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Measured entry

shadcn-block-calendar-04

calendarminimal-flat

A client-side React block for selecting a date range in one month. It ships as a shadcn registry TSX file with local selection state and wraps the shared shadcn Calendar component. That primitive brings in react-day-picker, date-fns, Radix Slot, Tailwind styling, and the usual cn utility.

Specimen
Harness screenshot of shadcn-block-calendar-04 at 375 pixels wide
Harness screenshot at 375 pixels wide. No horizontal overflow recorded.
Harness screenshot of shadcn-block-calendar-04 at 768 pixels wide
Harness screenshot at 768 pixels wide. No horizontal overflow recorded.
Harness screenshot of shadcn-block-calendar-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-calendar-04
BuildOK
MountOK
Console errors0
Uncaught page errors0
Horizontal overflowclean at 375, 768, 1440
Axe critical0
Axe serious0
Axe moderate0
Axe minor0
Gzip marginal50.9 KB (116.3 KB build, 65.4 KB baseline)
Bare modeFAIL
Provider requiredNO
Demo usednone

What the harness recorded

BARE BUILD

✗ Build failed in 29.48s
error during build:
[vite:load-fallback] Could not load <sandbox>/src/lib/utils (imported by src/components/ui/calendar.tsx): ENOENT: no such file or directory, open '<sandbox>/src/lib/utils'

Verdict

A solid, focused range-selection example for an existing shadcn codebase. It builds and mounts in the configured harness, but the bare mount fails because it needs a shadcn-style setup, including the shared utility module and calendar primitive.

Use it if

  • You need an inline date-range picker with a preselected interval.
  • Your app already uses shadcn components, Tailwind theme tokens, and path aliases.
  • You want selection state kept locally but easy to connect to form or filter state.

Skip it if

  • You need a single-date picker, time selection, or timezone-aware scheduling.
  • You want a standalone package that works without copying shadcn support files.
  • You need a popover field rather than an always-visible calendar.

Install

Installation record for shadcn-block-calendar-04
Declared dependenciesreact-day-picker@latest, date-fns, @radix-ui/react-slot
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 Calendar primitive, react-day-picker, date-fns, and Radix Slot. Provide the cn helper under the expected utility path, configure the import alias, and bring over the Tailwind theme tokens and component styles. Rewrite aliases if your project uses different paths.

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
2026-08-14

Alternatives

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