It Worked Locally… But Did It Match Staging? Meet DiffLens
DiffLens: Compare Local and Staging Web Apps with Visual, Content, and Markup Diffs Have you ever finished a UI change, opened staging, and wondered: “What exactly changed between my local build and staging?” A manual check can miss small layout shifts, changed text, or unexpected DOM updates. I built DiffLens to make those differences easier to inspect. DiffLens is a local web app that compares…
DiffLens is a web app designed to compare local and staging web applications visually, content-wise, and markup-wise. It addresses the issue of manual checks missing small changes such as layout shifts, altered text, and unexpected DOM updates. The tool captures both pages using Chromium at a fixed 1920 × 1080 viewport and compares them using pixelmatch for visual differences, line-by-line text comparison for content differences, and element snapshots matched by rendered CSS path for markup differences.
DiffLens provides separate comparison layers for visual, content, and markup changes, enabling developers to understand the differences and ship with confidence.
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