Cross-document View Transitions are Limited Availability — Chrome/Edge 126+, Safari 18.2+, Firefox not yet shipped

reference·Scope: business·Status: current

Created 2026-05-22

Claim: Cross-document View Transitions (@view-transition { navigation: auto; }) are Limited Availability as of May 2026.

Verbatim (MDN @view-transition page, updated April 20, 2026): "This feature is not Baseline because it does not work in some of the most widely-used browsers."

Support: Chrome 126+, Edge 126+, Safari 18.2+; Firefox has not shipped.

Confidence: Verified.

Pattern: literally one CSS rule, degrades gracefully. Adopt as progressive enhancement on every Astro/multi-page site.

Perf caveat (Web Perf Clinic 2026 RUM data): cross-document view transitions add ~70ms to LCP on repeat mobile pageviews. Mitigation: pair with Speculation Rules with eagerness:"moderate" is the 2026 default for instant navigation; ~82% LCP improvement in CoreDash field data so the prerendered page's LCP element is already painted.

Conflicting source note: Some third-party guides still claim Safari has not shipped cross-document VTs; MDN, web.dev, CSS-Tricks, and RUMVision confirm Safari 18.2+ has shipped support. Treat MDN/web.dev as authoritative.

Depends on

reference Same-document View Transitions became Baseline Newly Available on October 14, 2025 (Firefox 144)

reference Speculation Rules with eagerness:"moderate" is the 2026 default for instant navigation; ~82% LCP improvement in CoreDash field data

Depends on

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