Storybook visual regression testing with Lost Pixel and React

Lost Pixel is an open-source visual regression testing tool designed to identify UI changes by comparing rendered images of components, an approach distinct from traditional snapshot testing. The article provides a detailed guide on integrating Lost Pixel with Storybook, a tool that isolates UI components to streamline React development, allowing for independent coding and documentation of application building blocks. It walks through setting up a React project with Vite, configuring Storybook, and implementing Lost Pixel for visual regression testing. The process involves creating GitHub workflows for generating baselines and testing changes, with detailed steps for setting up authentication via GitHub tokens. By contrasting new component images against established baselines, Lost Pixel effectively flags regressions, providing developers with a robust alternative for UI regression testing.