在基于 Element-ui 写项目的时候,Chrome 提醒:
[Violation] Added non-passive event listener to a scroll-blocking ‘mousewheel’ event. Consider marking event handler as ‘passive’ to make the page more responsive.

翻译过来如下:
违反:没有添加被动事件监听器来阻止’touchstart’事件,请考虑添加事件管理者’passive’,以使页面更加流畅。
原因是 Chrome51 版本以后,Chrome 增加了新的事件捕获机制-Passive Event Listeners;
Passive Event Listeners:就是告诉前页面内的事件监听器内部是否会调用preventDefault函数来阻止事件的默认行为,以便浏览器根据这个信息更好地做出决策来优化页面性能。当属性passive的值为true的时候,代表该监听器内部不会调用preventDefault函数来阻止默认滑动行为,Chrome浏览器称这类型的监听器为被动(passive)监听器。目前Chrome主要利用该特性来优化页面的滑动性能,所以Passive Event Listeners特性当前仅支持mousewheel/touch相关事件。
解决:
1.npm i default-passive-events -S
2.main.js中加入:import ‘default-passive-events’
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