html 模板

    
        
     
1
        
     
2
        
     
            
      
a
            
      
b
        
     
        
     
            
      
x
            
      
y
            
      
                
       asd            
      
        
     
    
    

js

let l = console.log        let box = document.querySelector('.box')        let toArray = Array.from;        scan(box)        function scan(box) {            let arr = toArray(box.children)            for (let ele of arr) {                if (ele.children.length) {                   scan(ele)                }else{                    l( ele)                }            }        }