Introduction to JavaScript
1. What is JavaScript?
JavaScript (commonly abbreviated as JS) is a high-level, interpreted
programming language that conforms to the ECMAScript specification.
It is a versatile, lightweight, and multi-paradigm language used primarily for
adding interactivity to web pages.
JavaScript is a client-side language (executed in the browser) but can also
be used on the server-side with environments like Node.js.
2. History and Evolution
Developed by Brendan Eich in 1995 during his time at Netscape
Communications.
Originally called Mocha, then renamed LiveScript, and finally JavaScript.
Standardized as ECMAScript (ES) by ECMA International, ensuring
compatibility across different environments.
Modern versions (ES6 and beyond) have introduced powerful features such
as modules, classes, and async programming.
3. Why Use JavaScript?
Interactivity: Enables dynamic content like form validation, animations, and
user interactions.
Ubiquity: Supported by all modern web browsers, making it essential for
web development.
Versatility: Works on the front-end (web browsers) and back-end (with
Node.js), allowing developers to use a single language across the stack.
4. Key Characteristics
Lightweight and Fast: Designed for quick execution with minimal overhead.
1. What is JavaScript?
JavaScript (commonly abbreviated as JS) is a high-level, interpreted
programming language that conforms to the ECMAScript specification.
It is a versatile, lightweight, and multi-paradigm language used primarily for
adding interactivity to web pages.
JavaScript is a client-side language (executed in the browser) but can also
be used on the server-side with environments like Node.js.
2. History and Evolution
Developed by Brendan Eich in 1995 during his time at Netscape
Communications.
Originally called Mocha, then renamed LiveScript, and finally JavaScript.
Standardized as ECMAScript (ES) by ECMA International, ensuring
compatibility across different environments.
Modern versions (ES6 and beyond) have introduced powerful features such
as modules, classes, and async programming.
3. Why Use JavaScript?
Interactivity: Enables dynamic content like form validation, animations, and
user interactions.
Ubiquity: Supported by all modern web browsers, making it essential for
web development.
Versatility: Works on the front-end (web browsers) and back-end (with
Node.js), allowing developers to use a single language across the stack.
4. Key Characteristics
Lightweight and Fast: Designed for quick execution with minimal overhead.
