How to catch visual regressions on every deploy with screenshot diffs

How to Catch Visual Regressions on Every Deploy with Screenshot Diffs CSS changes break layouts. A z-index tweak hides a button. A font change shifts text wrapping. Unit tests don't catch any of this — and by the time a user reports it, the deploy is already live. Visual regression testing captures screenshots before and after each deploy and diffs them. If pixels changed unexpectedly, the build fails. The usual setup: Playwright or Puppeteer in CI, with Docker to run a browser. It works but adds 5-10 minutes to build time and a heavyweight container. Here's a lighter approach: two PageBolt API calls, one pixel diff, no browser in CI. The workflow deploy to staging → screenshot staging → compare to baseline → fail if diff > threshold → deploy to production GitHub Actions workflow # .github/workflows/visual-regression.yml name : Visual regression on : pull_request : branches : [ main ] jobs : visual-diff : runs-on : ubuntu-latest steps : - uses : actions/checkout@v4 - name : Set up Node