The Changing Boundary Between CSS States and JavaScript Events
CSS-Tricks

EDITOR BRIEF
CSS has long used pseudo-classes to change styles based on user interaction. Newer features are making CSS feel more like it responds to events, which can overlap with what JavaScript usually handles.
INSIGHTS
This matters because beginners can often choose simpler CSS instead of JavaScript for some interactions. Try comparing pseudo-classes with JavaScript event listeners on a small UI to see which tool fits best.
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