hexo next主题空白，本地无法预览

hexo之前配的好好的，运行环境是win10，一个月不用再打开，本地预览和github pages全是空白打不开，很方。试过重启，更新升级，hexo clean + hexo g重新生成都不行，后来发现端口被福昕占用了改端口也不行。最后终于找到原因了：
用于DNS加速服务的jsdelivr寄了

powershell查看4000端口占用情况

> netstat -aon|findstr "4000"
TCP    127.0.0.1:4000         0.0.0.0:0              LISTENING       5028

表中的第二列是本地地址，最后一列是程序的PID。从中我们可以看出占用4000端口的程序PID是5028。进一步查看PID为“5028”的是哪个进程或者程序

> tasklist|findstr "5028"
FoxitProtect.exe              5028 Services                   0     13,632 K

基本都是福昕啦。所以就换个端口呗，可以命令行直接加参数

> hexo s -p 5000 # 端口改为5000

或者修改_config.yml文件，添加如下设置

server:
  port: 5000
  compress: true
  header: true

之后就正常hexo s就可以打开5000端口。

查看_config.next.yml文件的vendors设置，把插件从jsdelivr改成cdnjs

# ---------------------------------------------------------------
# CDN Settings
# See: https://theme-next.js.org/docs/advanced-settings/vendors
# ---------------------------------------------------------------

vendors:
  # The CDN provider of NexT internal scripts.
  # Available values: local | jsdelivr | unpkg | cdnjs | custom
  # Warning: If you are using the latest master branch of NexT, please set `internal: local`
  internal: local
  # The default CDN provider of third-party plugins.
  # Available values: local | jsdelivr | unpkg | cdnjs | custom
  # Dependencies for `plugins: local`: https://github.com/next-theme/plugins
  plugins: cdnjs #jsdelivr
  # Custom CDN URL
  # For example:
  # custom_cdn_url: https://cdn.jsdelivr.net/npm/${npm_name}@${version}/${minified}
  # custom_cdn_url: https://cdnjs.cloudflare.com/ajax/libs/${cdnjs_name}/${version}/${cdnjs_file}
  custom_cdn_url:

本地就可以预览了，github pages就重新部署一下吧。

https://segmentfault.com/q/1010000008546859
https://www.jianshu.com/p/d3963da3946f
https://blog.csdn.net/qq_35760825/article/details/124862679
https://theme-next.js.org/docs/advanced-settings/vendors.html?highlight=cdn