Local synthetic demonstration
Two defects.
Visible evidence.
A deliberately broken fixture and a healthy control show what these two browser checks can detect. This is not a customer audit.
Observed 2026-09-12T15:21:59.374Z · Chromium 153.0.8010.12 · 8 expected detection/control assertions passed.
Observed results
| Fixture / viewport | Horizontal overflow | CTA destination | Screenshots |
|---|---|---|---|
| broken · 390 × 844 | 738px — defect observed | HTTP 404 | Page · After clicking the CTA |
| broken · 1440 × 900 | 0px — no overflow observed | HTTP 404 | Page · After clicking the CTA |
| healthy · 390 × 844 | 0px — no overflow observed | HTTP 200 | Page · After clicking the CTA |
| healthy · 1440 × 900 | 0px — no overflow observed | HTTP 200 | Page · After clicking the CTA |
Reproduce and resolve
- Missing CTA destination: click “Book a demo appointment” in the broken fixture. The destination returns HTTP 404. Point the link to an available destination and rerun the check. The healthy control returns HTTP 200.
- Mobile overflow: open the broken fixture at 390px width. Its fixed-width panel extends beyond the viewport. Apply responsive sizing and rerun. The healthy control has no document overflow at either tested size.
Mobile evidence
broken · 390 × 844
Full-page capture. The broken page extends beyond its 390px viewport; its image is therefore wider than the healthy control.
healthy · 390 × 844
Full-page capture. The broken page extends beyond its 390px viewport; its image is therefore wider than the healthy control.
Coverage limits
These results cover one designated button and document overflow in local fixtures. HTTP 200 does not prove a real booking occurred. No external sites were tested, no appointments were booked, and these observations do not establish customer demand, conversion impact, comprehensive QA, accessibility, or security.