JS makes a floating layer effect pop up when the mouse passes over the text

This time I will bring you JS to make a special effect of a floating layer popping up when the mouse passes over text. What are the precautions for making a special effect of popping up a floating layer when the mouse passes over text with JS? Here is a practical case, let's take a look.

For example, the CSDN notification (should be the bell at the top of the page after entering the page to write a new article), what is the specific implementation? The above code:

    
     警告消息  
 
 
 
 编号5005车辆发车间隔异常 
 
 
 
 
 编号5005车辆发车间隔异常 
 
 
 
 
 编号5005车辆发车间隔异常 
 
 
 
 
 编号5005车辆发车间隔异常 
 
 
 
 
 编号5005车辆发车间隔异常 
 
 
 
 
 编号5005车辆发车间隔异常 
 
 
 
 
 编号5005车辆发车间隔异常 
 
 
 
 
 编号5005车辆发车间隔异常 
 
 
 
 
  

The rendering is as follows:

I believe you have mastered the method after reading the case in this article. For more exciting information, please pay attention to other related matters on the PHP Chinese website article!

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