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Measured entry

shadcn-block-sidebar-03

sidebarminimal-flat

A documentation-style dashboard shell with a responsive sidebar, nested navigation, active-link treatment, a rail, header controls, breadcrumbs, and placeholder content. It ships as a shadcn registry block with a page and AppSidebar component, relying on the sidebar, breadcrumb, and separator primitives plus Radix UI, class-variance-authority, and Lucide icons.

Specimen
Harness screenshot of shadcn-block-sidebar-03 at 375 pixels wide
Harness screenshot at 375 pixels wide. No horizontal overflow recorded.
Harness screenshot of shadcn-block-sidebar-03 at 768 pixels wide
Harness screenshot at 768 pixels wide. No horizontal overflow recorded.
Harness screenshot of shadcn-block-sidebar-03 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-03
BuildOK
MountOK
Console errors0
Uncaught page errors0
Horizontal overflowclean at 375, 768, 1440
Axe critical0
Axe serious0
Axe moderate2
Axe minor0
Gzip marginal58.7 KB (124.1 KB build, 65.4 KB baseline)
Bare modeFAIL
Provider requiredNO
Demo usednone

What the harness recorded

BARE BUILD

✗ Build failed in 24.11s
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, with responsive behavior and successful mounting in the prepared harness. It needs a shadcn-style setup and is not drop-in for a bare React project. Replace the sample links and data, then correct the main-landmark composition before release.

Use it if

  • You need a documentation or settings shell with grouped navigation and visible child links.
  • Your project already uses shadcn conventions, Tailwind theme tokens, and the at-sign import alias.
  • You want a responsive sidebar foundation that includes a trigger, rail, inset content, and breadcrumb header.

Skip it if

  • You need production routing or collapsible submenu behavior without replacing the placeholder links and static sample data.
  • Your app cannot adopt the shadcn utility, alias, primitive, and theme-token conventions this block expects.
  • You require clean landmark semantics out of the box, since the tested composition produced nested and duplicate main landmarks.
  • You are minimizing dependency and bundle overhead for a simple navigation list.

Install

Installation record for shadcn-block-sidebar-03
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

For a non-shadcn project, configure the at-sign source alias, add the shared cn utility under the expected lib path, set up Tailwind and the sidebar theme variables, copy the sidebar, breadcrumb, and separator primitives, and install Radix UI, class-variance-authority, and Lucide React. Also ensure only one top-level main landmark remains in the final page shell.

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.