demo · v134

expect-no-linked-resources

A Document-Policy that asserts the document declares zero <link rel=...> subresources. Useful for hardened embeds where the absence of linked-prefetch / preload / DNS-prefetch reduces fingerprinting surface and ad-tech surprises. This page scans itself and reports the violation count.

probing Document-Policy: expect-no-linked-resources...

Try it

click "scan this document"

The code

# server response header on the embed:
Document-Policy: expect-no-linked-resources

# Or via meta:
<meta http-equiv="Document-Policy"
      content="expect-no-linked-resources">

# Any <link rel="..."> that fetches a subresource
# (preload, prefetch, dns-prefetch, modulepreload, etc.)
# becomes a policy violation, reported via the
# Reporting API.

see also