Shadcn Code Block Code Folding

Nested code folding. Built by composing Button, Code Block, Scroll Area, Separator. A free, open source shadcn code block example you can install with npx shadcn@latest add @reui/c-code-block-23 and edit as your own code.

Fold regions detected from indentation, with nesting and fold-all controls.

For AI Agents

Hand your agent this brief or the ReUI MCP, not a screenshot. Free to install.

Best for: A sync function with 5 indentation regions, opening with its inner branch folded, plus Fold all and Unfold all in the header

When to use

Assistant replies and agent output that stream code, or lines a reader picks to ask about
Code review of diffs, git patches and diagnostics, with accept, reject and fix actions
Docs snippets and terminal or test logs with line numbers, copy, wrap, folding and search

When not to use

A long file cut at a fixed line count behind a Show more control: use the Code Block Long File example
A full assistant conversation screen with thread list, transcript and composer: use the AI Chat blocks
A discount or promo code shown for a shopper to copy at checkout: use the Coupon blocks
A release console with environment lanes, a deploy history grid and streaming logs: use the Dev Ops blocks

Agent notes

REGION_STARTS lists this snippet's fold starts by hand, so Fold all goes stale once code changes
Line specs such as highlightedLines, diff and folded count source lines from 1, whatever startLine prints in the gutter
maxLines caps height only on the built-in surface; with CodeBlockContent inside your own ScrollArea, cap that viewport yourself
Hoist transformers to module scope; a new array on every render re-tokenizes the whole file

Markdownhttps://reui.io/components/code-block/c-code-block-23.md

MCPget_example("c-code-block-23")

Installnpx shadcn@latest add @reui/c-code-block-23

Full index for agents:llms.txtReUI MCP setup

Shadcn Components in Code Block Code Folding

About Shadcn Code Block Code Folding

What You Can Build With Shadcn Code Block Code Folding

Composes Button, Code Block, Scroll Area, Separator, so it drops into any project already using those components.
Install it with the shadcn CLI: npx shadcn@latest add @reui/c-code-block-23
Open source and free, with the full source on this page to copy or adapt.

More Shadcn Code Block Examples

Basic Basic code block
Pinned Copy Pinned copy button
Streaming Agent Streaming agent response
AI Chat AI chat with code fences
Diff Summary Diff with change summary
Transformer Diff Diff via shiki transformers
Highlights Highlighted lines and words
Focus Walkthrough Focus walkthrough
Terminal Output Terminal output
Long File Long file with expand
Diagnostics & Actions Line actions and diagnostics
Line Selection Line selection

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Frequently Asked Questions

When should I use Shadcn Code Block Code Folding?

Use it for a sync function with 5 indentation regions, opening with its inner branch folded, plus Fold all and Unfold all in the header.

Shadcn Code Block as a whole fits:

Assistant replies and agent output that stream code, or lines a reader picks to ask about
Code review of diffs, git patches and diagnostics, with accept, reject and fix actions
Docs snippets and terminal or test logs with line numbers, copy, wrap, folding and search

For a long file cut at a fixed line count behind a Show more control, use the Code Block Long File example. For a full assistant conversation screen with thread list, transcript and composer, use the AI Chat blocks. For a discount or promo code shown for a shopper to copy at checkout, use the Coupon blocks. For a release console with environment lanes, a deploy history grid and streaming logs, use the Dev Ops blocks.

How do I install Shadcn Code Block Code Folding?

Run npx shadcn@latest add @reui/c-code-block-23. The CLI copies the source into your project, so you own the code and can edit it freely.

Is Shadcn Code Block Code Folding free to use?

Yes. Every ReUI component example is open source and free for personal and commercial projects.

Which components does Shadcn Code Block Code Folding use?

It composes Button, Code Block, Scroll Area, Separator. The shadcn CLI installs those alongside the example.

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