What Is React JS? A Beginner's Guide to Core Concepts

What React Is and Why It's Popular

React JS is an open-source JavaScript library used to build user interfaces for websites and applications. Developed at Meta, React helps developers create interactive screens using reusable pieces of code called components.

Unlike traditional approaches, where developers may manually update different parts of a webpage, React helps manage how the interface changes when information is updated.

React is popular because it offers several advantages:

• Reusable components: Build interface elements once and use them across different pages.
• Efficient updates: React updates the necessary parts of an interface when data changes.
• Easy maintenance: Component-based code makes large applications easier to manage.
• Strong community: Developers have access to extensive documentation, libraries, and learning resources.

React is commonly used for e-commerce websites, business dashboards, customer portals, and web applications.