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After changing page by route, warning appears when countdown time is up. #23

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ustcsy opened this issue Dec 30, 2019 · 0 comments
Open

After changing page by route, warning appears when countdown time is up. #23

ustcsy opened this issue Dec 30, 2019 · 0 comments

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@ustcsy
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ustcsy commented Dec 30, 2019

Warning: Can't perform a React state update on an unmounted component. This is a no-op, but it indicates a memory leak in your application. To fix, cancel all subscriptions and asynchronous tasks in the componentWillUnmount method.
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