Assuming client-side JS content gets indexed like static HTML

Assuming client-side JS content gets indexed like static HTML

Google renders JavaScript, so people assume parity with static HTML. The failure mode: rendering happens on a second, delayed pass, content behind a click/scroll never fires, and Bing renders far less reliably than Google. Your main content can be invisible at index time.

What works:
— Googlebot does run a modern Chromium renderer
— Critical content present in the initial HTML always indexes

Where it falls short:
— Render-queue delay means JS pages index slower
— Content gated behind user interaction often isn't seen
— Bing/other engines render inconsistently or not at all

The fix: check the rendered HTML in URL Inspection — if your main copy, title, or links are missing, you have a render problem, not a crawl one. Use SSR or pre-rendering for primary content and links; lazy-load only non-essential extras.

Best for: SPA and JS-heavy sites.
Not for: anyone trusting "Google renders JS" without checking the rendered output.