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Measured entry

shadcn-block-calendar-09

calendarminimal-flat

A client-side React date-range picker that shows adjacent months and prevents weekend selection. It ships as a shadcn registry block around the shared Calendar component, using React state, react-day-picker, date-fns, Radix Slot, Lucide icons, button primitives, utility classes, and the cn helper.

Specimen
Harness screenshot of shadcn-block-calendar-09 at 375 pixels wide
Harness screenshot at 375 pixels wide. No horizontal overflow recorded.
Harness screenshot of shadcn-block-calendar-09 at 768 pixels wide
Harness screenshot at 768 pixels wide. No horizontal overflow recorded.
Harness screenshot of shadcn-block-calendar-09 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-09
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 31.95s
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 good fit for weekday range selection in an existing shadcn codebase. The configured component builds and mounts cleanly, but the bare case fails on the missing cn utility, so it needs a shadcn-style setup and is not a drop-in React widget.

Use it if

  • Booking or scheduling flows where users select a contiguous weekday range.
  • An existing shadcn app already has the Calendar and Button primitives plus theme tokens.
  • Teams want an inline picker with neighboring months visible and disabled dates excluded from range selection.

Skip it if

  • Weekend selection is valid for the product and should not be blocked.
  • The flow needs only a single date, freeform date input, or a compact popover trigger.
  • The project avoids Tailwind and shadcn conventions or cannot accept the calendar dependency footprint.
  • Date availability depends on time zones, holidays, inventory, or server-side business rules beyond a weekday filter.

Install

Installation record for shadcn-block-calendar-09
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 react-day-picker, date-fns, Radix Slot, and Lucide React; copy the Calendar and Button primitives; provide the cn utility and import alias; and map the Tailwind utilities and theme tokens used by those primitives.

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.