SEORendering strategy là yếu tố critical ảnh hưởng khả năng Google index content — CSR là rủi ro cao nhất, SSR/SSG an toàn nhất.
CSR (Client-Side Rendering): HTML ban đầu trống, JS render content → Google phải chờ JS execute (second wave indexing). Rủi ro: Googlebot có thể timeout, content không index đầy đủ, crawl budget lãng phí.
SSR (Server-Side Rendering): HTML đầy đủ từ server → Google index ngay lập tức, tốt nhất cho SEO.
SSG (Static Site Generation): HTML pre-built → nhanh nhất, SEO tuyệt vời cho content tĩnh.
Google crawl SPA: Googlebot dùng Chromium headless, render JS rồi mới index — nhưng có hàng đợi dài (render queue), có thể mất vài ngày đến vài tuần. Nếu bắt buộc CSR: đảm bảo critical content trong initial HTML, dùng dynamic rendering cho bot.
Rendering strategy is a critical factor in whether Google can index your content — CSR carries the highest risk, SSR/SSG are the safest choices.
CSR (Client-Side Rendering): The initial HTML is essentially empty; JS renders the content — Google must wait for JS to execute (second-wave indexing). Risks: Googlebot may time out, content may not be fully indexed, and crawl budget is wasted.
SSR (Server-Side Rendering): Fully-rendered HTML is delivered from the server — Google can index it immediately; this is the best approach for SEO.
SSG (Static Site Generation): HTML is pre-built — the fastest option and excellent for SEO with static content.
Google crawling SPAs: Googlebot uses headless Chromium to render JS before indexing — but there is a long render queue, and indexing can take days or even weeks. If CSR is unavoidable: ensure critical content is in the initial HTML and use dynamic rendering for bots.