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npm hook library whose useInterval the post recommends, described as the ref-held-callback pattern plus null-to-pause, pause/resume controls, an immediate option, and StrictMode-safe cleanup.
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A dev.to walkthrough of React's useEventListener makes the case plainly: subscribe-once and call-the-newest-handler are incompatible deps, so the pattern moves the handler into a ref.
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Persisting wizard state in localStorage ships a cross-tab bleed. sessionStorage is scoped to one tab, which is the lifetime a payment redirect actually needs.
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An autosave button that reports "saved" while dropping the user's last three words is the same defect as a stale socket handler. The fix is a ref written in a layout effect.
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A dev.to walkthrough restates the oldest React timer bug: setInterval closes over one render. The durable fix is a ref-held callback keyed only on delay, an idea Dan Abramov published in 2019.
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