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Setting and Persisting Color Scheme Preferences with CSS and a “Touch” of JavaScript — Done via a combo of prefers-color-scheme, :has(), and JavaScript localStorage.

Making Sense of 'Senseless' JavaScript Features — We’ve tackled with (above), now Juan Diego Rodriguez looks at several other seemingly “absurd” JS eccentricities, explains how they came into existence, and tries to help you avoid the problems they cause.