How to use JavaScript to achieve the left menu effect

This article mainly introduces the JavaScript implementation of the left menu effect in detail. It has certain reference value. Interested friends can refer to it.

The example in this article shares with you the js implementation of the left menu. The specific code for menu effect display is for your reference. The specific content is as follows

The amount of code I have learned so far is a bit large, and future learning will make it simpler

      
  
 
 
 
菜单1
 
 
内容1
 
内容1
 
内容1
 
 
 
 
菜单2
 
 
内容2
 
内容2
 
内容2
 
 
 
 
菜单3
 
 
内容3
 
内容3
 
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菜单4
 
 
内容4
 
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The effect is like this:

After clicking on any menu, it will look like this:

The above is what I compiled for everyone. I hope it will be better in the future. Helpful to everyone.

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