Shadcn Code Block Pre-Highlighted Lines

Pre-highlighted lines. Built with the Code Block component. A free, open source shadcn code block example you can install with npx shadcn@latest add @reui/c-code-block-15 and edit as your own code.

Lines built without shiki, the shape a server component passes down.

For AI Agents

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

Best for: Hand built tokens that color 4 Python keywords in light and dark, passed as lines so the client loads no highlighter

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 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

lines colors only 4 keywords with fixed hex values; pass highlightCode output from your server for real highlighting
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-15.md

MCPget_example("c-code-block-15")

Installnpx shadcn@latest add @reui/c-code-block-15

Full index for agents:llms.txtReUI MCP setup

Shadcn Components in Code Block Pre-Highlighted Lines

Code Block

About Shadcn Code Block Pre-Highlighted Lines

Pre-highlighted lines. Built with the Code Block component. A free, open source shadcn code block example you can install with npx shadcn@latest add @reui/c-code-block-15 and edit as your own code.

What You Can Build With Shadcn Code Block Pre-Highlighted Lines

Composes Code Block, so it drops into any project already using those components.
Install it with the shadcn CLI: npx shadcn@latest add @reui/c-code-block-15
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 Pre-Highlighted Lines?

Use it for hand built tokens that color 4 Python keywords in light and dark, passed as lines so the client loads no highlighter.

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 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 Pre-Highlighted Lines?

Run npx shadcn@latest add @reui/c-code-block-15. The CLI copies the source into your project, so you own the code and can edit it freely.

Is Shadcn Code Block Pre-Highlighted Lines free to use?

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

Which components does Shadcn Code Block Pre-Highlighted Lines use?

It composes Code Block. The shadcn CLI installs those alongside the example.

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