Best for
Dev tools, code editors, file managers, or documentation sites that need an interactive nested file tree
Stack
A ready-made File Tree Sidebar UI you can fork, run, and customize with the prompt pack below.
What's actually inside
The honest engineer's breakdown — what the File Tree Sidebartemplate does, how it's wired, and where it's opinionated.
The File Tree Sidebar template is a self-contained recursive component system — no third-party tree library, no virtual DOM windowing, just React components calling themselves. FileTreeSidebar is the root container. TreeNode is the recursive component that renders either a folder (with an ExpandCollapseToggle and children) or a file (with an icon and click handler). The expand/collapse chevron rotates on open/close via a Tailwind CSS transition class. ActiveFileHighlight tracks which file the user has selected and applies an active background.
The template's most important design decision — and its main limitation — is that the tree data is static. It lives as a nested array or object in a constants file, not fetched from any backend. This is exactly right for a prototype or a demo, but if you need a real filesystem (reading from S3, Supabase Storage, or the server's disk), you will need to add an API route or Server Action. The advanced prompt below covers wiring to Supabase Storage.
Two engineering caveats: first, the recursive TreeNode approach will cause infinite render loops if you feed it circular data or forget to cap recursion depth — this is the most common crash and the fix is a maxDepth guard. Second, expand/collapse state stored in local useState per TreeNode resets whenever a parent re-renders. For any tree with more than a handful of nodes you will want to lift this state to a Map in the parent. Both fixes have ready prompts in the Gotchas section.
Key UI components
FileTreeSidebarRoot container rendering the recursive file tree structure with scroll handling
TreeNodeRecursive component rendering a file or folder with indentation, icons, and expand/collapse
FolderIcon / FileIconlucide-react icons differentiating folders from files in the tree
ExpandCollapseToggleChevron icon that rotates on open/close, animated via Tailwind transition
ActiveFileHighlightTracks the selected file and applies an active background style to the TreeNode
FileContextMenuRight-click context menu with rename, delete, and new file actions via shadcn/ui ContextMenu
ScrollAreashadcn/ui ScrollArea wrapping the tree for overflow handling in tall file structures
Libraries it leans on
shadcn/ui ContextMenushadcn/ui ScrollArealucide-reactFork it and get it running
This template takes about 10 minutes to fork and verify — the interactive tree state needs a real click-through in Preview before you can trust it is working.
Open the template and click Fork
Go to https://v0.dev/chat/community/NBfcFIKai4T and click 'Fork' to copy the template into your V0 workspace. The editor loads with the FileTreeSidebar visible in the Preview tab. You need a free V0 account.
You should see: The file tree template opens in the V0 editor with a sidebar showing a nested folder structure.
Test expand/collapse and active highlight in Preview
In the V0 Preview tab, click on folder nodes in the FileTreeSidebar to expand and collapse them. Confirm the ExpandCollapseToggle chevron rotates. Click a file node and confirm the ActiveFileHighlight background applies to the clicked item. Right-click a node to verify the FileContextMenu appears with rename/delete/new file options.
Tip: If the context menu does not appear, the shadcn/ui ContextMenu component may need to be installed — use 'Fix with v0' if this happens.
You should see: Folders expand and collapse; file clicks apply the active highlight; right-click shows the FileContextMenu.
Find the static tree data in the Code tab
Open the V0 Code tab and look for a constants file or an inline data structure — typically a nested array of objects with type ('file' | 'folder'), name, and children properties. This is what drives the entire tree. Understand this structure before you replace it with your own data, because the TreeNode component expects a specific shape.
Tip: Look for files named treeData.ts, constants.ts, or a data export inside the FileTreeSidebar file itself.
You should see: You can see the tree data structure and understand the object shape TreeNode expects.
Use Design Mode to adjust sidebar sizing
Press Option+D (Mac) to enter Design Mode. Click the FileTreeSidebar wrapper to adjust its width, font size, and colors to match your app's design system. This costs no credits. Adjust the active highlight color, the indentation depth, and the sidebar background color here.
You should see: FileTreeSidebar visual properties update in Preview to match your desired styling.
Publish to Vercel
Click the Share icon (top-right of the V0 editor), open the Publish tab, and click 'Publish to Production'. The build runs in 30–60 seconds. Open the live URL and verify the file tree is interactive — expand folders, click files, right-click for the context menu.
Tip: If @dnd-kit or any drag-and-drop library causes a build error, see the 'window is not defined' gotcha below before adding that feature.
You should see: The interactive file tree is live at a vercel.app URL.
