change to allowReturnToOpener

spec.bs

@@ -114,7 +114,7 @@ interface DocumentPictureInPicture : EventTarget {
 dictionary DocumentPictureInPictureOptions {
   [EnforceRange] unsigned long long width = 0;
   [EnforceRange] unsigned long long height = 0;
-  boolean allowReturnToTab = true;
+  boolean allowReturnToOpener = true;
 };
 
 [Exposed=Window, SecureContext]
@@ -219,18 +219,18 @@ problems.
         window such that the distance between the top and bottom edges of the
         viewport are |options|["{{DocumentPictureInPictureOptions/height}}"]
         pixels.
-14. If |options|["{{DocumentPictureInPictureOptions/allowReturnToTab}}"] exists
+14. If |options|["{{DocumentPictureInPictureOptions/allowReturnToOpener}}"] exists
     and is <code>false</code>, the user agent should not display UI affordances
     on the picture-in-picture window that allow the user to return to the
     opener window.
 
 <p class="note">
 For both video and document picture-in-picture, user agents often display a
-button for the user to return to the original tab and close the
-picture-in-picture window. While this actino makes sense in most cases
+button for the user to return to the original page and close the
+picture-in-picture window. While this action makes sense in most cases
 (especially for a video picture-in-picture window that returns the video to the
 main document), it does not always make sense for document picture-in-picture
-windows. {{DocumentPictureInPictureOptions/allowReturnToTab}} is a hint to the
+windows. {{DocumentPictureInPictureOptions/allowReturnToOpener}} is a hint to the
 user agent from the website as to whether that action makes sense for their
 particular document picture-in-picture experience.
 </p>
@@ -657,16 +657,16 @@ content in question inside the PiP window:
 }
 </pre>
 
-## Hide return-to-tab button ## {#example-hide-return-to-tab}
+## Hide return-to-opener button ## {#example-hide-return-to-opener}
 
 While user agents often display a button on their video and document
-picture-in-picture windows to return to the original tab and close the window,
+picture-in-picture windows to return to the opener and close the window,
 this button doesn't always make sense for some websites' document
 picture-in-picture experience. Use the
-{{DocumentPictureInPictureOptions/allowReturnToTab}} option to hide the button.
+{{DocumentPictureInPictureOptions/allowReturnToOpener}} option to hide the button.
 
 <pre class="lang-javascript">
-documentPictureInPicture.requestWindow({ allowReturnToTab: false });
+documentPictureInPicture.requestWindow({ allowReturnToOpener: false });
 </pre>
 
 # Acknowledgments # {#acknowledgments}