SOURCE

const findParentNode = (arr, key, parent)=>{
      for (let i = 0; i < arr.length; i++) {
        if (arr[i].key === key) {
          // 找到正确的结果代表最后一层的返回值
          return parent
        }
        if (arr[i].children) {
         
          const target = findParentNode(arr[i].children, key, arr[i])
          if (target) {
             // 返回值给到上一层，以此类推,直到最顶层
            return target
          }
        }
      }
      return null
    }
    const arr=[{
         title: 'hyz', key: '0', 
         children:[{
              title: 'hyzson',
              key: '0-1',
              children:[{
                  title:'hyz’so’son',
                  key:'0-1-0'
              }]
        }]
        }] 
	let tarGet = findParentNode(arr,'0-1-0')
    console.log(tarGet)