Connect GitHub and replace the static tree data
Open the V0 Git panel and connect your GitHub account. V0 pushes the code to a branch named v0/main-{hash}. Clone the repo locally, open the constants file, and replace the static tree data with your real folder structure (or wire it to an API call). Push the changes — Vercel redeploys automatically.
Tip: If you need to fetch the tree data from an API, create a Server Component wrapper that fetches the data and passes it as a prop to the client-side FileTreeSidebar.
You should see: FileTreeSidebar renders your real folder structure from local data or an API response.
The prompt pack
Copy-paste these straight into v0's chat to customize the File Tree Sidebartemplate. Each one names this template's own components — no generic filler.
Replace static tree with a real folder structure
Replaces the sample tree data with a real project folder structure and adds file-extension-based icons to each TreeNode.
Replace the static file tree data in the constants file with this folder structure: /src (components/, pages/, lib/), /public (images/, fonts/), /styles (globals.css, tokens.css). Each folder should be expandable in FileTreeSidebar. Files should display extension-based icons using lucide-react: FileCode2 for .tsx and .ts files, FileJson for .json, FileText for .md, Image for .png and .jpg. Keep the ExpandCollapseToggle, ActiveFileHighlight, and FileContextMenu intact.
Add file extension icons per type
Makes each file in the tree display a relevant icon based on its extension, replacing the generic FileIcon.
Add file-type-specific icons to every FileIcon in the FileTreeSidebar. Extract the file extension from the filename (everything after the last dot). Use these lucide-react icons: FileCode2 for .tsx and .ts, FileJson for .json, FileText for .md and .mdx, Image for .png, .jpg, and .svg, File as the fallback for all other extensions. Pass the filename to TreeNode and select the correct icon component based on extension. Verify at lucide.dev that each icon name exists in the installed version before using it.
Add search/filter for the file tree
Adds a live search input above the tree that filters FileTreeSidebar to matching files while keeping their parent folders visible.
Add a search input above the FileTreeSidebar. As the user types into the input, filter the tree to show only files whose names contain the search string (case-insensitive). Keep parent folders visible for any matching file even if the folder name itself does not match. Clear the filter and restore the full tree when the input is empty. Use a controlled input with useState and implement the filter as a pure function over the tree data structure. Keep the ExpandCollapseToggle and ActiveFileHighlight behavior for visible nodes.
Add drag-and-drop reordering with @dnd-kit
Enables drag-and-drop file and folder reordering inside FileTreeSidebar using @dnd-kit, with an SSR-safe dynamic import.
Add drag-and-drop reordering to the FileTreeSidebar using @dnd-kit/core and @dnd-kit/sortable. Allow files to be dragged between folders. Show a drop indicator line between items when hovering over a valid drop target. Update the tree data state on drop using the @dnd-kit onDragEnd handler. Wrap the draggable FileTreeSidebar with next/dynamic(() => import('./DraggableTree'), { ssr: false }) to prevent 'window is not defined' SSR errors.Wire FileTreeSidebar to Supabase Storage
Replaces static tree data with live Supabase Storage contents, with delete support via FileContextMenu and RLS-gated access.
Replace the static file tree data with a dynamic tree fetched from Supabase Storage. List all objects in a Supabase bucket named 'user-files' using the Supabase Storage JS client (createClient with NEXT_PUBLIC_SUPABASE_URL and NEXT_PUBLIC_SUPABASE_ANON_KEY from the Vars panel). Parse the returned object paths (e.g. 'docs/getting-started.md') into a nested tree structure matching the shape TreeNode expects. Render a loading skeleton (shadcn/ui Skeleton) in FileTreeSidebar while fetching. Add a Server Action triggered by the 'Delete' FileContextMenu option that calls supabase.storage.from('user-files').remove([path]) and refreshes the tree. Add RLS: users can only access files where the path starts with their user ID.Gotchas when you extend it
The failures people actually hit when they push this template past its defaults — and the exact fix for each.
Deeply nested tree causes infinite render loopWhy: The recursive TreeNode component calls itself for each child. If the tree data has circular references or if maxDepth is not enforced, the component renders indefinitely and crashes the browser tab.
Fix: Add a depth prop to TreeNode that increments with each recursive call. Return null when depth exceeds 10 (or your desired maximum). Pass depth={0} at the root FileTreeSidebar call.
The recursive TreeNode causes infinite rendering. Add a depth prop that increments with each recursive call. Return null when depth exceeds 10 to prevent infinite recursion.
Expand/collapse state resets when parent re-rendersWhy: Each TreeNode stores its own expanded state in local useState. When the parent FileTreeSidebar re-renders (e.g. on a search filter update or data refresh), React may remount child components and reset their state to the initial value.
