Official statement
FID issues are linked to JavaScript running on the page. All code executes on the same thread by default, so the browser can only do one thing at a time. Any code that takes longer to run blocks everything else, including user actions.
Other statements from this video 13 ▾
- □ Why is First Input Delay essential for technical SEO?
- □ How do individual URLs truly impact Page Experience and SEO?
- □ How do FID scores from the Chrome UX Report impact your SEO?
- □ How can you access FID data via Search Console to enhance your SEO strategy?
- □ How can PageSpeed Insights transform your SEO strategy?
- □ Why does a URL need to be online for at least a month to be included in the CrUX Report?
- □ Do Core Web Vitals really lack success thresholds?
- □ Is it true that a FID under 100ms can enhance user experience for most visitors?
- □ Is it possible for FID to be non-existent without user engagement?
- □ How can you effectively measure FID on new pages?
- □ Why should you optimize JavaScript for SEO?
- □ What SEO benefits can you gain by using async and defer attributes on your scripts?
- □ Are You Splitting Your Tasks to Enhance FID?
Official statement from
(5 years ago)
⚠ A more recent statement exists on this topic
Why is First Input Delay so challenging to measure in a lab setting?
View statement →
TL;DR
FID issues arise from JavaScript blocking the browser's main thread. By reducing, delaying, or removing JS, you enhance page interactivity. For SEO, this means prioritizing user experience.
❓ Frequently Asked Questions
Qu'est-ce qu'un bon score de FID ?
Google recommande un FID inférieur à 100 ms pour une expérience utilisateur optimale.
Puis-je simplement supprimer tout mon JavaScript ?
Non, car le JavaScript est souvent nécessaire pour des fonctionnalités critiques. Le but est d'optimiser, non d'éliminer indiscriminément.
Comment prioriser les scripts JavaScript ?
Classez-les par importance et impact sur l'utilisateur, puis chargez d'abord ceux qui affectent directement l'interaction utilisateur.
🎥 From the same video 13
Other SEO insights extracted from this same Google Search Central video · published on 21/09/2021
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