zustand/system/vanilla.development.js

🐻 Bear necessities for state management in React

System.register([], (function (exports) {
  'use strict';
  return {
    execute: (function () {

      const createStoreImpl = (createState) => {
        let state;
        const listeners = /* @__PURE__ */ new Set();
        const setState = (partial, replace) => {
          const nextState = typeof partial === "function" ? partial(state) : partial;
          if (nextState !== state) {
            const previousState = state;
            state = replace ? nextState : Object.assign({}, state, nextState);
            listeners.forEach((listener) => listener(state, previousState));
          }
        };
        const getState = () => state;
        const subscribe = (listener) => {
          listeners.add(listener);
          return () => listeners.delete(listener);
        };
        const destroy = () => listeners.clear();
        const api = { setState, getState, subscribe, destroy };
        state = createState(
          setState,
          getState,
          api
        );
        return api;
      };
      const createStore = exports('default', (createState) => createState ? createStoreImpl(createState) : createStoreImpl);

    })
  };
}));