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我的笔记本上使用的分辨率不太高,document.body.offsetWidth 只有 1275px。所以在往 control bar 添加按钮后显示会有问题:


于是我为 control bar 添加了滚动功能
鼠标滚动已经经过测试。但我手上没有平板,没办法测试触摸操作,希望能帮忙测试一下。
也可以考虑,把这个东西独立成一个组件。分辨率不大的用户自行安装;毕竟添加了几个监听事件,还是有些性能成本的。