SMRTR ProgrammingJun 29, 2026CSS-Tricks

The Shifting Line Between CSS States and JavaScript Events

SMRTR summary

CSS is quietly gaining pseudo-classes that mimic JavaScript event listeners — covering hover, focus, validation, media states, popovers, fullscreen, and more. The upcoming `event-trigger` spec takes this further by letting CSS animations respond directly to DOM events like clicks and keypresses, without any JavaScript at all.

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