<!-- IMPORTANT: Please use the following link to create a new issue: https://new-issue.vuejs.org/ If your issue was not created using the app above, it will be closed immediately. 中文用户请注意: 请使用上面的链接来创建新的 issue。如果不是用上述工具创建的 issue 会被自动关闭。 --> <!-- Love vuejs? Please consider supporting us via Patreon or OpenCollective: 👉 https://www.patreon.com/evanyou 👉 https://opencollective.com/vuejs/donate --> 使用keep-alive 结合router-view 实现页面缓存时,给router-view 添加key,在keep-alive使用include。include内容为key数组,想通过这种方式实现同个页面多份缓存的功能,但是include功能不能生效,到底是什么原因呢?   