[wp-trac] [WordPress Trac] #42553: IE11: content loss when editing a post (Object doesn't support property or method 'matches')

[WordPress Trac]

#42553: IE11: content loss when editing a post (Object doesn't support property or
method 'matches')
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 Reporter:  afercia                    |       Owner:
     Type:  defect (bug)               |      Status:  new
 Priority:  high                       |   Milestone:  4.9
Component:  Editor                     |     Version:  4.9
 Severity:  critical                   |  Resolution:
 Keywords:  has-screenshots has-patch  |     Focuses:
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Comment (by SergeyBiryukov):

 There's a similar `$is_IE` check earlier in the file for `editor_expand`
 feature: [source:tags/4.8.3/src/wp-admin/edit-form-
 advanced.php?marks=33#L23].

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Ticket URL: <https://core.trac.wordpress.org/ticket/42553#comment:10>
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