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                            ## **思路：主要是改class**

>[info]本人是后端，前端不咋的，主要就是學新框架總結替特點，方便記憶。如 bootstrap在使用層面上，我覺得主要就是改class的值

``` html
class="active"?    <!--默認選中-->
class="badge"      <!--徽章-->
class="caret"      <!--右下角小箭頭-->
```
                    
                
        
                
            
        
                
    
                
    
                
        
                
    
                

                







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