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Zhang LiangyingAmong them, global.js is the encapsulation code of the global-publish subscription mode object that we encapsulated above.************医馆一间病房内，葫芦迷蒙间，听得秦淼痛哭，想要劝她，说自己没伤那么严重，可是嘴眼都无法张开。嗯，请到诸先生回去之后，立即着手此事，刻不容缓。欢迎广大书友光临阅读，最新、最快、最火的连载作品尽在。Another expression of the minimum knowledge principle is to communicate only with direct friends. As long as there is a coupling relationship between classes, it is called a friend relationship. Coupling is divided into dependency, association, aggregation, combination, etc. We call classes that appear as member variables, method parameters, and method return values direct friends. Local variables and temporary variables are not direct friends. We require unfamiliar classes not to appear in the class as local variables.Responsibility chain mode-A request needs multiple objects to process, thus avoiding the coupling relationship between the sender and receiver of the request. Connect these objects into a chain and pass the request along this chain until an object processes it. The specific structure diagram is as follows: