Is Tailwind mobile-first?
Yes. A class without a prefix applies at all sizes. A prefixed class like md:flex applies at that breakpoint and up. So you write base mobile styles first, then add larger-screen styles with prefixes.
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More FAQs in Building Responsive React UIs With Tailwind CSS
Tailwind uses breakpoint prefixes like sm:, md:, lg:, and xl: to apply styles at different screen sizes. You write responsive styles inline in the className, without separate media query files.
Use prefixes on grid-cols. For example, grid-cols-1 md:grid-cols-3 shows one column on mobile and three on larger screens, all in one className with no media queries.
Use hidden md:block to hide on mobile and show on larger screens, or block md:hidden for the opposite. This is common for navigation toggles and elements that should only appear at certain sizes.
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