Expandable card
A React component in Beamline's Layout category.
A dense card that grows in place when asked: the frame resizes and the clamped preview opens into the full text.
Use it for
- Dense cards (alerts, insights) that need room for detail on request.
Not for
- Full records (open a sheet).
Anatomy
- card (m-surface in both states)
- title
- description
- toggle (ghost icon Button, aria-expanded)
- body (owns 13px/1.6 ink-2 type; closed: previewLines lines, the last fading into the card)
States
- closed (clamped preview, faded last line)
- open (full text, wider frame)
Keyboard
- The toggle is a button with aria-expanded
Motion
The frame resizes on spring.smooth (critically damped, about 300 ms) while title and body keep their position; reduced motion switches instantly. The surface role never changes between states.
Props
| Prop | Type | Default | Description |
|---|---|---|---|
title / description | ReactNode | — | |
expanded / defaultExpanded / onExpandedChange | boolean | — | |
width / expandedWidth | number | 320 / 520 | |
previewLines | number | 2 | |
classNames | ExpandableCardClassNames | — | |
style / ref | CSSProperties / native Ref | — | native article |
Dependencies
lucide-react, motion
Import
import { ExpandableCard } from "@/components/expandable-card/expandable-card";Get it
Expandable card is part of Beamline: 190 React components and screens your coding agent (Claude Code, Codex, Cursor or any MCP client) installs into your app through Beamline's MCP server, as a ready-built package or as plain React source you can change. $49 one payment (regular $200), no subscription, a year of updates, one licence for your whole team. Get Beamline · Connect your agent
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