Does Styled Components have a runtime cost?
Classic Styled Components has a runtime cost because it generates styles in the browser. Zero-runtime CSS-in-JS solutions exist that compile at build time, removing the cost, but they have some feature trade-offs.
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More FAQs in Tailwind vs Styled Components vs CSS Modules for React
It depends on your priorities. Tailwind for speed and tiny CSS, Styled Components for highly dynamic prop-driven styling, and CSS Modules for plain scoped CSS with no runtime. There is no single best.
Tailwind uses utility classes in the markup. Styled Components writes actual CSS inside template literals in components. Tailwind is faster and ships tinier CSS; Styled Components is better for dynamic, prop-driven styling.
Locally scoped CSS files where class names are unique by default. You write plain CSS in a separate file, and the styles are scoped to the component, with no runtime cost.
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