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Code Block

Changed Line

A listing that marks the line edited a moment ago: a bar, a tint and a short flash that fades on its own instead of blinking forever.

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 listing rows through the lines array
  • the file path through path
  • the changed line number through changedLine

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

Preview

1440pxHost theme
Changed Line — A listing that marks the line edited a moment ago: a bar, a tint and a short flash that fades on its own instead of blinking forever.

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-017?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

<Codeblock017
  path="components/cart.tsx"
  changedLine={3}
  agoLabel="changed just now"
/>

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

Settings

File
path · default: components/cart.tsx
Changed line
changedLine · default: 3
Background
background · default: theme colour

More in Code Block

FAQ

How do I add Changed Line 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 Changed Line depend on?
No npm packages beyond React and Tailwind CSS.
What can I change in Changed Line?
Adapt: the listing rows through the lines array; the file path through path; the changed line number through changedLine. Keep as installed: the local --vibeui-codeblock-017-* palette — do not swap it for your theme tokens; the single-run flash: an endless animation turns the block into a blinker and blocks reading; the final keyframe equal to the tint colour — otherwise the mark disappears once the animation ends.
Is Changed Line 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-017.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-017-* variables. Server component: no hooks. The line number is printed by a CSS counter in ::before and the change mark by ::after, so neither the digit nor the sign ends up in the clipboard. The change is marked by three independent signals: a bar on the left through an inset box-shadow, a translucent tint and a one-shot flash animation. The animation's last frame equals the tint colour, so once it finishes the mark stays in place instead of disappearing.

Tags

  • code
  • highlight
  • changed
  • edit
Component source

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

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