Official statement
You should not inline large amounts of JavaScript because it prevents caching. External JavaScript files can be cached and are only downloaded occasionally, unlike inline code which must be downloaded every time.
Other statements from this video 13 ▾
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- □ Do Google’s third-party tools really impact your SEO?
- □ Why Have #! Fragments Become a No-Go for SEO?
- □ Does JavaScript Really Affect Crawlability?
- □ Why does Google render after crawling?
- □ 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?
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- □ 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
Do third-party scripts really slow down your SEO performance?
View statement →
TL;DR
Avoid inlining large JavaScript scripts. It prevents caching, which increases loading times. Instead, use external files.
🎥 From the same video 13
Other SEO insights extracted from this same Google Search Central video · published on 26/05/2021
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