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setState() callback #5

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GravityMsc opened this issue Jan 23, 2018 · 0 comments

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GravityMsc commented Jan 23, 2018 •

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In this issue, facebook/react#6320

setState callback fires after changes have been flushed to the DOM. Since they were never flushed, it was never called.

and it seems be true

The second (optional) parameter is a callback function that will be executed once setState is completed, even if the component is not re-rendered (e.g. when shouldComponentUpdate() returns false). However, if the component is unmounted before the callback is called, it won't be called later anymore. You can handle such situations in the componentWillUnmount() method.

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