解决vue 多级下拉框有空白页问题

getSelectionList () { //  获取下拉框内容
        var vm = this
        var url = 'localhost:8080/demo' + '/demo/selectList'
        var data = {}
        请求.postJson(vm, url, data, function (res) {
        vm.selectionList=vm.getTreeData(res.data)
        })
      },

getTreeData(data) {
        // 递归判断列表，把最后的children设为undefined
        for (var i = 0; i < data.length; i++) {
          if (data[i].children.length < 1) {
            // children若为空数组，则将children设为undefined
            data[i].children = undefined;
          } else {
            // children若不为空数组，则继续 递归调用 本方法
            this.getTreeData(data[i].children);
          }
        }
        return data;
      },

标签：vue,undefined,vm,下拉框,getTreeData,var,空白页,data,children
来源： https://www.cnblogs.com/idreamer/p/14660931.html