js to achieve navigation ceiling effect

Without further ado, please take a look at the code:

        
   
 
 
1
 
2
 
3
 
4
 
5
 
6
 
7
 
8
 
9
 
10
 
 
  
 
1
 
2
 
3
 
  
 
11
 
13
 
14
 
21
 
22
 
23
 
 
 
21
 
22
 
23
 
21
 
22
 
23
 
21
 
22
 
23
 
21
 
22
 
23
 
21
 
22
 
23
 
21
 
22
 
23
 
21
 
22
 
23
 
21
 
22
 
23
 
 
 
31
 
32
 
33
 
21
 
22
 
23
 
31
 
32
 
33
 
21
 
22
 
23
 
31
 
32
 
33
 
21
 
22
 
23
 
31
 
32
 
33
 
21
 
22
 
23
 
31
 
32
 
33
 
21
 
22
 
23
 
31
 
32
 
33
 
21
 
22
 
23
 
    

The above is the entire content of this article. I hope that the content of this article can bring some help to everyone's study or work. I also hope that more people will support PHP Chinese. Net

For more articles related to JS implementation of navigation ceiling effect, please pay attention to the PHP Chinese website!