字面大概意思：在滚动阻止的“ mousewheel”事件中添加了非被动事件侦听器。 考虑将处理程序标记为“被动”以使页面更具响应性。
chrome 浏览器检测机制，给予指定属性冒事性能就更好。没法验证。
解决目的：强迫症晚期看不惯 debug 时候有任何的 warning....
解决方法：
npm i default-passive-events -S
或者
yarn add default-passive-events
安装之后在 main.js 内引入即可
element-ui遇到得坑一：Added non-passive event listener to a scroll-blocking 'mousewheel' event. Consider marking handler as 'passive' to make the page more responsive
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