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For example, if we want to implement a JS function, Such as form validation, Then if we don't use the policy pattern in javascript described in the previous chapter to solve the form validation encapsulation code, It is a temporary form validation function written by itself. Certainly without any encapsulation, Then at this time, we will pop up a prompt to the user for whether the two values are equal. If there is a form verification on another page, their judgment method and business logic are basically the same, but the comparison parameters are different. Should we consider writing a form verification code again? So now we can consider using the template method pattern to solve this problem. Common methods are extracted, and different methods are implemented by specific subclasses. This design code also has the advantages of stronger scalability and better code ~Next, the compilation process of JS suffix is described in detail. The actual steps Node.js completes in the process of compiling js files are to wrap the contents of js files head and tail. Take app.js as an example, the wrapped app.js will become the following form:该剧讲述了俞秀莲为报家仇独身上京，在途中却屡次被仇家所害幸得李慕白多次相救并在他的帮助下报仇雪恨的故事。小黛丝想着这些，止不住笑容满面，看得乾元殿中上至皇帝，下至太监，都浑身恶寒。(4) There is no infectious disease, and I and my family have no history of mental illness.黄观忙起身谢方夫人惦记，方智和方威也问候了一遍。松重丰饰演的主人公井之头五郎，借工作之便在出差地周边的美食店驻足，自由享用想吃的美食并度过自在时光。《孤独的美食家 第五季》就是这样的一档美食纪录片。