From 15661f3959b8014320ab6bfc670823859660faf1 Mon Sep 17 00:00:00 2001
From: Vladimir Levin <vmpstr@chromium.org>
Date: Wed, 1 Nov 2023 19:26:16 -0400
Subject: [PATCH 1/2] Add more checkVisibility dictinoary properties

---
 cssom-view-1/Overview.bs | 22 ++++++++++++++++++----
 1 file changed, 18 insertions(+), 4 deletions(-)

diff --git a/cssom-view-1/Overview.bs b/cssom-view-1/Overview.bs
index 9522d10b8b4..7da29df336b 100644
--- a/cssom-view-1/Overview.bs
+++ b/cssom-view-1/Overview.bs
@@ -1161,6 +1161,9 @@ dictionary ScrollIntoViewOptions : ScrollOptions {
 dictionary CheckVisibilityOptions {
     boolean checkOpacity = false;
     boolean checkVisibilityCSS = false;
+    boolean contentVisibilityAuto = false;
+    boolean opacityProperty = false;
+    boolean visibilityProperty = false;
 };
 
 partial interface Element {
@@ -1246,15 +1249,25 @@ Note: The {{DOMRect}} object returned by {{Element/getBoundingClientRect()}} is
     1. If an ancestor of |this| in the [=flat tree=]
         has ''content-visibility: hidden'',
         return false.
-    1. If the {{CheckVisibilityOptions/checkOpacity}} dictionary member of |options|
-        is true,
+    1. If either the {{CheckVisibilityOptions/checkOpacity}}
+        or the {{CheckVisibilityOptions/opacityProperty}}
+        dictionary members of |options|
+        are true,
         and |this|, or an ancestor of |this| in the [=flat tree=],
         has a computed 'opacity' value of ''0'',
         return false.
-    1. If the {{CheckVisibilityOptions/checkVisibilityCSS}} dictionary member of |options|
-        is true,
+    1. If either the {{CheckVisibilityOptions/checkVisibilityCSS}}
+        or the {{CheckVisibilityOptions/visibilityProperty}}
+        dictionary members of |options|
+        are true,
         and |this| is <l spec=css-display>[=invisible=]</l>,
         return false.
+    1. If the {{CheckVisibilityOptions/contentVisibilityAuto}} dictionary member of |options|
+        is true
+        and an ancestor of |this| in the [=flat tree=]
+        [=skips its contents=]
+        due to ''content-visibility: auto'',
+        return false.
     1. Return true.
 </div>
 
@@ -1984,6 +1997,7 @@ generally not listed.
 <h3 id='changes-from-2022-07-07' class=no-num>Changes From 07 July 2022</h3>
 * Introduced the {{VisualViewport}} API and related concepts
 * Pinch zoom is now renamed to <a>scale factor</a>
+* Added visibilityProperty, opacityProperty, and contentVisiblityAuto properties for {{Element/checkVisibility()}} method.
 
 <h3 id='changes-from-2022-06-22' class=no-num>Changes From 22 June 2022</h3>
 * Adam Argyle moved the <a event>scrollend</a> event from <a href="https://wicg.github.io/overscroll-scrollend-events/">WICG overscroll-scrollend-events</a> to [[CSSOM-VIEW-1]]

From 040e66779db706e8f3827fe462e05b3f127e38f3 Mon Sep 17 00:00:00 2001
From: Vladimir Levin <vmpstr@chromium.org>
Date: Mon, 6 Nov 2023 14:50:41 -0500
Subject: [PATCH 2/2] Update with note

---
 cssom-view-1/Overview.bs | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/cssom-view-1/Overview.bs b/cssom-view-1/Overview.bs
index 7da29df336b..23b99a691fa 100644
--- a/cssom-view-1/Overview.bs
+++ b/cssom-view-1/Overview.bs
@@ -1190,6 +1190,10 @@ partial interface Element {
 };
 </pre>
 
+Note: The {{CheckVisibilityOptions/checkOpacity}} and {{CheckVisibilityOptions/checkVisibilityCSS}} properties are historical names.
+These properties have aliases that match the new naming scheme,
+namely {{CheckVisibilityOptions/opacityProperty}} and {{CheckVisibilityOptions/visibilityProperty}}.
+
 The <dfn method for=Element>getClientRects()</dfn> method, when invoked, must return the result of the following algorithm:
 
 1. If the element on which it was invoked does not have an associated [=CSS/box=] return an empty {{DOMRectList}} object and stop this algorithm.
@@ -1249,15 +1253,15 @@ Note: The {{DOMRect}} object returned by {{Element/getBoundingClientRect()}} is
     1. If an ancestor of |this| in the [=flat tree=]
         has ''content-visibility: hidden'',
         return false.
-    1. If either the {{CheckVisibilityOptions/checkOpacity}}
-        or the {{CheckVisibilityOptions/opacityProperty}}
+    1. If either the {{CheckVisibilityOptions/opacityProperty}}
+        or the {{CheckVisibilityOptions/checkOpacity}}
         dictionary members of |options|
         are true,
         and |this|, or an ancestor of |this| in the [=flat tree=],
         has a computed 'opacity' value of ''0'',
         return false.
-    1. If either the {{CheckVisibilityOptions/checkVisibilityCSS}}
-        or the {{CheckVisibilityOptions/visibilityProperty}}
+    1. If either the {{CheckVisibilityOptions/visibilityProperty}}
+        or the {{CheckVisibilityOptions/checkVisibilityCSS}}
         dictionary members of |options|
         are true,
         and |this| is <l spec=css-display>[=invisible=]</l>,