CSS :is() and :where() are coming to browsers

ime Vidas with the lowdown on what these pseudo-selectors are and why they will be useful:

• :is() is to reduce repetition of parts of comma-separated selectors.
• :where() is the same, but nothing inside it affects specificity. The example of wrapping :where(:not()) is really great, as now there is a way to use :not() without bumping up the selector weight in a way you very likely don’t want.

1. This is something that CSS preprocessors are good at (via nesting). Another

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