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                            ## DOM怎樣添加、移除、移動、復制、創建和查找節點
（1）創建新節點

createDocumentFragment()????//創建一個DOM片段

createElement()???//創建一個具體的元素

createTextNode()???//創建一個文本節點

（2）添加、移除、替換、插入、克隆

appendChild()

removeChild()

replaceChild()

insertBefore()  
cloneNode()

（3）查找

getElementsByTagName()????//通過標簽名稱

getElementsByName()????//通過元素的Name屬性的值

getElementById()????//通過元素Id，唯一性
                    
                
        
                
            
        
                
    
                
    
                
        
                
    
                

                







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