How does switching to Evergreen Chrome revolutionize Google's page rendering?

An evergreen browser updates automatically without user intervention. Until the migration announced by Martin Splitt, Google's Web Rendering Service was running on Chrome 41, a version released nearly a decade ago.<\/p>

This ancient version lacked ES6, fetch API, IntersectionObserver, and most modern web standards. As a result, sites built with recent frameworks (React, Vue, Angular) were only partially crawled—or not at all—unless tons of polyfills and Babel transpilation were added.<\/p>

With an up-to-date Chrome, Googlebot now natively interprets modern JavaScript syntax. Lazy loading via IntersectionObserver, ES modules, async/await, Web Components—everything that was previously ignored or poorly managed—is now executed correctly.<\/p>

Let’s be honest: this doesn’t mean Google indexes all your JS instantly. The rendering budget remains limited, as does execution timing. But at least, we are no longer battling against an engine that dates back to the prehistoric era of the web.<\/p>

The main reason? Stability and computational cost. Maintaining a frozen version avoided unexpected regressions during Chrome updates. But this choice created a huge gap between what developers deployed in production and what Googlebot actually saw.<\/p>

The shift to evergreen proves that Google has finally favored compatibility with modern web, even if it means managing the complexity of frequent updates. It’s a strong signal: the engine now assumes that sites use contemporary technologies.<\/p>

• Chrome 41 is from 2015 and only supported a fraction of modern APIs (no ES modules, no IntersectionObserver, no native fetch).<\/li>
• Evergreen Chrome means that the WRS updates automatically at the pace of stable Chrome releases (~6 weeks).<\/li>
• This migration mainly improves the rendering of Single Page Applications and modern frameworks (React, Vue, Svelte).<\/li>
• The rendering budget and JS execution times remain constraints—it’s not a free pass to ship 5 MB of JavaScript.<\/li>
• Google has developed a sustainable strategy to follow Chrome updates without breaking crawling with each version.<\/li><\/ul>

Yes, and it’s one of the rare Google announcements whose impact has been immediately measurable. Since the migration, testing with the URL inspection tool shows that the rendered DOM aligns much better with rendering in a traditional browser.<\/p>

Modern frameworks (Next.js, Nuxt) are now crawled without requiring systematic SSR. But be careful: this does not exempt you from optimizing JS execution time. If your hydration takes 8 seconds, Googlebot may very well leave before critical content is visible.<\/p>

The first nuance is that evergreen does not mean unlimited. The rendering budget still exists. Google continues to prioritize resources: a site with 500 parallel JS requests will not be treated with the same patience as an optimized page.<\/p>

Furthermore, not all sites benefit from this migration equally. If your stack is in jQuery or static HTML, you won’t see any difference. This improvement mainly concerns SPA and JAMstack architectures that suffered from the limitations of Chrome 41. [To be verified]: Google has never published precise statistics on the proportion of sites actually affected.<\/p>

Transitioning to evergreen Chrome does not fix design flaws. If your site loads critical content through user events (onclick, hover), Googlebot will not simulate them any more than before. The rendering remains passive.<\/p>

Similarly, content loaded after a poorly implemented endless scroll or requiring interaction remains invisible. And if your JS crashes or times out, it doesn’t matter that the engine is modern: Google will index an empty page. The migration improves compatibility, but it does not absolve bad practices.<\/p>