[wp-trac] [WordPress Trac] #48620: Javascript error when opening file uploader inside the editor

[WordPress Trac]

#48620: Javascript error when opening file uploader inside the editor
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 Reporter:  rogeriomoreira             |      Owner:  (none)
     Type:  defect (bug)               |     Status:  new
 Priority:  normal                     |  Milestone:  Awaiting Review
Component:  Media                      |    Version:  5.3
 Severity:  normal                     |   Keywords:
  Focuses:  accessibility, javascript  |
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 I updated one of my WordPress installations to version 5.3 and I'm getting
 a Javascript error.

 Steps to reproduce:

 1. Create a new post
 2. Go to Select or Upload Media button
 3. Click on Upload Media

 When I click Upload Media, the click generates the following error:

 [[Image(https://i.imgur.com/ms19jG5.png)]]

 From my initial investigation, it seems that it is related to the
 accessibility improvements made on version 5.3.
 I also made a test with the JS files from version 5.2.4 and everything
 works as expected, so it was some change introduced on 5.3.

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Ticket URL: <https://core.trac.wordpress.org/ticket/48620>
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