JS相关问题，从静态转换为动态

JS相关问题

一开始是静态实现的：

        this.$refs.treeMenuRef1.style.display = "none";
        this.$refs.treeMenuRef2.style.display = "none";
        this.$refs.treeMenuRef3.style.display = "none";
        this.$refs.treeMenuRef4.style.display = "none";
        this.$refs.treeMenuRef5.style.display = "none";
        this.$refs.treeMenuRef6.style.display = "none";

现在想实现动态，但是会报错：

Uncaught TypeError: Cannot read property 'style' of undefined

        for(a=1;a<=count;a++)
        {
          var x='treeMenuRef'+a;
          this.$refs.x.style.display = "none";
        }

请问我该如何做？

 for(a=1;a<=count;a++)
        {
          var x='treeMenuRef'+a;
          this.$refs[x].style.display = "none";
        }

可以用jquery试试，直接获取dom然后操作这个dom就可以了

this.$refs[x].style.display = "none";