Puppeteer Visual Regression Testing

Runs pixel-level visual regression tests using Puppeteer page.screenshot() and pixelmatch diffing library. Compares baseline screenshots against current renders with configurable threshold tolerance.

Installation

Use the upstream install or setup path that matches your environment:

• npm i puppeteer # Downloads compatible Chrome during installation.
• npm i puppeteer-core # Alternatively, install as a library, without downloading Chrome.

Basic usage or getting-started notes:

• bash npm2yarn

• MCP

• a Puppeteer-based MCP server for browser automation and debugging.

• Source: https://github.com/puppeteer/puppeteer

• Extracted from upstream docs: https://raw.githubusercontent.com/puppeteer/puppeteer/HEAD/README.md

Documentation