From 83c919215b3f7ef8039c881dc41a97ad5b0d8251 Mon Sep 17 00:00:00 2001
From: Benjamin VanderSloot <bvandersloot@mozilla.com>
Date: Mon, 3 Feb 2025 10:38:40 -0500
Subject: [PATCH] Pass a top-level navigation initiator origin to Fetch

This helps with the HTTP WG's layered cookies draft integration work. https://github.com/whatwg/fetch/pull/1807 depends on this state being passed in so we can define SameSite=Strict properly.
---
 source | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/source b/source
index 8b57cd139a4..f44d8a32d1e 100644
--- a/source
+++ b/source
@@ -2707,6 +2707,7 @@ a.setAttribute('href', 'https://example.com/'); // change the content attribute
        <li><dfn data-x="concept-request-initiator-type" data-x-href="https://fetch.spec.whatwg.org/#request-initiator-type">initiator type</dfn></li>
        <li><dfn data-x="concept-request-service-workers-mode" data-x-href="https://fetch.spec.whatwg.org/#request-service-workers-mode">service-workers mode</dfn></li>
        <li><dfn data-x="concept-request-traversable-for-user-prompts" data-x-href="https://fetch.spec.whatwg.org/#concept-request-window">traversable for user prompts</dfn></li>
+       <li><dfn data-x="concept-request-top-level-navigation-initiator-origin" data-x-href="https://fetch.spec.whatwg.org/#request-top-level-navigation-initiator-origin">top-level navigation initiator origin</dfn></li>
        <li><dfn data-x-href="https://fetch.spec.whatwg.org/#concept-request-add-range-header">add a range header</dfn></li>
       </ul>
      </li>
@@ -103476,6 +103477,12 @@ location.href = '#foo';</code></pre>
     </dl>
    </li>
 
+   <li><p>If <var>navigable</var> is a <span>top-level traversable</span>, then set
+   <var>request</var>'s <span
+   data-x="concept-request-top-level-navigation-initiator-origin">top-level navigation initiator
+   origin</span> to <var>entry</var>'s <span data-x="she-document-state">document state</span>'s
+   <span data-x="document-state-initiator-origin">initiator origin</span></p></li>
+
    <li>
     <p>If <var>request</var>'s <span data-x="concept-request-client">client</span> is null:</p>