[wp-trac] [WordPress Trac] #31687: Customizer: fix errors when embedded in a different origin

[WordPress Trac]

#31687: Customizer: fix errors when embedded in a different origin
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 Reporter:  mattwiebe     |       Owner:
     Type:  defect (bug)  |      Status:  new
 Priority:  normal        |   Milestone:  Awaiting Review
Component:  Customize     |     Version:  4.1
 Severity:  normal        |  Resolution:
 Keywords:  has-patch     |     Focuses:  javascript
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Changes (by mattwiebe):

 * keywords:   => has-patch


Comment:

 An alternative approach would just be not using `wp.customize.Value` for
 the `targetWindow` property. I don't think any of the sugar there is
 needed that badly. This would remove the try/catch overhead for every
 single `api.Value` instance in the Customizer.

 For the `document.title` part, we could do a try/catch initially and
 remember whether it's an accessible origin or not, sidestepping the
 try/catch every time.

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Ticket URL: <https://core.trac.wordpress.org/ticket/31687#comment:1>
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