[wp-trac] [WordPress Trac] #39128: Customize: Preview fails to load when domain mapping in use (home/siteurl domain mismatch)

[WordPress Trac]

#39128: Customize: Preview fails to load when domain mapping in use (home/siteurl
domain mismatch)
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 Reporter:  RomainVB           |       Owner:
     Type:  defect (bug)       |      Status:  assigned
 Priority:  normal             |   Milestone:  4.7.3
Component:  Customize          |     Version:  4.7
 Severity:  normal             |  Resolution:
 Keywords:  reporter-feedback  |     Focuses:
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Comment (by westonruter):

 That being said, I'm confused then as to why there is code in the
 customizer for `is_cross_domain()` at all, if a cross-domain iframe has
 never worked.

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Ticket URL: <https://core.trac.wordpress.org/ticket/39128#comment:35>
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