Responsive Design

Responsive design ensures that a single website works well across the full range of devices users might have. Instead of building separate mobile and desktop versions, responsive design uses flexible grids, fluid images, and CSS media queries to adjust the layout based on the available screen space. A navigation bar might display horizontally on desktop but collapse into a hamburger menu on mobile.

AI code generation tools generally produce responsive layouts using modern CSS frameworks like Tailwind CSS. The generated code often looks great at common breakpoints but can have issues at intermediate sizes, on very small screens, or when content length varies. Long text might overflow containers, buttons might become too small to tap on mobile, or modal dialogs might extend beyond the screen edge.

Testing responsive design requires checking the application at multiple screen sizes, not just the standard desktop and mobile breakpoints. DidItWork testers evaluate applications across real devices and screen sizes, catching responsive issues that only appear under specific conditions. This is especially valuable for vibecoded apps where the developer may have only tested in their own browser window.