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CSS Optimization: Is Using Declarations Just Once (UDJO) Still Effective Today?

Summary by CSS-Tricks
Is the technique inspired by the DRY principle by identifying and reducing (if not eliminating) CSS declaration repetition still a relevant optimization strategy? CSS Optimization: Is Using Declarations Just Once (UDJO) Still Effective Today? originally handwritten and published with love on CSS-Tricks. You should really get the newsletter as well.
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CSS-Tricks broke the news on Tuesday, November 10, 2026.
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