wtf is visual-regression-slides?

This repository contains a slide deck presentation about visual regression testing with Capybara and PhantomJS. It's not a tool or application you'd integrate into a project, but rather a set of slides that someone put together to explain or teach the concept of visual regression testing, which is a technique for catching unintended visual changes in a web app's UI. The presentation itself is built using Bespoke.js, a framework for creating HTML-based slide decks. To view it, you'd need to install Node.js, Bower, and Gulp on your computer, then run a couple of commands to download dependencies and start a local preview server. Once running, you'd view the slides in your browser. The audience for this would likely be developers or QA engineers attending a talk or workshop on automated testing. Visual regression testing matters when you want to make sure a code change doesn't accidentally break how a page looks, for example shifting a button out of place or changing colors unexpectedly. Capybara is a testing framework commonly used in Ruby, and PhantomJS was a headless browser that could render pages without a visible window, which made it useful for automated screenshot comparisons. What's notable here is that the project relies on PhantomJS, which has since been deprecated and is no longer maintained, meaning the specific tooling discussed in these slides is largely outdated. Modern visual regression testing has moved to other headless browser solutions. The README doesn't go into detail about the actual slide content, so it's unclear how much practical guidance the presentation offers beyond the conceptual level.