Reading Time

Preview

Rendered from the story the storybook (a11y) CI gate runs axe against — the preview can't show something that hasn't been verified.

Install

Two equivalent paths — the URL works in any shadcn-CLI setup; the alias works once you've registered @interlace in your components.json.

npx shadcn@latest add https://ds.interlace.tools/r/reading-time.json

npx shadcn@latest add @interlace/reading-time

Import

2 named exports — pull the parts you need.

import { MIN_VIEWPORT, ReadingTime } from '@/components/ui/reading-time';

Anatomy

Extracted from the primitive's JSDoc header. The source is the only documentation that can't drift.

ReadingTime                        (span — data-min-viewport=320)
    ├─ {showIcon && <Clock />}       (optional 14px lucide outline, aria-hidden)
    └─ "<N> min read"                (text node)

API reference

Parsed from the type declarations in the source — the same file the install writes into your tree, so this table can't drift from the component you get.

Skeleton

Pass loading and the component renders a shape-matched <Skeleton /> in its own place — same box, so nothing reflows when the data lands. Below is the same story with loading={true}.

<MIN_VIEWPORT loading={isPending} />

Accessibility

Every story for this component is rendered headlessly and checked with axe-core (wcag2aa, wcag22aa, best-practice, ACT) on every PR. That gate has no continue-on-error, so what ships has zero known violations.

What follows is what static analysis can see. Axe cannot press a key and never sees an overlay open, so the operable-without-a-mouse claim lives in Behavior instead, where the keyboard path is replayed step by step.

Focus + keyboard behaviour

Native element semantics — no interaction layer to get wrong.

Focus ring (WCAG 2.2 SC 2.4.13)

Not focusable — no focus indicator required.

Reduced motion

No animation to gate.

ARIA in the source

None — semantics come from the element or the Base UI primitive rather than hand-written ARIA.

Examples

3 more states from the same story file.

R-rule compliance

Every primitive in @interlace/ui models to the portable 26-rule floor enforced by the componentApi ESLint preset. The cells below pin exactly where each rule applies in this file.

Dependencies

Base UI primitive

Native / no Base UI dependency

Lucide icons

• Clock

NPM dependencies

• lucide-react

Registry dependencies

• @interlace/theme
• @interlace/cn
• @interlace/skeleton

Source

The full implementation — components/ui/reading-time.tsx once installed.

import * as React from 'react';

// @interlace/reading-time v1.2.0 — Interlace design system.
// Docs, props and live preview: https://ds.interlace.tools/c/reading-time
// What changed since: https://ds.interlace.tools/c/reading-time#history
// Generated banner — keep it, the upgrade diff reads this version.

/**
 * @interlace/ui — ReadingTime
 *
 * A compact "N min read" badge for article headers, blog cards and docs index
 * rows. It renders an inline `<span>`, so it sits beside a date or a tag row
 * without imposing block layout.
 *
 * The number is repeated on `data-reading-time`, so analytics, scrapers and
 * JSON-LD builders never have to parse the rendered text.
 *
 * The label is a literal: `{minutes} min read`, English, hard-coded. There is
 * no children slot and no way to translate it from a call site — localisation
 * means a wrapper at a higher altitude, not a prop here. Nothing rounds or

…94 more lines…

Registry JSON

The raw registry record — what the shadcn CLI fetches.