Resizable Sidebar

[sophiakanoa]

I am hoping to make my sidebar resizable by having a divider that the user can drag to make the sidebar larger or smaller. Are there any ideas on ways to swizzle and create this?
I am hoping for a sidebar like the one in this sandbox: https://codesandbox.io/p/sandbox/react-resizable-sidebar-kz9de?file=%2Fsrc%2Findex.js%3A8%2C15

[Advait251206]

I think the cleanest way to achieve a resizable sidebar in Docusaurus is to wrap the sidebar and main layout in a split-pane style container and then control the sidebar width via React state.

A simple approach is:

• Store sidebar width in state (e.g. useState(250)).
• Add a vertical draggable divider between sidebar and content.
• Update width dynamically on mousemove.
• Persist value in localStorage if you want it to survive reloads.

If you're using swizzling, you can override @docusaurus/theme-classic layout and inject a resizable wrapper around the main layout component.

A minimal idea looks like:

• Attach onMouseDown to the divider
• Track dragging with window.addEventListener('mousemove')
• Clamp width between min/max values
• Remove listener on mouseup

Libraries like react-resizable or re-resizable can also simplify this a lot and save you from manually handling drag logic.

If you want behavior similar to the CodeSandbox you linked, using a library is usually the most stable option because it handles edge cases like selection dragging, touch support, and window resize automatically.

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GitHub: https://github.com/Advait251206