Official statement
During crawling, Google only downloads the HTML. JavaScript resources are not downloaded at this stage. Later, during rendering, Google loads the page like a browser, downloads CSS, JavaScript, and makes the necessary API calls.
Other statements from this video 13 ▾
- □ Is hidden content truly visible to Google?
- □ Do Google’s third-party tools really impact your SEO?
- □ Why Have #! Fragments Become a No-Go for SEO?
- □ Does JavaScript Really Affect Crawlability?
- □ How Are JavaScript Resource Requests Impacting Your Crawl Budget?
- □ Does blocking the main thread really impact SEO?
- □ Could JavaScript harm your SEO the way Flash did?
- □ Is it possible to avoid cloaking with localized user experiences?
- □ Could using URL fragments for JavaScript modals actually boost your SEO?
- □ Why should you steer clear of inline JavaScript for large SEO scripts?
- □ Is it true that the canonical tag is often overlooked by Google?
- □ Does AMP really affect your website's SEO?
- □ Why is page speed essential for SEO rankings?
Official statement from
(5 years ago)
⚠ A more recent statement exists on this topic
Does Google Merchant Center crawling count against your SEO crawl budget?
View statement →
TL;DR
Google separates crawling and rendering. Initially, it only downloads the HTML. Later, during rendering, it processes JavaScript and CSS. This directly affects how your pages are interpreted by the search engine.
❓ Frequently Asked Questions
Pourquoi séparer le crawl du rendu ?
Pour gérer efficacement les ressources. Google optimise son traitement en deux temps pour identifier les contenus critiques.
Quel est le principal impact de cette séparation pour le SEO ?
Les contenus JavaScript peuvent être retardés ou manqués à l'indexation initiale, d'où l'importance d'un HTML bien structuré.
Quelles solutions pour les contenus JS ?
Utilisez le rendu côté serveur ou assurez-vous que le contenu JS critique soit également en HTML.
🎥 From the same video 13
Other SEO insights extracted from this same Google Search Central video · published on 26/05/2021
🎥 Watch the full video on YouTube →
💬 Comments (0)
Be the first to comment.