25 lines
1001 B
JavaScript
25 lines
1001 B
JavaScript
const createStoreImpl = (createState) => {
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let state;
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const listeners = /* @__PURE__ */ new Set();
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const setState = (partial, replace) => {
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const nextState = typeof partial === "function" ? partial(state) : partial;
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if (!Object.is(nextState, state)) {
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const previousState = state;
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state = (replace != null ? replace : typeof nextState !== "object" || nextState === null) ? nextState : Object.assign({}, state, nextState);
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listeners.forEach((listener) => listener(state, previousState));
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}
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};
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const getState = () => state;
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const getInitialState = () => initialState;
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const subscribe = (listener) => {
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listeners.add(listener);
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return () => listeners.delete(listener);
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};
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const api = { setState, getState, getInitialState, subscribe };
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const initialState = state = createState(setState, getState, api);
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return api;
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};
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const createStore = ((createState) => createState ? createStoreImpl(createState) : createStoreImpl);
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export { createStore };
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