JavaScript SEO
JavaScript SEO is the specialism of ensuring client-side rendered pages (SPAs, React, Vue) are correctly crawled and indexed by search engines.
Google renders JavaScript, but with delay and conditions. Problematic: important content (titles, links, meta) that only appears after JS execution. Solutions: server-side rendering (SSR), static site generation (SSG), or hybrid rendering. Frameworks like Next.js, Astro, Nuxt and SvelteKit make this standard. For SEO on SPAs: at minimum render the HTML head server-side.
Example
A React SPA renders all content client-side. Googlebot sees empty HTML on initial fetch; after JS execution the meta title and H1 appear. Migration to Next.js with SSR fixes this.
Frequently asked questions
Does Google index all JavaScript content?
Usually yes, via the Web Rendering Service. But: crawl budget is more limited for JS-heavy sites and JS errors can block indexing.
Related terms
Further reading
- → Our service: SEO