1.

What Is Wrong With This Code?

Answer»

RETURN {
streak: prevState.streak + props.count
}
})

NOTHING is wrong with it 🙂. It’s rarely USED and not well known, but you can also pass a function to setState that receives the previous state and props and RETURNS a new state, just as we’re doing above. And not only is nothing wrong with it, but it’s also actively recommended if you’re SETTING state based on previous state.

return {
streak: prevState.streak + props.count
}
})

Nothing is wrong with it 🙂. It’s rarely used and not well known, but you can also pass a function to setState that receives the previous state and props and returns a new state, just as we’re doing above. And not only is nothing wrong with it, but it’s also actively recommended if you’re setting state based on previous state.


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