diff --git a/source b/source
index 1b9a587a1af..dc4bbfd098b 100644
--- a/source
+++ b/source
@@ -59698,8 +59698,8 @@ interface <dfn interface>HTMLDialogElement</dfn> : <span>HTMLElement</span> {
   and a boolean <var>isModal</var>, are as follows:</p>
 
   <ol>
-   <li><p>Run <span data-x="hide-all-popovers-until">hide all popovers until</span> given null,
-   false, and true.</p></li>
+   <li><p>Run <span>hide all popovers</span> given <var>subject</var>'s <span>node
+   document</span>.</p></li>
 
    <li><p>Let <var>control</var> be null.</p></li>
 
@@ -81489,14 +81489,16 @@ dictionary <dfn dictionary>DragEventInit</dfn> : <span>MouseEventInit</span> {
   must <span>reflect</span> the <span data-x="attr-popover">popover</span> attribute, <span>limited
   to only known values</span>.</p>
 
-  <p>Every <span data-x="HTML elements">HTML element</span> has a <dfn>popover visibility
+  <p>Every <span data-x="HTML elements">HTML element</span> has a <dfn export>popover visibility
   state</dfn>, initially <span data-x="popover-hidden-state">hidden</span>, with these potential
   values:</p>
 
   <ul>
-   <li><p><dfn data-x="popover-hidden-state">hidden</dfn></p></li>
+   <li><p><dfn export for="popover visibility state"
+   data-x="popover-hidden-state">hidden</dfn></p></li>
 
-   <li><p><dfn data-x="popover-showing-state">showing</dfn></p></li>
+   <li><p><dfn export for="popover visibility state"
+   data-x="popover-showing-state">showing</dfn></p></li>
   </ul>
 
   <p>The <code>Document</code> has an <dfn>auto popover list</dfn>, which is a <span>list</span>,
@@ -81622,6 +81624,9 @@ dictionary <dfn dictionary>DragEventInit</dfn> : <span>MouseEventInit</span> {
      <li><p>Let <var>ancestor</var> be the result of running the <span>topmost popover
      ancestor</span> algorithm given <var>element</var>.</p></li>
 
+     <li><p>If <var>ancestor</var> is null, then set <var>ancestor</var> to
+     <var>document</var>.</p></li>
+
      <li><p>Run <span data-x="hide-all-popovers-until">hide all popovers until</span> given
      <var>ancestor</var>, false, and true.</p></li>
 
@@ -81840,7 +81845,7 @@ dictionary <dfn dictionary>DragEventInit</dfn> : <span>MouseEventInit</span> {
   </ol>
 
   <p>To <dfn data-x="hide-all-popovers-until">hide all popovers until</dfn>, given an <span
-  data-x="HTML elements">HTML element</span> <var>endpoint</var>, a boolean
+  data-x="HTML elements">HTML element</span> or <code>Document</code> <var>endpoint</var>, a boolean
   <var>focusPreviousElement</var>, and a boolean <var>fireEvents</var>:</p>
 
   <ol>
@@ -81907,6 +81912,10 @@ dictionary <dfn dictionary>DragEventInit</dfn> : <span>MouseEventInit</span> {
   happens. For example, during light-dismiss of a popover, this algorithm ensures that we close only
   the popovers that aren't related to the node clicked by the user.</p>
 
+  <p>To <dfn export>hide all popovers</dfn>, given a <code>Document</code> <var>document</var>, run
+  <span data-x="hide-all-popovers-until">hide all popovers until</span> given <var>document</var>,
+  false, and false.</p>
+
   <p>To find the <dfn>topmost popover ancestor</dfn>, given a <code>Node</code>
   <var>newPopover</var>, perform the following steps. They return an <span data-x="HTML
   elements">HTML element</span> or null.</p>
@@ -82304,6 +82313,9 @@ dictionary <dfn dictionary>DragEventInit</dfn> : <span>MouseEventInit</span> {
 
      <li><p>Set <var>document</var>'s <span>popover pointerdown target</span> to null.</p></li>
 
+     <li><p>If <var>ancestor</var> is null, then set <var>ancestor</var> to
+     <var>document</var>.</p></li>
+
      <li><p>If <var>sameTarget</var> is true, then run <span data-x="hide-all-popovers-until">hide
      all popovers until</span> given <var>ancestor</var>, false, and true.</p></li>
     </ol>