A JavaScript page needs more than a successful browser screenshot. This checklist separates the initial response, rendered content and discoverable links so a development team can investigate a specific rendering problem without rewriting the whole site.
Fetch a representative URL and save its status, headers and initial HTML. Check whether the main answer, title, canonical and important links are present. If the response is only an empty shell, record that observation; do not assume every crawler will execute the same interaction as your browser.
Load the same URL in a browser and compare the main content with the initial HTML. Identify what appears only after scripts run and whether any user interaction is required. Keep differences tied to a component or data request rather than describing the entire framework as broken.
Important destinations should be represented by ordinary links with meaningful href values. Review a menu, related-content area and pagination where applicable. A control that changes local state may be useful to a visitor but should not be assumed to expose a discoverable document URL.
A missing route should not return an unrelated success page merely because the single-page application can render a shell. Compare a real page and an intentionally unknown path. Confirm the response behavior at the deployment layer as well as the browser’s displayed message.
For a content site, server rendering or pre-rendering may make important content available earlier. Decide based on the affected template and deployment stack. For example, a guide’s body and canonical can be emitted in initial HTML while an optional carousel stays interactive.
After release, compare the response, rendered page, navigation and real 404 behavior again. Use authorized inspection tools to investigate search rendering separately. Passing a build is necessary evidence for deployment, but it does not establish that a search engine has indexed the new version.
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