React is becoming a black box

Re:React is becoming a black box by sydd on Thursday September 03, 2020 @04:23PM (#24368468)

and what happens if I unmount and remount it? something like:

<div> {isLoggedIn ? <LogoutButton /> : abcd } </div>

and I change the value of isLoggedIn. Does the state reset? I'm not asking for a solution, just pointing out that even a 'simple' hook like useState has its small quirks.

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Re:React is becoming a black box by acemarke on Thursday September 03, 2020 @04:37PM (#24368603)

It does reset, because toggling that flag will unmount the old instance of the component, and then mount a new instance.

This is the same behavior as has always existed with class components and `this.setState()`. Component-scoped state only exists as long as that specific instance of the component is mounted.

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