[wp-trac] [WordPress Trac] #40405: Customize: IE9 errors when attempting to generate changeset parameter

[WordPress Trac]

#40405: Customize: IE9 errors when attempting to generate changeset parameter
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 Reporter:  westonruter   |      Owner:
     Type:  defect (bug)  |     Status:  new
 Priority:  normal        |  Milestone:  4.7.4
Component:  Customize     |    Version:
 Severity:  normal        |   Keywords:
  Focuses:                |
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 The change [39686] for #39227 broke the customizer in IE9 since it doesn't
 properly account for the availability of `history.replaceState`.

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Ticket URL: <https://core.trac.wordpress.org/ticket/40405>
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