Crawler Hints Update: Cloudflare Supports IndexNow and Announces General Availability

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Hi.
Sounds great!
How exactly does Cloudflare know that page has changed? Will it work also for SPAs?
Thank you.

The article linked to this blog post that explains change detection:

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Thank you, I have read the article, but statement

That’s where Cloudflare comes in. We see what pages our customers are serving, we know which ones have changed (either by hash value or timestamp) and so can automatically build a complete record of when and which pages have changed.

is rather vague. And does not answer SPA question at all.

sounds like exactly the same way they determine if an asset is cached or not?

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