storry/index.js

State Management made simple

(function (global, factory) {
  if (typeof define === "function" && define.amd) {
    define(["module", "exports"], factory);
  } else if (typeof exports !== "undefined") {
    factory(module, exports);
  } else {
    var mod = {
      exports: {}
    };
    factory(mod, mod.exports);
    global.storry = mod.exports;
  }
})(this, function (module, exports) {
  "use strict";

  Object.defineProperty(exports, "__esModule", {
    value: true
  });

  exports.default = function () {
    var _state = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};

    var listeners = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : [];
    return {
      state: function state() {
        return _state;
      },
      action: function action(transform) {
        return function (event) {
          _state = transform(_state, event);
          listeners.forEach(function (listener) {
            return listener(_state);
          });
        };
      },
      listen: function listen(callback) {
        return listeners.push(callback);
      }
    };
  };

  module.exports = exports["default"];
});