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Code as above; You can see, There are obvious shortcomings, For example, when I click on an element, I need to create a div. I click on the second element to create a div again, We frequently click on such and such elements, and they will frequently create div elements. Although we can remove pop-up codes when we click Close, it is not good for us to frequently create and delete them, especially for performance, and frequent operations on DOM will cause redrawing, etc., thus affecting performance. Therefore, this is a very bad habit. We can now use the monomer mode to realize the pop-up effect. We can instantiate it only once. The following code:忽然。However, there are other software developers who, when designing programs, always name classes with similar patterns, such as so-and-so Facade, so-and-so Factory, etc. In fact, the contents of the classes have nothing to do with the design patterns at all, but are only used to flaunt that they understand the design patterns.收入翻倍是什么概念？原来月收入为五千，现在只要来到星海，月收入立刻就能变成一万。李聚福相貌平平，成绩中等，和发小于家傲一起在高中过着无忧无虑普普通通的生活。直到转学生林无忌的出现，给李聚福带来了人生的转机，他发现不仅林无忌有着考上大学参加科研的梦想，就连于家傲都有着成为动画导演的梦想。在二人的帮助下，李聚福开始了自己坎坷但又欢乐的寻梦之旅。The front of the package is marked with a large "GL" logo, the abbreviation of GEAR LAB.Silent Witness follows the work of forensic pathologist Dr. Sam Ryan, played by Amanda Burton. The series was created by an ex-police officer, Nigel McCrery - who has also published five Silent Witness novels based on the series