Official statement
Other statements from this video 12 ▾
- 10:15 Les Core Web Vitals mesurent-ils vraiment les chargements consécutifs ou juste la première visite ?
- 22:39 Faut-il supprimer les liens présents uniquement dans le HTML initial ?
- 60:22 Le Server-Side Rendering est-il vraiment indispensable pour le SEO en 2025 ?
- 76:24 Le JSON d'hydratation en bas de page nuit-il au SEO ?
- 121:54 Googlebot est-il vraiment devenu infaillible face à JavaScript ?
- 152:49 Pourquoi le passage à Evergreen Chrome transforme-t-il le rendu des pages par Google ?
- 196:12 Pourquoi Google ne clique-t-il jamais sur vos boutons Load More et comment l'éviter ?
- 226:28 Faut-il vraiment masquer le contenu cumulatif des paginations infinies à Google ?
- 251:03 Peut-on vraiment servir une navigation différente à Google sans risquer une pénalité pour cloaking ?
- 271:04 Googlebot clique-t-il vraiment sur les boutons et liens JavaScript de votre site ?
- 303:17 Faut-il créer une page par jour pour un événement multi-jours ou canoniser vers une page unique ?
- 402:37 Le JavaScript est-il vraiment compatible avec le SEO moderne ?
Google claims to almost systematically render all pages, whether the code is in pure HTML or generated by JavaScript. The heuristics that avoid rendering concern a negligible portion of the web. For SEOs, this means that JS frameworks are no longer a technical barrier, but performance and latency issues remain crucial for indexing and ranking.
What you need to understand
What does Google mean by "systematic rendering"? <\/h3>
Martin Splitt states that Google now almost renders all web pages<\/strong>, even those where the initial HTML is empty or minimal and requires JavaScript execution to display the content. The engine no longer relies solely on the raw HTML returned by the server — it executes the JS to obtain the final DOM. It is this rendered DOM that is analyzed for indexing and ranking.<\/p> This statement breaks a widespread belief: that Google might have a blacklist of JavaScript patterns that it ignores or that there exists a "crawl budget rendering" that limits processing of SPAs. According to Splitt, the workarounds heuristics are marginal<\/strong> and affect less than 0.1% of web pages. Specifically, a React, Vue, or Angular site is as likely to be rendered as a standard WordPress site.<\/p> Google does not publicly detail the rare cases where rendering is skipped. The only confirmed situations concern clearly empty pages<\/strong> (the In practice, rendering is not conditioned by the site's popularity<\/strong>, nor by the type of framework used, nor by a "JS quality score". If the initial HTML contains a valid minimal structure and the JavaScript executes without blocking indefinitely, Google will render the page. The real issue is not "does Google render my page?", but "how long does it take to render, and what content does it find afterwards?"<\/p> For years, the prevailing advice was to avoid client-side JavaScript for SEO, or at least to implement server-side rendering (SSR)<\/strong> or pre-rendering<\/strong>. This recommendation was based on the assumption that Googlebot did not systematically render pages, or that it did so with such a delay that indexing would be compromised.<\/p> If Splitt's statement is accurate, then JS frameworks are no longer a technical handicap by nature<\/strong>. A pure client-side rendering (CSR) site can be crawled, rendered, and indexed just as well as a static HTML site. This doesn’t mean that all technical choices are equal — performance remains a critical factor — but it removes the irrational fear of JavaScript itself.<\/p>What triggers or prevents the rendering of a page? <\/h3>
<body><\/code> tags without exploitable content), critical HTTP errors (404, 500), or severe network timeouts. If a page loads too slowly, the bot may stop rendering, but this is not an algorithmic decision — it’s an infrastructure constraint.<\/p>Why is this statement important for SEO practitioners? <\/h3>
SEO Expert opinion
Does this statement align with field observations? <\/h3>
Overall, yes. Rendering tests via Google Search Console and tools like Screaming Frog in JavaScript mode<\/strong> show that Googlebot indeed renders the majority of modern JS pages. Properly configured React or Vue sites are indexing correctly. But beware: "rendering" does not mean "instant indexing". [To be verified]<\/strong> The time between the initial crawl and complete rendering can vary from a few seconds to several days, especially for sites with low authority.<\/p> It is also important to distinguish rendering from understanding<\/strong>. Google can execute JavaScript and obtain a DOM, but if that DOM contains poorly structured tags, late-generated Splitt speaks of systematic rendering, but he does not specify frequency<\/strong>, latency<\/strong>, or depth<\/strong>. A site may be rendered once a month, with a timeout after 5 seconds, and without following dynamically added links in the DOM. This is technically "rendered", but practically, it is insufficient for competitive SEO. [To be verified]<\/strong> Sites with a high crawl budget probably benefit from more frequent and tolerant rendering compared to new or poorly linked sites.