Live Interactive Demo Model
Custom `useMediaQuery` & Responsive Layout Hook
A responsive breakpoint inspector displaying active screen tiers (Mobile, Tablet, Desktop, 4K) in real time.
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React 19 Practice Workbench
Acceptance Criteria
Using matchMedia(query).addEventListener('change', handler)
Syncing initial match values on mount to prevent layout shifts
Switching rendering components dynamically based on breakpoint booleans
Target APIs & Concepts
window.matchMediaMediaQueryList EventListenerResponsive State
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