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Settable

The value passed to store.setState() and store.setStateDeep(), thus also the value passed to instance.setState() and instance.setStateDeep().

Definition​

type Settable<State = any> = ((state: State) => State) | State

Can be either the state straight-up or a function that receives the current state and returns the new state

const store = createStore(null, 'initial state')

store.setState('new state')
store.setState(currentState => `${currentState} and then some`)
store.getState() // 'new state and then some'