Fix: Lift the expanded state out of TreeNode into a Map stored with useReducer or useRef in the parent FileTreeSidebar, keyed by node path or id. Pass the expanded status and toggle function as props to each TreeNode.
Folder expand/collapse state resets unexpectedly. Lift the expanded state out of TreeNode into a Map stored with useReducer in FileTreeSidebar, keyed by node path. Pass expanded status and toggle function as props to each TreeNode.
window is not defined when importing drag-and-drop libraryWhy: @dnd-kit, react-dnd, and similar drag-and-drop libraries access browser APIs (window, document) during module initialization. Next.js SSR attempts to import them on the server where these globals do not exist.
Fix: Wrap any component that imports a drag-and-drop library in a next/dynamic import with ssr: false. This defers the import to the client and prevents the SSR error.
The drag-and-drop library causes 'window is not defined' during SSR. Wrap the draggable FileTreeSidebar with next/dynamic(() => import('./DraggableTree'), { ssr: false }) so it only renders on the client.File icons from lucide-react not found (cannot find module or icon does not exist)Why: V0 sometimes references lucide-react icon names that were renamed or removed in newer versions of the package. For example, FileCode may not exist while FileCode2 does.
Fix: Check lucide.dev/icons to verify the exact icon name exists in the installed version. Replace non-existent icons with available alternatives — File as a generic fallback, Folder instead of FolderOpen if needed.
Some lucide-react icons in FileContextMenu are not found. Replace non-existent icon names with available alternatives: use File instead of FileCode, Folder instead of FolderOpen if needed. Check lucide.dev for the exact names in the installed version.
Template vs. custom — the honest call
A forked template gets you far, fast. Here's where it holds up, and where you'll outgrow it.
The template is enough when
- You are building a VS Code-like dev tool or CMS file browser and need the tree UI scaffolded fast
- Your file structure is static or small enough to fit in a constants file
- You want to demonstrate a file system metaphor in a demo, prototype, or internal tool
- You need a self-contained tree component with no third-party tree library dependency
Go custom when
- You need real filesystem access — reading from disk requires Node.js fs in an API route, not a client-side component
- Your tree has 10,000+ nodes and needs virtualized rendering for performance
- You need multi-select, bulk operations, clipboard copy/paste across folders, or undo/redo history
RapidDev connects V0 file tree UIs to real Supabase Storage or S3 backends with proper permission checks, upload flows, and real-time updates.
Frequently asked questions
Is this file tree template free?
Yes. V0 community templates are free to fork with a free V0 account. You can use the code in personal and commercial projects without licensing fees.
Can I use this template commercially — for example, inside a paid SaaS product?
Yes. V0 community templates carry no commercial-use restrictions. You own the forked code and can ship it as part of any paid product.
Why does my fork break in the V0 preview after adding drag-and-drop?
Drag-and-drop libraries like @dnd-kit access window and document during module initialization. V0's preview sandbox runs SSR, which fails when these browser globals are missing. Wrap your draggable component in next/dynamic with ssr: false — see the gotcha above — and verify on the deployed Vercel URL instead.
The tree crashes the browser tab when I give it real data. What is happening?
The recursive TreeNode component does not have a depth cap by default. If your tree data has circular references or is very deep, it will render infinitely. Paste the infinite loop fix prompt from the Gotchas section into V0 chat to add a maxDepth guard.
How do I connect the file tree to a real file system or cloud storage?
The static constants file approach only works for small, known file structures. For real data, use the Supabase Storage prompt from the prompt pack above to fetch file paths from a bucket, or create a Next.js API route that reads from your storage provider and returns the nested tree structure.
Can I use this for a documentation site where the sidebar IS the file tree?
Yes, but the Documentation Starter template is better suited — it pairs the file tree pattern with MDX rendering, BreadcrumbNav, and PrevNextNav specifically for docs. This template is optimized for file manager and dev tool UIs.
Folder expand state resets when I search or filter the tree. How do I fix it?
Local useState in each TreeNode resets when the parent re-renders. Lift the expanded state to a Map in the parent FileTreeSidebar component — the Gotchas section above has the exact fix prompt to paste into V0 chat.
Can RapidDev help connect this file tree to Supabase Storage or S3?
Yes. RapidDev connects V0 file tree UIs to real storage backends with permission checks, upload flows, and real-time updates. Visit rapidevelopers.com for details.
Outgrowing the template?
RapidDev turns v0 prototypes into production apps — real auth, database, and payments — at $13K–$25K.
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