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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:6. White BalanceII. Application Value of BIM Technology in ConstructionMDT team members should recognize the need for continuous learning;莫名的，周星河生出一股悲愤，他咬咬牙齿，沉声说道：是的，大家都说我不适合当一个演员，我根本不会成功。For example, many information platforms began to make short videos, jokes, constellations and novels. Because the traditional portal mode is very heavy, how much manpower can produce how much content is limited, and it cannot cover many subdivided points of interest, nor can it cover the needs of users.