Callout

Inline-prose annotation. The "stop and read this" surface that punctuates long-form content (docs, MDX, READMEs). Distinct from `Alert` — Alert is an out-of-band runtime banner ("your save failed"), Callout is an in-band authored aside ("note: this rule is…

blog & long-formserver320pxuiv1.0.0

Preview

Callout — live renderprimitives-callout--default

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.

Via shadcn URL
npx shadcn@latest add https://ds.interlace.tools/r/callout.json
With the @interlace alias
npx shadcn@latest add @interlace/callout

Behavior

What this component does — the keyboard path, the measured colour, the text equivalent and the states it can be in. Every figure below is read out of the test or the source that enforces it by scripts/build-behavior-map.mjs, so nothing here can outlive the gate that keeps it true.

Every semantic colour pair this component's own source uses, measured against the shipped hexes in all 4 theme × scheme combinations. The tightest is destructive on background at 7.60:1 (harbor · light), against a floor of 3:1.

Measured WCAG contrast ratios per token pair and theme
PairinterlacelightinterlacedarkharborlightharbordarkFloor
destructive on backgrounddestructive tint on the page surface8.31:110.43:17.60:110.03:13.0:1SC 1.4.11
destructive on carddestructive tint inside a card8.31:19.66:18.02:19.09:13.0:1SC 1.4.11
primary on backgroundprimary tint on the page surface8.80:111.79:18.39:110.03:13.0:1SC 1.4.11
primary on cardprimary tint inside a card8.80:110.92:18.86:19.10:13.0:1SC 1.4.11
foreground on backgroundbody copy19.65:116.97:117.74:116.19:14.5:1SC 1.4.3

Text pairs are held to 4.5:1 (WCAG 2.2 SC 1.4.3); borders, rings and chart axes to 3:1 (SC 1.4.11 non-text). Bold is the worst cell in the row — the one a brand fork has to keep an eye on.

Where it renders, how narrow it survives, and whether its lines are inside the coverage gate — three answers a consumer needs before the paste, not after the bug.

Render boundary
server component

Renders during SSR / RSC with no hydration cost. It can be imported from a server component without pulling the page into the client.

Minimum viewport
MIN_VIEWPORT = 320

Declared, not assumed. Below 320 CSS px the preflight contract draws a dev-mode outline — how to switch it on.

Coverage gate
100% × 4

Inside the v8 gate: lines 100, statements 100, functions 100, branches 100. A threshold under 100 only records how much you stopped caring, so there isn't one.

History

This component is at v1.0.0, first shipped in @interlace/ui 1.0.0. The version is stamped as a banner into the file the install writes, so the copy in your tree says which one you have — compare it with the number above before deciding whether to re-run the install.

No release note names this component yet. It shipped with the release above and has not changed since — see the full changelog for what moved elsewhere in the DS.

Import

3 named exports — pull the parts you need.

Public API
import { Callout, MIN_VIEWPORT, calloutVariants } from '@/components/ui/callout';

Anatomy

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

Callout                            (div — role="note" — data-min-viewport=320)
    ├─ {icon}                        (lucide, decorative — aria-hidden)
    └─ <div>                         (text column)
        ├─ {title?}                  (Typography variant=ui font-medium)
        └─ {children}                (free-form prose)

Variants

Closed prop unions enforced by class-variance-authority. See Storybook's Variants story for the rendered matrix.

  • tone
    • infodefault
    • note
    • success
    • warn
    • danger

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.

CalloutProps

Also accepts every <div> attribute. Plus the variant props listed above.

PropTypeDescription
titleReact.ReactNodeOptional headline above the body. Renders as Typography variant=ui font-medium. Note: overrides the native `<div title>` tooltip attribute with a React node — the native tooltip is rarely useful on a Callout and the visible heading wins.
childrenReact.ReactNode

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
  • role="note"

Examples

2 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.

RuleConceptWhere
R4Extends native el + VariantProps`React.ComponentProps<'div'> & VariantProps<...>` + props
R6data-slot on root`data-slot="callout"` + data-tone
R7className merged + ...rest + ref`cn(calloutVariants(...), className)` + `{...props}`
R8No `isXxx`; enum for tone`tone` is a 5-way enum, never a boolean
R10Composition seam`title` slot + `children`
R14Declares min viewport`data-min-viewport={String(MIN_VIEWPORT)}` + exported const
R18Tailwind onlyzero inline `style`; cva classes + Lucide via className
R19Tokens only`p-md` / `rounded-md` / `border-l-*` widths via spacing + radius tokens; colors via semantic tokens
R20AA contrasttones map to AA-cleared semantic tokens (primary/destructive/foreground/muted-foreground) + neutral surface
R25Server componentno hooks → no `'use client'`
R26A11y from native el`role="note"` on the div; lucide icon marked `aria-hidden`

Minimum viewport

This primitive declares MIN_VIEWPORT = 320 CSS px (DESIGN_PRINCIPLES #14). When mounted in a container narrower than this, the preflight contract draws a dev-mode outline so the regression is visible during local development.

Opt-in to the dev-mode warning
<body data-interlace-dev>...</body>

Add the data-interlace-dev attribute to the body in development builds only — preflight then outlines any primitive whose container is below its declared data-min-viewport.

Dependencies

Base UI primitive
Native / no Base UI dependency
Lucide icons
  • CircleCheck
  • Info
  • Lightbulb
  • OctagonAlert
  • TriangleAlert
NPM dependencies
  • class-variance-authority
  • lucide-react

Source

The full implementation — components/ui/callout.tsx once installed.

178 lines · TypeScript
import * as React from 'react';

// @interlace/callout v1.0.0 — Interlace design system.
// Docs, props and live preview: https://ds.interlace.tools/c/callout
// What changed since: https://ds.interlace.tools/c/callout#history
// Generated banner — keep it, the upgrade diff reads this version.

/**
 * @interlace/ui — Callout
 *
 * Inline-prose annotation. The "stop and read this" surface that punctuates
 * long-form content (docs, MDX, READMEs). Distinct from `Alert` — Alert is
 * an out-of-band runtime banner ("your save failed"), Callout is an in-band
 * authored aside ("note: this rule is type-aware"). Both can share pigment
 * but they live at different altitudes in the system.
 *
 * Five tones, each fixed to a lucide icon + a semantic-token border-tint:
 *
 *   - info     Info             — neutral context, parallel to the body
 *   - note     Lightbulb        — author tip / suggestion

…158 more lines…

Registry JSON

The raw registry record — what the shadcn CLI fetches.