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What is JavaScript and what is it used for

Discover what JavaScript is, how it adds interactivity to a website and why it is one of the most important technologies in modern development.

Published: 28/06/2026Updated: 28/06/2026

Introduction

JavaScript is a programming language widely used on the web. It allows a page to do dynamic things such as validate forms, change content on screen or respond to user actions.

Conclusion

JavaScript is one of the key building blocks of modern web development because it powers the interactive side of websites and applications.