vibecodng.com

Free MCP betaIndex and tools live

Measured entry

shadcn-block-sidebar-04

sidebarminimal-flat

A shadcn registry block for a documentation-style layout with a floating sidebar, nested navigation links, a header trigger, breadcrumbs, and a content inset. It ships as a page plus an AppSidebar component, uses sample navigation data, and depends on the shadcn sidebar, breadcrumb, and separator primitives alongside Radix UI, class-variance-authority, and Lucide icons.

Specimen
Harness screenshot of shadcn-block-sidebar-04 at 375 pixels wide
Harness screenshot at 375 pixels wide. No horizontal overflow recorded.
Harness screenshot of shadcn-block-sidebar-04 at 768 pixels wide
Harness screenshot at 768 pixels wide. No horizontal overflow recorded.
Harness screenshot of shadcn-block-sidebar-04 at 1440 pixels wide
Harness screenshot at 1440 pixels wide. No horizontal overflow recorded.

Measured

Every value below was written by the harness on the run that produced the frames above. None of it is derived from the prose.

Harness measurements recorded for shadcn-block-sidebar-04
BuildOK
MountOK
Console errors0
Uncaught page errors0
Horizontal overflowclean at 375, 768, 1440
Axe critical0
Axe serious0
Axe moderate2
Axe minor0
Gzip marginal58.6 KB (124.0 KB build, 65.4 KB baseline)
Bare modeFAIL
Provider requiredNO
Demo usednone

What the harness recorded

BARE BUILD

✗ Build failed in 28.24s
error during build:
[vite:load-fallback] Could not load <sandbox>/src/lib/utils (imported by src/components/ui/breadcrumb.tsx): ENOENT: no such file or directory, open '<sandbox>/src/lib/utils'

Verdict

A solid starting shell for documentation-heavy products already using shadcn. It builds and mounts cleanly in that environment, but the landmark structure needs attention when embedded in an existing page. The bare mount fails, so it needs a shadcn-style setup rather than a direct copy into a plain React app.

Use it if

  • You need a documentation or settings shell with grouped links and visible subnavigation.
  • Your app already uses shadcn conventions and can replace the sample links with route data.
  • You want a responsive sidebar shell that avoids horizontal overflow across common layouts.

Skip it if

  • You need a standalone component that can be copied into an unconfigured React project.
  • Your navigation requires collapsible groups rather than submenus that are always shown.
  • Your page already owns its main landmark and you cannot adjust the block's landmark structure.
  • You want a small navigation primitive without the surrounding page header, breadcrumbs, and content shell.

Install

Installation record for shadcn-block-sidebar-04
Declared dependenciesradix-ui, class-variance-authority, lucide-react
Missing on installnone
Bare installfails once the shadcn-style helpers are removed, so it needs that setup
Providerno provider required in the harness

In a non-shadcn project, add the sidebar, breadcrumb, and separator implementations; configure the at-sign source alias and the shared cn utility; bring over the required theme variables and utility styles; and install Radix UI, class-variance-authority, and Lucide React. Also ensure the resulting page exposes only one top-level main landmark.

Source and credit

This page is a review, not a copy. The component source lives with its author and this site does not republish it. Read the license before you use anything.

Author repository

github.com/shadcn-ui/ui
License
MIT
Record published
2026-08-13

Alternatives

Other published entries for the sidebar pattern, ordered by what they measured: mounts first, then clean axe scans, then bare-mode passes, then the smaller bundle.