@naverpay/vanilla-store/dist/esm/select.mjs

  

import { applyPersist } from "./applyOptions.mjs";
import { shallowEqual } from "./shallowEqual.mjs";
const createVanillaSelect = (store, selectFn, equalityFn = shallowEqual, options) => {
  const callbacks = /* @__PURE__ */ new Set();
  let state = selectFn(store.get());
  const get = () => {
    const persistValue = store.persistStore?.value;
    const currentValue = persistValue && !shallowEqual(persistValue, store.get()) ? persistValue : store.get();
    const next = selectFn(currentValue);
    if (!equalityFn(next, state)) {
      state = next;
      return next;
    }
    return state;
  };
  let persistStore = null;
  const addCallbacks = () => callbacks.add(() => {
    if (persistStore) {
      persistStore.value = get();
    }
  });
  persistStore = applyPersist(options, addCallbacks, selectFn(store.get()));
  const subscribe = (callback) => {
    callbacks.add(callback);
    const unsubscribeOriginalStore = store.subscribe(() => {
      const next = selectFn(store.get());
      if (!equalityFn(next, state)) {
        state = next;
        callback();
      }
    });
    return () => {
      callbacks.delete(callback);
      unsubscribeOriginalStore();
    };
  };
  const set = () => {
    callbacks.forEach((callback) => callback());
  };
  return {
    get,
    set,
    subscribe,
    persistStore
  };
};
export {
  createVanillaSelect
};