[bug] hexo-material@1.4.0 菜单栏报错

[a1ooha]

I certify that I have first consulted (check all with "x")

我确认我已经查看了 (使用 "x" 选择)

• [x] Hexo documentation | Hexo 文档
• [x] Material theme documentation | Material 主题文档
• [ ] Material theme issues | Material 主题的其它 issue

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I'm submitting a (check one with "x")

我正在申请 (使用 "x" 选择)

• [x] bug report | 反馈一个 bug
• [ ] feature request | 申请添加新的特性或功能
• [ ] support request | 请求技术支持

hexo-material@1.4.0 鼠标移出弹出菜单时报错 报错如下

[neoFelhz]

440 #416