jQuery UI is a user interface library that provides interactions, effects, widgets, and themes built on top of jQuery.
jQuery UI addresses the need for ready-made interactive components and visual effects in web applications. It offers a curated collection of widgets such as date pickers, sliders, and dialogs, along with interaction patterns and theming capabilities. Developers can use these components individually or combine them to build highly interactive web applications without building UI elements from scratch.
jQuery UI suits projects that already depend on jQuery and need standard UI components with established APIs and broad browser support. It works well for applications requiring traditional widgets like date pickers, accordions, tabs, and draggable elements. The project is appropriate for teams maintaining legacy applications or those preferring a stable, well-documented library over modern frameworks.
The project is in maintenance-only mode. Development activity is limited to bug fixes and critical updates rather than new features. The team maintains the codebase through pull requests following established coding standards and commit message guidelines, with discussion occurring in dedicated forums and IRC channels. Unit tests are run manually across browsers to ensure compatibility.