Tailwind CSS font-bold Class

The Tailwind CSS font-bold utility applies font-weight: 700; to an element when added to its class attribute. It sets the font weight to 700, the standard bold weight. The most commonly used emphasis weight for headings, buttons, and strong text.

This utility is part of Tailwind's Typography module, designed for styling text with appropriate sizes, weights, spacing, alignment, and decorations. In Tailwind's utility-first workflow, you add font-bold 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:font-bold, md:font-bold, lg:font-bold, and xl:font-bold, allowing different behavior at each breakpoint. State variants like hover:font-bold and focus:font-bold 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 `font-semibold`, `font-extrabold`, `font-medium`, `font-normal` 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.