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                            既然知道了組件化的各種好處，接下來我們是不是應該關心下做成組件化它們又是相互獨立的，那它們要打電話怎么辦？

Vue的官方文檔說了：從內向外"events up" 和 從外向內“props down”。
                    
                
        
                
            
        
                
    
                
    
                
        
                
    
                

                







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