31 lines
549 B
JavaScript
31 lines
549 B
JavaScript
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export default function create (initialState) {
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let state = initialState
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const listeners = []
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function setState (partial) {
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state = { ...state, ...partial }
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for (let i = 0; i < listeners.length; i++) {
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listeners[i]()
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}
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}
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function getState () {
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return state
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}
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function subscribe (listener) {
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listeners.push(listener)
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return function unsubscribe () {
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const index = listeners.indexOf(listener)
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listeners.splice(index, 1)
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}
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}
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return {
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setState,
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getState,
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subscribe,
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}
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}
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