<\/p> Moreover, rendering does not imply equal treatment<\/strong>. A static HTML page is crawled, analyzed, and indexed in milliseconds. A JS page requires fetching the HTML, fetching the JS bundles, executing them, then analyzing the final DOM — which can take several seconds. If two identically contented pages are published, one in pure HTML and the other in CSR, the former will be indexed faster. This is not a penalty; it's an infrastructure cost.<\/p> The "very limited heuristics" mentioned by Splitt likely concern empty pages after rendering<\/strong>, blocking JavaScript errors<\/strong> (which completely prevent display), and network timeouts<\/strong>. If a site loads 10 MB of JS, takes 15 seconds to become interactive, and Googlebot stops execution at 5 seconds, the page will be considered empty or incomplete — hence not indexed, or indexed with the partially available content at t=5s.<\/p> Another critical case: content loaded after user interaction<\/strong> (clicks, infinite scroll, poorly implemented lazy loading). Google does not simulate clicks or scrolls — if content appears only after a manual JS event, it will never be seen by the bot. Splitt does not classify these cases as "exceptions to rendering", but in practice, they produce the same result: invisible content for Google.<\/p><title><\/code> tags, or content loaded via fetch() after several seconds, the bot may index an incomplete or truncated version. The "marginal heuristics" referred to by Splitt do not cover these cases — these are not rendering exceptions; they are failures of partial rendering.<\/p>What nuances should be added to this statement? <\/h3>
In what cases does this rule not apply? <\/h3>
Practical impact and recommendations
What concrete actions should you take if your site uses JavaScript? <\/h3>
Ensure that critical content is visible after rendering<\/strong>. Use the URL inspection tool in Google Search Console to compare the initial HTML and the rendered HTML. If Next, optimize Time to First Byte (TTFB) and JS execution time<\/strong>. Google expects a few seconds, not minutes. An unoptimized 2 MB JS bundle, with dozens of cascading network requests, can exceed the timeout. Use code splitting, lazy loading of non-critical modules, and a performant CDN. Systematic rendering does not exempt you from performance — it makes it even more critical.<\/p> Do not rely on the idea that "Google renders everything so I can do anything". A slow JS site will be crawled less often<\/strong>, rendered partially, and penalized on Core Web Vitals. Systematic rendering does not compensate for a failing technical architecture. If your SPA takes 8 seconds to display the main content, you will lose in SEO, even if Google eventually renders the page.<\/p> Another frequent mistake: hiding content behind interactions<\/strong> (accordions closed by default, tabs not visible on load, infinite scroll without fallback). Google does not click, does not scroll. If content exists only after a user click, it is invisible to the bot. Prefer HTML structures accessible by default, even if you enhance them later via JS.<\/p> Three tools are essential. First, Google Search Console<\/strong> — the "URL Inspection" section, "Rendered HTML" tab. Compare the source HTML and the rendered HTML for each type of page (home, category, product, article). If the rendering is identical to the source, your JS is executing correctly. If differences appear, check that they are intentional.<\/p> Next, Screaming Frog in JavaScript mode<\/strong> (Settings > Spider > Rendering). Crawl your site with rendering enabled, and compare the results with a regular crawl. Identify pages that lose content, internal links, or important tags between the two modes. Finally, Google PageSpeed Insights<\/strong> gives you a summary view of the actual rendering time and Core Web Vitals. If LCP exceeds 2.5 seconds, you have a performance issue that will impact indexing, even if Google renders the page.<\/p><h1><\/code>, <title><\/code>, or key paragraphs only appear after rendering, that’s normal — but make sure they do appear. If the tool shows an empty or incomplete DOM, it is a warning signal.<\/p>What mistakes should you absolutely avoid? <\/h3>
How can you check if your site is rendered correctly by Google? <\/h3>
❓ Frequently Asked Questions
Google rend-il les pages JavaScript aussi vite que les pages HTML statiques ?
Les sites en client-side rendering (CSR) sont-ils désavantagés par rapport au server-side rendering (SSR) ?
Quelles sont les "heuristiques" qui évitent le rendering selon Google ?
Un contenu chargé en lazy loading après scroll est-il visible par Google ?
Comment savoir si mon site est correctement rendu par Googlebot ?
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