Question 1

What is a single-page application and why is its SEO different?

Accepted Answer

A single-page application loads a single HTML shell and uses JavaScript to render every route, swap content, and update history without full page reloads. SEO tools that scan only the initial HTML response see an empty shell. Search engines have to execute JavaScript to discover the real content, which works inconsistently and on a render budget. A real browser SEO audit reproduces what Googlebot sees instead of what curl returns.

Question 2

Does this audit work for non-React SPAs?

Accepted Answer

Yes. DeepAudit AI is framework-agnostic. The detection engine runs a real Chromium instance, waits for hydration regardless of which framework triggered it, and diffs the initial HTML response against the post-hydration DOM. The same JavaScript SEO scanner catches the same indexing failures whether the app is React, Vue, Angular, Svelte, Solid, Lit, or hand-rolled vanilla JS.

Question 3

How does Google handle SPAs in 2026?

Accepted Answer

Google indexes SPAs in two passes. The first pass reads the initial HTML response and discovers links. The second pass executes JavaScript on a render budget — typically a few seconds — and re-indexes whatever the rendered DOM contains. Pages that exceed the render budget get indexed only with their first-pass content, which for most SPAs is an empty shell. The audit shows you which routes are at risk before Search Console reports thin-content errors weeks later.

Question 4

What is hash routing and is it still a problem for SEO?

Accepted Answer

Hash routing uses URLs like /#/about instead of /about. Google ignores everything after the hash for indexing purposes, so hash-routed apps publish exactly one indexable URL no matter how many routes they have. The fix is the History API with real path-based URLs. Our scanner detects hash routing automatically and flags it as a critical SEO issue.

Question 5

Can a SPA pass Core Web Vitals?

Accepted Answer

Yes, but it requires deliberate engineering. JavaScript bundles, hydration cost, and runtime route transitions all push LCP and INP above the green thresholds. A Core Web Vitals audit on a SPA needs to measure the route transition itself, not just the initial load. DeepAudit AI runs the standard CWV battery on entry, and the deep scan captures route-transition metrics for the most important pages.

Question 6

How does the audit detect framework-specific failures?

Accepted Answer

The scanner detects the framework from runtime fingerprints — React DevTools hook, Vue 3 reactivity proxies, Angular zone.js, Svelte action attributes — then applies framework-aware checks on top of the framework-agnostic core. The hydration diff, route-discoverability check, and meta tag timing audit are universal; the framework recognition produces tailored remediation guidance in the report.

Question 7

Is server-side rendering required for SPA SEO?

Accepted Answer

Not strictly, but it raises the ceiling significantly. SSR or static generation lets Google index real content on the first pass without depending on the render budget. Pure CSR works for authenticated apps where SEO does not matter; for content sites, blogs, marketing pages, and ecommerce, SSR is the practical default. The audit identifies which routes need SSR most urgently based on render-budget risk and traffic potential.

Question 8

How long does the SPA SEO audit take?

Accepted Answer

Single URL: about 60 seconds. Deep scan crawling up to 50 routes from the sitemap: 5 to 10 minutes. The result is a downloadable PDF with hydration diff, framework detection, route-discoverability findings, structured data validation, and a full Core Web Vitals audit. No signup, no credit card.

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