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