1. //封装深拷贝
  2.     copyAry(options) {
  3.       return this.copy(options);
  4.     },
  5.     copy(ary) {
  6.       let newAry = [];
  7.       for (const item of ary) {
  8.         let value = item;
  9.         if (Object.prototype.toString.call(value) === "[object Object]")
  10.           value = this.copyObj(value);
  11.         if (Object.prototype.toString.call(value) === "[object Array]")
  12.           value = this.copyAry(value);
  13.         newAry.push(value);
  14.       }
  15.       return newAry;
  16.     },
  18.     copyObj(obj) {
  19.       let newObj = {};
  20.       for (const key in obj) {
  21.         let value = obj[key];
  22.         if (Object.prototype.toString.call(value) === "[object Object]")
  23.           value = this.copyObj(value);
  24.         if (Object.prototype.toString.call(value) === "[object Array]")
  25.           value = this.copyAry(value);
  26.         newObj[key] = value;
  27.       }
  28.       return newObj;
  29.     },

封装获取对象层数

  1. getMaxFloor(treeData, num) {
  2.       let level = 0;
  3.       let v = this;
  4.       let maxLevel = 0;
  5.       function loop(data, level) {
  6.         data.forEach((item) => {
  7.           item.level = level;
  8.           if (level > maxLevel) {
  9.             maxLevel = level;
  10.           }
  11.           if ("children" in item) {
  12.             if (item.children.length > 0) {
  13.               loop(item.children, level + 1);
  14.             }
  15.           }
  16.         });
  17.       }
  18.       loop(treeData, 1);
  19.       this.power = maxLevel; //菜单层级数赋值
  20.       console.log(this.power)
  21.     },

注意：也可以使用json转换的格式进行深拷贝、

let a = JSON.parse(JSON.stringify(b))