Compatibility with loadSidebar true

[matttrice]

Issue

If using the _sidebar.md option with loadSidebar: true mermaid charts do not render in demo.

Steps to reproduce

1. clone repo docsify-mermaid-zoom
2. add loadSidebar: true, to demo/index.html in the window.$docsify object
3. run docsify serve demo (or vite)
4. observe mermaid blocks do not render; plain text shows instead
   • refresh the page and the issue goes away consistently on my use of the plugin. Refresh does not fix the demo and I don't know why

Same occurs with loadNavbar and _navbar.md