Type alias SetStateAction<S>

The instruction passed to a Dispatch function in useState to tell React what the next value of the useState should be.

Often found wrapped in Dispatch.

Example

// This return type correctly represents the type of
// `setCount` in the example below.
const useCustomState = (): Dispatch<SetStateAction<number>> => {
  const [count, setCount] = useState(0);

  return setCount;
}
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