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What is JavaScript?

Javascript Interview Questions and Answers

Short Answer

JavaScript is a high-level, interpreted programming language that conforms to the ECMAScript specification. It is widely used for client-side web development.

Detailed Answer

JavaScript is a versatile scripting language used to enhance web pages and provide dynamic functionality.

It was originally developed by Brendan Eich of Netscape Communications under the name Mocha, then LiveScript, and finally renamed to JavaScript.

JavaScript is primarily used for creating interactive web pages and building web applications.

It is an essential part of web browsers and enables enhanced user interfaces and dynamic websites.

JavaScript code can be inserted into any HTML page and executed by all modern web browsers.

It supports object-oriented, imperative, and declarative programming styles.

JavaScript can interact with HTML, allowing developers to manipulate page elements and handle user events.

It is often used alongside HTML and CSS to create responsive and interactive websites.

JavaScript can be run on any platform that has a compatible browser, making it a widely used programming language.

It has a large ecosystem of libraries and frameworks, such as React, Angular, and Vue.js, which simplify web development tasks.

JavaScript is continually evolving, with new features and improvements being added regularly.

It is supported by all major web browsers, including Chrome, Firefox, Safari, and Edge.

JavaScript has both client-side and server-side implementations, with Node.js being a popular server-side runtime environment.

Overall, JavaScript is a powerful and flexible language that is essential for modern web development.