Poking at the CSS if() Function a Little More: Conditional Color Theming | CSS-Tricks
Briefly

The recent introduction of the if() CSS function in Chrome 137 marks a significant advance in styling capabilities, allowing developers to conditionally assign property values based on CSS variable states. This function promises to enhance theming options beyond simple light and dark modes. Detailed analysis reveals that condition checks with if() must utilize custom property values, and concerns over syntax clarity remain. Despite these obstacles, the potential applications of if() in design systems are vast, suggesting an exciting future for dynamic web styling.
The new if() CSS function allows for conditional value assignments based on CSS variables, expanding theming possibilities beyond traditional light-dark alternatives.
While the syntax of if() is complex, it offers significant potential for dynamic styling solutions in modern web design.
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