Overlays
Overlays are a software design pattern where a transparent or semi-transparent layer is superimposed on top of an existing interface or content, typically to display additional information, controls, or interactive elements without permanently altering the underlying view. They are commonly used in user interfaces for modals, tooltips, pop-ups, and notifications to provide context or gather user input. This technique helps maintain a clean primary interface while offering on-demand functionality or feedback.
Developers should learn and use overlays when building interactive web or mobile applications that require temporary user interactions, such as displaying forms, alerts, or detailed information without navigating away from the current page. They are essential for enhancing user experience by reducing clutter, improving focus on specific tasks, and providing immediate feedback, making them ideal for features like login dialogs, image galleries, or error messages in modern UI/UX design.