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经历了两个冒险事件的吴邪从南沙回到杭州后，在修养期间，突然接到了久未谋面的发小老痒的电话。老痒和吴邪讲述了自己三年前在秦岭山腹地的冒险见闻，并邀请吴邪一同前去冒险，再探上古遗迹。吴邪和老痒出发前往了秦岭山脉探险，在这里，他们见到了巨大的哲罗鲑、壮丽的地下河瀑布、不可思议的上古神树…而一直神出鬼没的张起灵，竟也在暗中帮助着吴邪。退一步说，他们最会避敌锋芒，主力往哪个方向追，他们便朝哪个方向退，同时四散包围，一旦他们觉得合适了，就会出击。In fact, employees, experiences and students describe a role, for example, a person who is a "manager" must be an "employee". In the above design, a person cannot have multiple roles at the same time, and if he is an "employee", he can no longer be a "student". This is obviously unreasonable, because many on-the-job graduate students, even employees, are students.During the process, the participants shall not interfere with the competition of other teams. Otherwise, the competition will be disqualified.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.又转向玉米，玉米，你有没有？有的话就送给弟弟玩。Tip: There are very few M codes for channel goods. L medium tube is suitable for 42 ~ 46, long tube is not suitable for friends below 180, unless you want to become Uncle Drew.