While Googlebot can execute JavaScript, client-side rendering (CSR) introduces rendering queues, delayed indexing, and hydration failures that hurt organic search performance.
The 2-Wave Indexing Problem in Client-Side JavaScript
When Google crawls a pure Client-Side Rendered (CSR) application, it first indexes the raw initial HTML response (often an empty <div id="root"></div>). JavaScript rendering is deferred to a secondary wave when rendering compute becomes available—often days or weeks later.
The Solution: Server-Side Rendering (SSR) & Static Generation (SSG)
Modern frameworks like Next.js execute React components on the server or at build time, returning complete semantic HTML to crawlers on initial request while hydrating interactive elements client-side.
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