关于javascript:js-工具函数构造递归菜单组件

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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