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Second, the main differences between the two are as follows:However, for large-scale project development or framework design, it is obviously better to organize code with design patterns.“警察什么的，我要辞职了！”说道：这是我刚刚看到的一个帖子。在这个弹药充足，潜藏着不法威胁的小镇里，海姆斯沃斯将演绎经典西部英雄比尔·希科克与他的枪战传奇。For example, I now need to create a div element on the page. Then we definitely need a function to create the div, Now all I need is this function, which is only responsible for creating div elements. It doesn't want to take care of the rest, That is, to realize the principle of single responsibility, Just like Kissy on Taobao, At the beginning, they defined Kissy to do only one thing and did it well. The specific instantiation class in the monomer mode was handled by the agent function. The advantage of doing so was that the specific business logic was separated. The agent only cared about the business logic of the agent. Here, the function of the agent was to instantiate the object and instantiate it only once. Create div code just create div, the others don't care; The following code: