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npm run test
通过详细描述
1、由于css-before-loader添加的样式放置到head导致样式被收集,切换后反复添加
2、link 标签只应该处理 stylesheet ,其他资源不应该处理,导致被样式被收集
单例模式,渲染多次页面,style标签会每次都会追加一个 #161