解决办法:
pointer-events: none 表示鼠标事件“穿透”该元素并且指定该元素“下面”的任何东西
pointer-events: auto 鼠标不会穿透当前层
参考自:
https://segmentfault.com/a/1190000018484615
https://www.cnblogs.com/bing0709/archive/2004/01/13/10636517.html
https://developers.weixin.qq.com/community/develop/doc/8de05d636131d9e17b2e58409b01ec04
https://blog.csdn.net/elementFei/article/details/90081091
https://juejin.cn/post/6844903959665049614
Taro 简单的浮动按钮:https://developers.weixin.qq.com/community/develop/article/doc/000866caab8f80bee1b91ca3051413