Front-End Code: HTML, CSS, JavaScript, and any frameworks (React, Vue, Angular, etc.) used for the website or web app’s interface.
Back-End Code: Server-side code (Node.js, Python, PHP, etc.), databases, and APIs needed for functionality.
Responsive Design: Ensures the web app works seamlessly across devices (desktops, tablets, and smartphones).
Cross-Browser Compatibility: Testing and ensuring the app works across all major web browsers (Chrome, Firefox, Safari, Edge, etc.).