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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 ~　　夺心游戏即将拉开序幕，谁会先掉入对方的爱情陷进？谁都不肯向谁让步，因为这是一场以心为赌注的战斗！大哥，你放心，我一定好好练。人们可以从最远30公里的距离看到它们：就像一座咕哝、冒泡的火山，准备喷发，一朵发光的云从地球升起。这就是人们在日出时体验维多利亚瀑布的方式。当地人称之为：“雷声烟”。尤其是在旱季，一场不寻常的迁徙开始了：大象家族从 100 公里外的万基国家公园来到这里。然后发生了一个奇妙而非常罕见的奇观：他们游过赞比西河，就好像他们是一串巨大的珍珠。