watermark-js-plus/dist/ie/es/node_modules/core-js/internals/queue.js

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var queue;
var hasRequiredQueue;

function requireQueue () {
	if (hasRequiredQueue) return queue;
	hasRequiredQueue = 1;
	var Queue = function () {
	  this.head = null;
	  this.tail = null;
	};

	Queue.prototype = {
	  add: function (item) {
	    var entry = { item: item, next: null };
	    var tail = this.tail;
	    if (tail) tail.next = entry;
	    else this.head = entry;
	    this.tail = entry;
	  },
	  get: function () {
	    var entry = this.head;
	    if (entry) {
	      var next = this.head = entry.next;
	      if (next === null) this.tail = null;
	      return entry.item;
	    }
	  }
	};

	queue = Queue;
	return queue;
}

export { requireQueue as __require };