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`useState`

useState<T>(init?: () => T | Ref<T>): Ref<T>
useState<T>(key: string, init?: () => T | Ref<T>): Ref<T>

key: A unique key ensuring that data fetching is properly de-duplicated across requests. If you do not provide a key, then a key that is unique to the file and line number of the instance of useState will be generated for you.
init: A function that provides initial value for the state when not initiated. This function can also return a Ref.
T: (typescript only) Specify the type of state

::ReadMore{link="/guide/features/state-management"} ::