text: var __extends = (this && this.__extends) || (function () {
      var extendStatics = function (d, b) {
          extendStatics = Object.setPrototypeOf ||
              ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
              function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; };
          return extendStatics(d, b);
      }
      return function (d, b) {
          extendStatics(d, b);
          function __() { this.constructor = d; }
          d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
      };
  })();
  var __generator = (this && this.__generator) || function (thisArg, body) {
      var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g;
      return g = { next: verb(0), "throw": verb(1), "return": verb(2) }, typeof Symbol === "function" && (g[Symbol.iterator] = function() { return this; }), g;
      function verb(n) { return function (v) { return step([n, v]); }; }
      function step(op) {
          if (f) throw new TypeError("Generator is already executing.");
          while (_) try {
              if (f = 1, y && (t = op[0] & 2 ? y["return"] : op[0] ? y["throw"] || ((t = y["return"]) && t.call(y), 0) : y.next) && !(t = t.call(y, op[1])).done) return t;
              if (y = 0, t) op = [op[0] & 2, t.value];
              switch (op[0]) {
                  case 0: case 1: t = op; break;
                  case 4: _.label++; return { value: op[1], done: false };
                  case 5: _.label++; y = op[1]; op = [0]; continue;
                  case 7: op = _.ops.pop(); _.trys.pop(); continue;
                  default:
                      if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) { _ = 0; continue; }
                      if (op[0] === 3 && (!t || (op[1] > t[0] && op[1] < t[3]))) { _.label = op[1]; break; }
                      if (op[0] === 6 && _.label < t[1]) { _.label = t[1]; t = op; break; }
                      if (t && _.label < t[2]) { _.label = t[2]; _.ops.push(op); break; }
                      if (t[2]) _.ops.pop();
                      _.trys.pop(); continue;
              }
              op = body.call(thisArg, _);
          } catch (e) { op = [6, e]; y = 0; } finally { f = t = 0; }
          if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true };
      }
  };
  /* rx-queue version 0.4.30 */
  (function (global, factory) {
      typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports, require('rxjs'), require('rxjs/operators')) :
          typeof define === 'function' && define.amd ? define(['exports', 'rxjs', 'rxjs/operators'], factory) :
              (factory((global.window = {}), global.rxjs, global.operators));
  }(this, (function (exports, rxjs, operators) {
      'use strict';
      var version = "0.4.30";
      var VERSION = version;
      // default set to 500 milliseconds
      var DEFAULT_PERIOD_TIME = 500;
      // https://codepen.io/maindg/pen/xRwGvL
      var RxQueue = /** @class */ (function (_super) {
          __extends(RxQueue, _super);
          function RxQueue(period) {
              if (period === void 0) { period = DEFAULT_PERIOD_TIME; }
              var _this = _super.call(this) || this;
              _this.period = period;
              _this.itemList = [];
              return _this;
          }
          RxQueue.prototype.next = function (item) {
              if (this.observers.length > 0) {
                  _super.prototype.next.call(this, item);
              }
              else {
                  this.itemList.push(item);
              }
          };
          RxQueue.prototype.subscribe = function (nextOrObserver, error, complete) {
              var _this = this;
              var subscription; // TypeScript strict require strong typing differenciation
              if (typeof nextOrObserver === 'function') {
                  subscription = _super.prototype.subscribe.call(this, nextOrObserver, error, complete);
              }
              else {
                  subscription = _super.prototype.subscribe.call(this, nextOrObserver);
              }
              this.itemList.forEach(function (item) { return _this.next(item); });
              this.itemList = [];
              return subscription;
          };
          RxQueue.prototype.version = function () {
              return VERSION;
          };
          return RxQueue;
      }(rxjs.Subject));
      /**
       * DebounceQueue drops a item if there's another one comes in a period of time.
       *
       * T: item type
       */
      var DebounceQueue = /** @class */ (function (_super) {
          __extends(DebounceQueue, _super);
          /**
           *
           * @param period milliseconds
           */
          function DebounceQueue(period) {
              var _this = _super.call(this, period) || this;
              _this.subject = new rxjs.Subject();
              _this.subscription = _this.subject.pipe(operators.debounce(function () { return rxjs.interval(_this.period); }))
                  .subscribe(function (item) { return _super.prototype.next.call(_this, item); });
              return _this;
          }
          DebounceQueue.prototype.next = function (item) {
              this.subject.next(item);
          };
          DebounceQueue.prototype.unsubscribe = function () {
              this.subscription.unsubscribe();
              _super.prototype.unsubscribe.call(this);
          };
          return DebounceQueue;
      }(RxQueue));
      /**
       * DelayQueue passes all the items and add delays between items.
