The sidebar navigation supports collapsible chapters for nested content.
Chapters with sub-items can be expanded or collapsed by clicking the arrow icon.
# Summary
* [Introduction](README.md)
* [Chapter 1](chapter1/README.md)
* [Section 1.1](chapter1/section1.md)
* [Section 1.2](chapter1/section2.md)
* [Chapter 2](chapter2.md)
In this example, "Chapter 1" will have an expand/collapse arrow.
The sidebar state is saved in localStorage, so expanded/collapsed chapters persist across page reloads.
{
"plugins": ["-collapsible-chapters"]
}