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Code Block

Height Cap

A code block capped by height rather than by line count: it expands smoothly and needs no scripts. Change the code and the collapsed height.

React + Tailwind, shadcn-compatible: press “Copy for AI” and your Cursor or Claude Code agent installs it with the shadcn CLI.

What you can change

  • the block code through code
  • the file path through path
  • the collapsed height through collapsedHeight

A link for your AI agent: preview, code and instructions.

Preview

1440pxHost theme
Height Cap — A code block capped by height rather than by line count: it expands smoothly and needs no scripts. Change the code and the collapsed height.

Use it with AI

  1. 1. Copy the link.
  2. 2. Write to your agent in your own words and drop the link into the sentence.
  3. 3. The agent opens the link and installs the component from the registry.
AI
1Pick it here

put this on the home page as the hero:

https://vibeui.club/c/codeblock-025?lang=en&theme=dark

2Paste into the chat
3Get it in your project

Not sure where to paste it? Step-by-step guide

Show the full instructions

What the link says, spelled out. Use it when your agent cannot open links — paste this text instead.

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How to use

<Codeblock025
  path="lib/pricing.ts"
  collapsedHeight={9}
  expandedHeight={32}
/>

A sample call. The agent installs the component itself from the registry via the “Copy for AI” link.

Settings

File
path · default: lib/pricing.ts
Collapsed height, rem
collapsedHeight · default: 9
Expand caption
expandText · default: Expand
Collapse caption
collapseText · default: Collapse
Background
background · default: theme colour

More in Code Block

FAQ

How do I add Height Cap with Cursor or Claude Code?
Press “Copy for AI” on this page and paste it into your agent's chat. The instruction contains the shadcn CLI install command, the dependencies and what to keep, so the agent installs this exact component instead of recreating a lookalike.
What does Height Cap depend on?
No npm packages beyond React and Tailwind CSS.
What can I change in Height Cap?
Adapt: the block code through code; the file path through path; the collapsed height through collapsedHeight. Keep as installed: the local --vibeui-codeblock-025-* palette — do not swap it for your theme tokens; the checkbox as the source of state: with useState the block stops working before hydration; the bottom mask only while collapsed: when open it hides real code.
Is Height Cap free?
Yes. The preview is open without an account; with a free account you can copy up to 20 components a month.

For developers

npx shadcn@latest add https://vibeui.club/r/pro/codeblock-025.json

This command needs a signed link: sign in and open “Component source” below — it issues a working link valid for 30 minutes. All install options

Technical notes

The component is self-contained: one file, zero dependencies, its own palette in the local --vibeui-codeblock-025-* variables. Server component: the state is held by a native checkbox, and the root :has(input:checked) selector moves the code area from the collapsed block height to the expansion limit. Both heights arrive as props and go into CSS variables, so the max-height animation runs between two known values rather than up to auto. The bottom edge mask is on only in the collapsed state, and the toggle caption is swapped by a pair of spans hidden through :has().

Tags

  • code
  • collapse
  • height
  • no-js
Component source

The same file your agent installs. Here in case you would rather copy it by hand.

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