The new No-Vary-Search header can be used to tell browsers that a query string like ?product_id=7 means the content on that URL is unique based on the query parameter, so cache pages like that individually. But also that a query string like ?utm_source=frontendmasters does not have unique content, so don’t cache it individually. (As explained by Harry Roberts)
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Managing Anchor Associations With Data Attributes and Advanced attr()
There is no `anchor` attribute in HTML, it was decided CSS `anchor-name` / `position-anchor` was the way to go. But modern CSS functions can get us there anyway.