Update

Author: vmpstr

css-view-transitions-1/Overview.bs

@@ -743,7 +743,7 @@ The {{ViewTransition/domUpdated}} [=getter steps=] are to return [=this's=] [=Vi
 
             Note: This happens if |transition| was [=skip the page transition|skipped=] before this point.
 
-        1. If it is not null, [=Call the DOM update callback=] of |transition|. Otherwise, treat |transition|'s [=ViewTransition/DOM updated promise] in subsequent steps as resolved.
+        1. [=Call the DOM update callback=] of |transition|.
 
         1. [=promise/React=] to |transition|'s [=ViewTransition/DOM updated promise=]:
 
@@ -830,7 +830,7 @@ The {{ViewTransition/domUpdated}} [=getter steps=] are to return [=this's=] [=Vi
 
     1. [=Assert=]: |transition|'s [=ViewTransition/phase=] is not "`done`".
 
-    1. If |transition|'s [=ViewTransition/phase=] is [=phases/before=] "`dom-update-callback-called`", then [=call the DOM update callback=] of |transition| if it is not null.
+    1. If |transition|'s [=ViewTransition/phase=] is [=phases/before=] "`dom-update-callback-called`", then [=call the DOM update callback=] of |transition|.
 
     1. Set [=document/transition suppressing rendering=] to false.
 
@@ -1117,13 +1117,17 @@ The {{ViewTransition/domUpdated}} [=getter steps=] are to return [=this's=] [=Vi
 
     1. [=Assert=]: |transition|'s [=ViewTransition/phase=] is [=phases/before=] "`dom-update-callback-called`".
 
-    1. Let |callbackPromise| be the result of [=/invoking=] |transition|'s [=ViewTransition/DOM update callback=].
+    1. Consider |transition|'s [=ViewTransition/DOM update callback=]:
+
+        * If it is null, then resolve |callbackPromise|.
+
+        * Otherwise, let |callbackPromise| be the result of [=/invoking=] |transition|'s [=ViewTransition/DOM update callback=].
 
     1. Set |transition|'s [=ViewTransition/phase=] to "`dom-update-callback-called`".
 
     1. [=promise/React=] to |callbackPromise|:
 
-        * If |callbackPromise| was fulfilled, then [=resolve=] |transition|'s [=ViewTransition/DOM updated promise=].
+        * If |callbackPromise| was resolved, then [=resolve=] |transition|'s [=ViewTransition/DOM updated promise=].
 
         * If |callbackPromise| was rejected with reason |r|, then [=reject=] |transition|'s [=ViewTransition/DOM updated promise=] with |r|.