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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:For those who want to improve their thinking ability, it is a shortcut to exercise their classification ability. When you can classify things effectively, you will find that complicated things are not complicated but can be very simple, and most of the problems without ideas and methods are actually known to you. However, this kind of exercise is not easy and requires hard work and training.素谨哭道：明心到处找你，找不到……明心慌忙道：对对对。今天见到你之后，我才发觉自己是错的，依兰是对的，越国将来大有成就。布鲁克林最大公立高中的五名学生为了成功、生存、挣脱枷锁并抓住未来而奋斗。与此同时，他们还要应对一个混乱的世界。西行取经人唐僧与孙悟空在渡人和降妖孰难孰易的问题上发生了争执，孙悟空使用移形换影大法把自己的法力给了唐僧，而自己变成了学识渊博却毫无法力的帅哥。移形换影大法只得维持七日，两个人便以七日为限，分别去渡化盘丝洞的蜘蛛七恶女和降服黄花观的百目魔君.........