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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.只是外相，若是王家坚持……跟张家……在下是必定要去漠西的。小葱见娘脸色不好看，急忙跟弟弟解释，一桩事归一桩事，养成勤俭持家的好习惯，再穷也能发家。林虎是看了《白发魔女传》电视剧，才关注天启的，然后才开始看天启的武侠小说，再然后才看天启写的网络小说。韩信只是草草交待了几句，便着急着回王宫去了。谁知等属下带人赶去的时候，两个兄弟都死了，还有一人根本不见踪影。众人都笑。