Question 1

Does Google execute all JavaScript on all pages?

Accepted Answer

Google executes JavaScript on pages it determines are worth rendering — which is most pages on sites with reasonable authority and crawl history. However, rendering is resource-intensive, so Google doesn't render every URL on every crawl pass. Low-priority pages, parameter URLs, and pages with poor crawl history may be rendered infrequently or not at all. For the most important pages on your site, verifying rendering via the URL Inspection tool in Search Console is more reliable than assuming Google will always render correctly.

Question 2

Is WordPress affected by JavaScript SEO issues?

Accepted Answer

Standard WordPress with classic themes is largely SEO-safe because the server returns fully rendered HTML. The risk appears with heavily JavaScript-dependent page builders (especially those that inject critical content via JS), custom React or Vue components embedded in WordPress pages, and headless WordPress setups where the frontend is a JavaScript framework consuming the WordPress REST API. If you're running a traditional WordPress theme with standard plugins, JavaScript rendering is unlikely to be a significant issue. If you've added significant custom JavaScript functionality or are running a headless setup, the rendering checks above apply.

Question 3

What's the fastest way to check if my site has rendering issues?

Accepted Answer

Open a key page in Chrome and right-click → View Page Source. Search the source for a piece of text you know appears on the page — your H1, a paragraph from the body, or a navigation link. If it's there, that content is in the server-side HTML and will be available to Google immediately. If it's not there, it's injected by JavaScript. As a second check, use the URL Inspection tool in Google Search Console → Test Live URL → View Rendered Page to see exactly what Google's renderer sees. Comparing the two gives you a clear picture of which content is at risk.

Question 4

Do other search engines handle JavaScript differently to Google?

Accepted Answer

Yes — Bing renders JavaScript but is generally considered less capable and less consistent than Google's renderer. Smaller crawlers (used by AI systems and third-party tools) often don't render JavaScript at all and rely entirely on server-side HTML. This means that content only available after JavaScript execution may be invisible to AI crawlers, link-checking tools, and social media scrapers (which generate preview cards). If you're targeting AI search visibility specifically, ensuring key content is present in server-side HTML is particularly important — AI systems that extract content from pages may not execute JavaScript before doing so.

Question 5

Will switching to SSR or SSG hurt my site's performance scores?

Accepted Answer

Generally the opposite — SSR and SSG typically improve Core Web Vitals, because the browser receives meaningful content sooner instead of waiting for JavaScript to download, parse, and execute before anything appears. SSG in particular tends to produce the fastest Largest Contentful Paint scores, since the HTML is already complete at request time. The main tradeoff is build complexity and, for SSR, server compute cost — not page speed, which usually improves.

Question 6

Can I mix rendering strategies across one site?

Accepted Answer

Yes, and most large sites do. A common pattern is SSG for marketing pages and blog content that rarely changes, SSR for product or category pages that update frequently, and CSR only for logged-in, non-indexable views like account dashboards. Next.js, Nuxt, and similar frameworks support this per-route, so the decision can be made page-type by page-type rather than as a single site-wide choice.