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                            ## Flexbox彈性盒式模型
Flex = flex(ible) layout box model

> 它能夠更加高效方便控制元素對齊、排列，更重要的是能夠自動計算布局內元素的尺寸，無論這個元素的尺寸是固定的還是動態的。
> 

### flexbos布局圖
![flexbox布局基本結構、組成](https://box.kancloud.cn/cb07f11c602ce6ea1a177f7f97a5f476_1453x627.jpg)


1. 父容器 flex container，子元素 flex item
2. 主軸 main axis，交叉軸 cross axis
3. 主軸的起點main start，主軸終點main end，交叉軸起點cross start，交叉軸終點 cross end


> 不一定主軸就是x方向，交叉軸就是y方向，哪根是主軸是通過屬性設置的


                    
                
        
                
            
        
                
    
                
    
                
        
                
    
                

                







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