What Makes React a Single Page Application?

Why React is Called a Single Page Application (SPA) In simple words, a Single Page Application (SPA) means a website that loads only one HTML page and updates content without reloading the whole page. How React Works React uses a concept called the Virtual DOM. Instead of reloading the entire page, React updates only the part of the UI that changes. Example: You click a button Only that section updates The page does NOT reload This makes the app fast and smooth. Why React is an SPA 1. Only One HTML Page React apps usually have a single index.html file. All other content is loaded dynamically using JavaScript. 2. No Full Page Reload In traditional websites: Every click → new page loads In React: Click → content updates inside the same page 3. Uses Client-Side Routing React uses libraries like react-router-dom. Instead of going to a new page: URL changes Component changes Page stays the same 4. Faster Performance Because React updates only required parts: Less loading time Better user ex