v150 · CSS · Security

Modifier Builder

Configure cross-origin(), integrity(), and referrer-policy() request modifiers for a CSS url() value and see the generated syntax. Switch between background-image, @font-face src, and @import contexts.

Checking CSS URL request modifier support…

URL:

cross-origin()

integrity()

referrer-policy()

Property:

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Generated CSS has not been validated yet.

modifier	values	effect
cross-origin(anonymous)	anonymous, use-credentials	Sets CORS mode for the request. anonymous sends no credentials; use-credentials includes cookies and TLS certs.
integrity("sha256-…")	SRI hash string	Browser verifies the resource hash before using it — same as the HTML integrity= attribute. Mismatches block the resource.
referrer-policy(no-referrer)	any Referrer-Policy value	Controls the Referer header sent with the CSS resource fetch. Useful for CDN privacy or hiding the embedding page URL.

references

implementation reference

Need the exact API surface, compatibility boundaries, errors, lifecycle, and source links? Read the matching gendn reference ↗