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The above is just a synchronous chain of responsibilities, We let each node function return a specific value "nextSuccessor" synchronously, To indicate whether to pass the request to the next node, we will often encounter AJAX asynchronous requests in our development. After the request is successful, we need to do something so-and-so. At this time, if we apply the above synchronous request again, it will not take effect. Let's understand and use asynchronous responsibility chain to solve this problem. We add another prototype method Chain.prototype.next to the Chain class to manually pass the request to the next node in the responsibility chain.少女面前风光无限，传说动人的震泽，而非彭蠡泽。七千人随着一泻千里的洪水，乘风破浪。《神探夏洛克》的主创们将以全新视角为您演绎出世界上最著名的吸血鬼：华丽、阴郁、邪魅危险的德古拉伯爵…小鱼儿大步离开，花无缺带着一脸复杂、思绪万千的铁心兰也离开了。According to the memory of Liu Guangyuan, a soldier who personally participated in the battle that year: