控制台警告：
[Violation] Added non-passive event listener to a scroll-blocking 'mousewheel' event. Consider marking event handler as 'passive' to make the page more responsive. See https://www.chromestatus.com/feature/5745543795965952
[Violation] Added non-passive event listener to a scroll-blocking 'wheel' event. Consider marking event handler as 'passive' to make the page more responsive. See https://www.chromestatus.com/feature/5745543795965952
警告原因：
我是用的mongodb驱动版本号是4.4.26，通过 mongod --version 查看。警告信息表示正在使用的mongodb驱动程序版本已经不再支持 useNewUrlParser 和 useUnifiedTopology 选项。这在4.0.0版本之后已经被弃用了。我多此一举加了这两个选项，直接删除重新连接即可解决警告
标签：passive,non,Added,blocking,listener,event From： https://www.cnblogs.com/sharenotes/p/18232741