Testing
Component libraries are the infrastructure of modern frontend development. When a Button component's padding changes, every screen that uses Button changes. When a form field's focus style regresses, every form in your app is affected. Testing at the component level is the highest-leverage place to
Testing
Cross-browser visual testing is where most visual regression testing practices break down. What works cleanly for a single Chrome environment becomes a noise factory when you add Firefox, Safari, and mobile browsers — each with slightly different font rendering, antialiasing, and CSS implementation details. The solution isn't to
Testing
Visual regression testing has a fundamental tension: be sensitive enough to catch real bugs, but not so sensitive that you drown in false positives. How you resolve that tension depends almost entirely on your comparison method. There are two main approaches: pixel-level diffing (compare every pixel) and AI-based