关于javascript:js-工具函数构造递归菜单组件1

mysql 表里这种构造

咱们理论想要的是树型构造

间接上代码

buildMenuTree: function (arr, res = []) {for (let i = 0; i < arr.length; i++) {if(arr[i].type === '0') {arr[i].children = []
     for (let j = 0; j < arr.length; j++) {if (arr[i].id === +arr[j].parentId) {arr[i]['children'].push(arr[j])
       }
     }
     if(arr[i].children.length>0) {res.push(arr[i])
     }else {delete arr[i].children
       res.push(arr[i])
     }
   }
  }
  return res
}

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