Sung and e1cb4's answer has explained all my opinion 👏
these are purpose:
the function at return statement is called when the component is unmounted, so event handler is keeped active during the component is being mounted.
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Sung and e1cb4's answer has explained all my opinion 👏
these are purpose:
the function at return statement is called when the component is unmounted, so event handler is keeped active during the component is being mounted.