Tailwind CSS resize-y Class

The Tailwind CSS resize-y utility applies resize: vertical; to an element when added to its class attribute. It allows the user to resize the element only vertically. Common for textareas and content areas where only height adjustment is appropriate.

This utility is part of Tailwind's Interactivity module, designed for controlling user interaction behaviors such as cursors, text selection, resizing, and scrolling. In Tailwind's utility-first workflow, you add resize-y directly to your HTML elements rather than writing custom CSS. This approach accelerates development and keeps styles co-located with your markup, making it easy to see exactly how each element is styled at a glance.

Common responsive variants include sm:resize-y, md:resize-y, lg:resize-y, and xl:resize-y, allowing different behavior at each breakpoint. State variants like hover:resize-y and focus:resize-y enable interactive styling without any JavaScript. You can also combine multiple variants for fine-grained control over when the utility applies.

This class works well alongside `resize`, `resize-none`, `resize-x`, `overflow-auto` to build complete, production-ready interfaces. Tailwind's tree-shaking ensures only utilities you actually use appear in your final CSS bundle, keeping file sizes minimal. Browser support for the underlying CSS is excellent across Chrome, Firefox, Safari, and Edge.