NameThatUI - Diagnostic tool for identifying web UI patterns

Show HN: NameThatUI – A quiz game to test your UI design knowledge

NameThatUI is a free, browser-based diagnostic tool designed to help developers and designers accurately identify unnamed UI elements. Instead of relying on vague visual labels, users describe observable behaviors to receive a precise pattern match and a testable implementation brief. The platform covers 39 distinct web UI patterns, from Tooltips to Modals, clarifying critical differences in focus, keyboard support, and mobile behavior. With no account required, it serves as an essential reference for ensuring correct interaction contracts before handing off specs to coding agents or building components.