       * T: item type
       */
      var DelayQueue = /** @class */ (function (_super) {
          __extends(DelayQueue, _super);
          /**
           *
           * @param period milliseconds
           */
          function DelayQueue(period) {
              var _this = _super.call(this, period) || this;
              _this.subject = new rxjs.Subject();
              _this.subscription = _this.subject.pipe(operators.concatMap(function (args) { return rxjs.concat(rxjs.of(args), // emit first item right away
              rxjs.EMPTY.pipe(operators.delay(_this.period))); })).subscribe(function (item) { return _super.prototype.next.call(_this, item); });
              return _this;
          }
          DelayQueue.prototype.next = function (item) {
              this.subject.next(item);
          };
          DelayQueue.prototype.unsubscribe = function () {
              this.subscription.unsubscribe();
              _super.prototype.unsubscribe.call(this);
          };
          return DelayQueue;
      }(RxQueue));
      var __awaiter = (undefined && undefined.__awaiter) || function (thisArg, _arguments, P, generator) {
          return new (P || (P = Promise))(function (resolve, reject) {
              function fulfilled(value) { try {
                  step(generator.next(value));
              }
              catch (e) {
                  reject(e);
              } }
              function rejected(value) { try {
                  step(generator["throw"](value));
              }
              catch (e) {
                  reject(e);
              } }
              function step(result) { result.done ? resolve(result.value) : new P(function (resolve) { resolve(result.value); }).then(fulfilled, rejected); }
              step((generator = generator.apply(thisArg, _arguments || [])).next());
          });
      };
      /**
       * DelayQueueExector calls functions one by one with a delay time period between calls.
       */
      var DelayQueueExector = /** @class */ (function (_super) {
          __extends(DelayQueueExector, _super);
          /**
           *
           * @param period milliseconds
           */
          function DelayQueueExector(period) {
              var _this = _super.call(this, period) || this;
              _this.delayQueueSubscription = _this.subscribe(function (unit) {
                  try {
                      var ret = unit.fn();
                      return unit.resolve(ret);
                  }
                  catch (e) {
                      return unit.reject(e);
                  }
              });
              return _this;
          }
          DelayQueueExector.prototype.execute = function (fn, name) {
              return __awaiter(this, void 0, void 0, function () {
                  var _this = this;
                  return __generator(this, function (_a) {
                      return [2 /*return*/, new Promise(function (resolve, reject) {
                              var unit = {
                                  fn: fn,
                                  name: name || fn.name,
                                  reject: reject,
                                  resolve: resolve,
                              };
                              _this.next(unit);
                          })];
                  });
              });
          };
          DelayQueueExector.prototype.unsubscribe = function () {
              this.delayQueueSubscription.unsubscribe();
              _super.prototype.unsubscribe.call(this);
          };
          return DelayQueueExector;
      }(DelayQueue));
      /**
       * ThrottleQueue
       *
       * passes one item and then drop all the following items in a period of time.
       *
       * T: item type
       */
      var ThrottleQueue = /** @class */ (function (_super) {
          __extends(ThrottleQueue, _super);
          /**
           *
           * @param period milliseconds
           */
          function ThrottleQueue(period) {
              var _this = _super.call(this, period) || this;
              _this.subject = new rxjs.Subject();
              _this.subscription = _this.subject.pipe(operators.throttle(function (_) { return rxjs.interval(_this.period); })).subscribe(function (item) { return _super.prototype.next.call(_this, item); });
              return _this;
          }
          ThrottleQueue.prototype.next = function (item) {
              this.subject.next(item);
          };
          ThrottleQueue.prototype.unsubscribe = function () {
              this.subscription.unsubscribe();
              _super.prototype.unsubscribe.call(this);
          };
          return ThrottleQueue;
      }(RxQueue));
      exports.DebounceQueue = DebounceQueue;
      exports.DelayQueue = DelayQueue;
      exports.DelayQueueExector = DelayQueueExector;
      exports.RxQueue = RxQueue;
      exports.ThrottleQueue = ThrottleQueue;
      Object.defineProperty(exports, '__esModule', { value: true });
  })));
  /* https://github.com/zixia */
  //# sourceMappingURL=rx-queue.es6.umd.js.map
  