How to save the state when unmount-e?

Question

JavaScript

Here is a good example: https://codesandbox.io/s/cool-roentgen-6pk1u
Change the state. Next, click on unmount. Why does the state remain initial after unmout, and how to save it?

Answer 1

Why does the state remain initial after unmout

Because this is the local state of the component

and how to save it?

1. in the parent component
2. in the global store like redax
3. in localStorage