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Picture this: a live dashboard that polls for new notifications every 3 seconds. The count increments in state, the UI updates, everything looks right — except the interval callback is silently reading count = 0 on every tick, because it…
AdminJuly 31, 20266 min read
Open a modal 10 times without cleanup and you've got 10 stacked timers silently draining memory. Here's what this looks like in a PR and how senior devs catch it.
AdminJuly 31, 20266 min read