[wp-trac] [WordPress Trac] #42390: TinyMCE + Edge input:focus placeholders disappear

[WordPress Trac]

#42390: TinyMCE + Edge input:focus placeholders disappear
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 Reporter:  Cybr                                 |      Owner:
     Type:  defect (bug)                         |     Status:  new
 Priority:  normal                               |  Milestone:  Awaiting
Component:  Administration                       |  Review
 Severity:  normal                               |    Version:  trunk
  Focuses:  ui, accessibility, javascript,       |   Keywords:
  administration                                 |
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 Using EdgeHTML 15, when the TinyMCE script is present (`tinymce.min.js`),
 input placeholders disappear when focussing the field.

 A good place to test this behavior is on the post/page's title input,
 where "Enter title here" will disappear on focus.

 AFAIK, only `input[type=text]` and `textarea` are affected.
 `input[type=password]`, for example, works as intended.

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Ticket URL: <https://core.trac.wordpress.org/ticket/42390>
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