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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 ~然老臣年迈昏聩，恐有负陛下所托，违旨抗命，盖不愿阻塞后进报国之路也。Yellow: turmeric, pomegranate, goldthread* …老家伙，就不能让朕吃一顿安生的庆功宴吗？********下章下午五点。还有，今儿听人说起那个从西南来的林聪，儿子觉得，他只怕就是小葱也不一定哩。