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> the class is newly instantiated each time a render is going on

No, it's not? Where do you think the state goes, if the instance doesn't hold it?

It's stored internally in React. The instance of your component does not hold the state, just a reference to the state object which is repopulated each render (just like useState, it's the exact same mechanism), and after the render is done, the instance is destroyed.

More here: https://reactjs.org/blog/2015/12/18/react-components-element...

The instance of the class isn’t destroyed every render... you can keep other state on it too that is persisted between renders, changing it just won’t trigger a render.

You are right. I tried it here, for others: https://codesandbox.io/s/crazy-bush-cg2i0?file=/src/App.js

Sure that is the way it works now. Is that a guarantee of React though or implicit behavior that could change in the future?

It's just an implementation detail.

I don’t know how this library or React work, but you could pass the state as an argument to itself - then what GP said makes sense.

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