its syntax and vast learning resources make it an ideal first language.
Closures are functions that retain access to their parent scope even after the parent function has executed.
Through Promises, async/await, and the event loop.
var: Function-scoped and hoisted.
let: Block-scoped and not hoisted.
const: Block-scoped and immutable.
Frameworks like React, Angular, and Vue.js are pre-written collections of JavaScript code that simplify and accelerate the development of web applications.
Popular tools- include Visual Studio Code, npm, Webpack, and debugging tools in browsers.
ECMAScript (ES) is the standard that defines JavaScript. Updates to ECMAScript (e.g., ES6, ES7) introduce new features and improvements to JavaScript.
JavaScript can run in:
Browsers (e.g., Chrome, Firefox, Safari) for front-end development.
Node.js for back-end server-side applications.
JavaScript is interpreted, but modern engines like Google’s V8 use just-in-time (JIT) compilation to improve performance.
Yes, frameworks like React Native and Ionic allow developers to build cross-platform mobile apps using JavaScript.
The Document Object Model (DOM) is a structured representation of a webpage’s content. JavaScript interacts with the DOM to dynamically update, add, or remove elements.
