# Diff with change summary

> A props-driven diff with added and removed lines and a change summary.

A shadcn/ui block from the [@reui](https://reui.io) registry, listed on [shadcn.exchange](https://shadcn.exchange/r/reui/c-code-block-5).

- Page, with a live preview: https://shadcn.exchange/r/reui/c-code-block-5
- Screenshot: https://abzjhwgwpdpz7ua5.public.blob.vercel-storage.com/shots/reui/c-code-block-5-light-2562f3cb5a91c00f.png
- Registry item: https://reui.io/r/new-york-v4/c-code-block-5.json
- Listed: 2026-10-13, source last changed 2026-10-13

## Install

```bash
npx shadcn@latest add https://reui.io/r/new-york-v4/c-code-block-5.json
```

Run it in a project that has shadcn/ui set up. It adds the files below and installs what they depend on.

## Dependencies

- Registry items: `@reui/code-block`

## Files

### `c-code-block-5.tsx`

```tsx
import {
  CodeBlock,
  CodeBlockCopyButton,
  CodeBlockHeader,
  CodeBlockTitle,
} from "@/components/reui/code-block/code-block"

const code = `export function getCacheKey(request: Request) {
  const url = new URL(request.url)
  return url.href
  url.searchParams.delete("utm_source")
  url.searchParams.delete("utm_medium")
  url.searchParams.sort()
  return url.toString()
}`

export function Pattern() {
  return (
    <div className="w-full max-w-2xl">
      <CodeBlock
        code={code}
        language="typescript"
        showLineNumbers
        diff={{ added: [4, 5, 6, 7], removed: [3] }}
      >
        <CodeBlockHeader>
          <CodeBlockTitle>lib/cache-key.ts</CodeBlockTitle>
          <CodeBlockCopyButton className="ml-auto" />
        </CodeBlockHeader>
      </CodeBlock>
    </div>
  )
}
```