js 递归遍历对象 插入属性 遍历树结构

 // 向 info下面 每一项 插入 isShow
  test() {
      const _this = this;
      _this.info.isShow = false;
      let iteration = function(arr) {
        let newArr = [];
        if (arr != undefined && arr.length > 0) {
          newArr = arr.map(item => {
            item.isShow = false;
            if (item.children != undefined && item.children.length > 0) {
              iteration(item.children);
            }
            return item;
          });
        }
        return newArr;
      };
      _this.info.children = iteration(_this.info.children);
    },

// 封装  点击得每个结点的id   和该结点的位置
extendKey(json, nodeId, bol) {
      var arr = json.map(item => {
        if (item.id == nodeId) {
          item.isShow = bol;
        } else if (item.mate && item.mate.id == nodeId) {
          item.isShow = bol;
        } else {
          if (item.children) {
            this.extendKey(item.children, nodeId, bol);
          }
        }
        return item;
      });
      return arr;
    },