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Official statement

Deferring the loading of non-critical JavaScript until the first user interaction does not affect SEO, provided that the main content remains visible for indexing. Googlebot does not interact with the page through clicks; it only needs visible content.
🎥 Source video

Extracted from a Google Search Central video

💬 EN 📅 23/10/2021 ✂ 24 statements
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✂ Other statements from this video 23 ▾
  1. □ Are Core Web Vitals really a universal ranking factor for every site?
  2. □ Does using data-src really enhance your lazy loading images?
  3. □ Why doesn't the visual quality of images impact traditional SEO?
  4. □ Do App Store reviews really impact your web SEO?
  5. □ How does Google determine your daily crawl rate and what does it mean for your SEO?
  6. □ Are 5XX errors really more damaging than 404 errors for SEO?
  7. □ Why doesn’t the crawl rate bounce back instantly after a technical fix?
  8. □ How does Google actually identify soft 404s?
  9. □ How does Google leverage URL parameters to determine the canonical version?
  10. □ Does scraping really distort impressions in Search Console?
  11. □ How do internal links truly influence your SEO strategy?
  12. □ Why are Technical SEO and Quality Content Inextricably Linked?
  13. □ How long does it really take for Core Web Vitals to impact your rankings?
  14. □ Should you rely on a single trust score for SEO?
  15. □ Should You Keep URLs Indexable for Temporarily Out of Stock Products?
  16. □ How Does a Link from the Homepage Speed Up Reindexing?
  17. □ Do JavaScript vulnerabilities flagged by Lighthouse really affect your SEO?
  18. □ Does the importance of the author change depending on the type of content?
  19. □ Is using nofollow on internal links really unnecessary for PageRank?
  20. □ Is Content Really the Only Factor in Site Classification?
  21. □ Is Infinite Scrolling Changing Our SEO Strategy for Good?
  22. □ Should you really aim for a server response time under 200 ms for SEO?
  23. □ What causes your FAQ rich results to vanish after a redesign?
📅
Official statement from (4 years ago)
TL;DR

Deferring non-critical JavaScript does not harm SEO as long as the main content remains visible. Googlebot doesn't interact with clicks, so indexing relies on the initially loaded content.

❓ Frequently Asked Questions

Le JavaScript différé affecte-t-il le crawl de Googlebot ?
Non, tant que le contenu principal est visible dès le chargement initial, le crawl reste intact.
Comment tester l'impact de mon JavaScript différé ?
Utilisez des outils comme Fetch as Google, PageSpeed Insights et Visualiser dans Webmaster Tools.
Dois-je toujours éviter d'utiliser JavaScript pour le SEO ?
Pas nécessairement. Utilisez JavaScript différemment, mais assurez-vous que le contenu essentiel reste exposé pour l'indexation par Googlebot.
🏷 Related Topics
Domain Age & History Content Crawl & Indexing JavaScript & Technical SEO

🎥 From the same video 23

Other SEO insights extracted from this same Google Search Central video · published on 23/10/2021

🎥 Watch the full video on YouTube →

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