html-diff

A lightweight JavaScript library to highlight changes between two HTML strings. It wraps inserted content with <ins> tags and deleted content with <del> tags, making it ideal for visualizing diffs in rich text content.

🚀 Features

• 🔍 Detects and highlights changes between two HTML strings
• 🧩 Wraps insertions in <ins> and deletions in <del>
• ⚡ No external dependencies
• ✅ Works in both browser and Node.js environments

🌐 Demo

You can see a live demo of html-diff in action here: Demo

📦 Installation

Install via npm:

npm install @benedicte/html-diff

🛠️ API

htmlDiff(htmlBefore: string, htmlAfter: string): string

Parameters:

• htmlBefore (required) – Original HTML string
• htmlAfter (required) – Updated HTML string

Returns the resulting HTML string with:

• Inserted content is wrapped in tags
• Deleted content is wrapped in tags

💡 Examples

import { htmlDiff } from '@benedicte/html-diff';

const before = '<p>Hello world!</p>';
const after = '<p>Hello brave new world</p>';
const result = htmlDiff(before, after);

console.log(result);
// Output: <p>Hello <ins>brave new </ins>world<del>!</del></p>

🔒 License

MIT

🤝 Contributing

Contributions, bug reports, and feature requests are welcome! Feel free to open an issue or submit a pull request.