Which file within the public directory provides the entry point for the web app?

Which file within the public directory provides the entry point for the web app?

• A. service-worker.js
• B. index.html
• C. manifest.json
• D. robots.txt

Answer: (B)

The entry point is the HTML file the browser loads first to start the app. In a typical React setup, that’s the file named index.html in the public directory. It provides the root container (a div with an id like root) and loads the JavaScript bundle that boots up the React application. Once the bundle runs, React renders into that root element, effectively starting the app. The other files serve distinct roles: service-worker.js handles background tasks such as caching for offline use; manifest.json contains metadata for a Progressive Web App; robots.txt tells search engines which pages to crawl. They aren’t the starting point the browser loads to launch the app.

The entry point is the HTML file the browser loads first to start the app. In a typical React setup, that’s the file named index.html in the public directory. It provides the root container (a div with an id like root) and loads the JavaScript bundle that boots up the React application. Once the bundle runs, React renders into that root element, effectively starting the app.

The other files serve distinct roles: service-worker.js handles background tasks such as caching for offline use; manifest.json contains metadata for a Progressive Web App; robots.txt tells search engines which pages to crawl. They aren’t the starting point the browser loads to launch the app.