Merge pull request #500 from nidhijaju/bfcache-wt-interaction

Specify BFCache interaction

index.bs

@@ -1097,8 +1097,13 @@ This specification defines [=unloading document cleanup steps=] as the following
 
 1. Let |window| be |document|'s [=relevant global object=].
 1. For each {{WebTransport}} |transport| whose [=relevant global object=] is |window|:
-  1. If |transport|.{{[[State]]}} is `"connected"`, set |transport|.{{[[State]]}} to `"failed"`
-     and [=session/terminate=] |transport|.{{[[Session]]}} [=in parallel=].
+  1. If |transport|.{{[[State]]}} is `"connected"`, then:
+    1. Set |transport|.{{[[State]]}} to `"failed"`.
+    1. [=In parallel=], [=session/terminate=] |transport|.{{[[Session]]}}.
+    1. [=Queue a network task=] with |transport| to run the following steps:
+      1. Let |error| be a newly [=DOMException/created=] {{WebTransportError}} whose
+         {{WebTransportErrorOptions/source}} is `"session"`.
+      1. [=Cleanup=] |transport| with |error|.
   1. If |transport|.{{[[State]]}} is `"connecting"`, set |transport|.{{[[State]]}} to
      `"failed"`.