SOURCE

let reducer = function (state = {show: true, curtainState: false, time: 0, messageClose: false}, action){
  
  switch(action.type){
      case 'aaa':
   	    return {
                ...state,
                curtainState: action.value
            }
  }
  
}
/**
'use strict';

var _extends = Object.assign || function (target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i]; for (var key in source) { if (Object.prototype.hasOwnProperty.call(source, key)) { target[key] = source[key]; } } } return target; };

var reducer = function reducer() {
  var state = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : { show: true, curtainState: false, time: 0, messageClose: false };
  var action = arguments[1];


  switch (action.type) {
    case 'aaa':
      return _extends({}, state, {
        curtainState: action.value
      });
  }
};
**/