How to Build a Visual Regression Test System Using Playwright

The summary is as follows: We have created a fully working visual regression system for UI components using Playwright, which automates the process of testing each component in isolation by loading the necessary scripts and styles into an empty page. The two utility functions `loadComponents` and `loadTemplate` are key to this process, allowing developers to create tests for every component in their library or page/user story with minimal code duplication. By running these tests locally, developers can get fast feedback and fix errors before even pushing changes, resulting in better quality and time savings. However, there is still room for improvement, including automating test generation, protecting against flakiness, integrating and optimizing tests in GitHub Actions, and developing a debugging mode for visual tests.