How the live demo works
Website Change Demo publishes three controlled versions of the same origin. Each version is a complete static snapshot you can hot-swap while the fixture server keeps serving HTTP responses.
v1-baseline
The reference snapshot. Crawl this first and wait for site-health analysis to finish
before switching versions. It includes /products.html and excludes the
pages added only in the changed state.
v2-changed
Introduces deliberate differences: three added pages, one removed page, metadata updates, a canonical mismatch, duplicate title and description cases, a broken internal link, a privacy-page noindex directive, and navigation that points to new documentation.
v3-restored
An exact copy of v1-baseline HTML. Switching here after v2 lets you verify that change history records reversals — one added page and three removed pages relative to v2, plus resolved metadata and indexability findings.
Consecutive completed crawls
Comparisons are made between consecutive completed crawls with compatible settings. A running crawl must not replace the latest comparable pair. Always wait for analysis to finish before reading Site Changes.
Atomic version switching
The switch-version.sh script replaces the live/ directory
atomically on the host. Because the fixture container bind-mounts that directory, the
next HTTP request serves the new version without restarting Node or Docker.
Deterministic test data
Fixed page sets and intentional SEO deltas make automated and manual tests reproducible. v3 intentionally restores v1 crawler-relevant content so v2 → v3 comparisons mirror v1 → v2 in reverse.
Read the full reference in documentation or inspect
expected-changes.json
in the repository.