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$cd blog/  # 走到博客根目录
$yarn add hexo-filter-mermaid-diagrams  # 安装mermaid插件
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# Mermaid tag
mermaid:
  enable: true
  # Available themes: default | dark | forest | neutral
  theme: forest
  cdn: //cdn.jsdelivr.net/npm/mermaid@8/dist/mermaid.min.js
  #cdn: //cdnjs.cloudflare.com/ajax/libs/mermaid/8.0.0/mermaid.min.js