[azangru]

While you do not need to understand how useState, or any other hooks work, you do need to know that this piece of code will behave differently from the rest of your javascript. Painfully, when the calling of (most of the) hooks is concerned, React takes away from the developer the ability to write conditional logic. This is both unintuitive and bonkers, and it requires the developer to come up with convoluted techniques for working around this limitation. This is part of what 'understanding of how hooks work' means.