[wp-trac] [WordPress Trac] #51577: DOMException: Failed to set the 'selectionStart' property on 'HTMLInputElement'

[WordPress Trac]

#51577: DOMException: Failed to set the 'selectionStart' property on
'HTMLInputElement'
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 Reporter:  bradmarshall  |      Owner:  (none)
     Type:  defect (bug)  |     Status:  new
 Priority:  normal        |  Milestone:  Awaiting Review
Component:  General       |    Version:  5.5.1
 Severity:  blocker       |   Keywords:
  Focuses:                |
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 Actual behaviour:
 dom.js is attempting to access the `selectionStart` property on
 input[type=email] in Gutenberg running WordPress 5.5.1, which triggers a
 DOM exception in the WP admin which breaks the gutenberg block containing
 the input.

 Why?
 This MDN article (https://developer.mozilla.org/en-
 US/docs/Web/API/HTMLInputElement/setSelectionRange) states that only
 certain types of inputs and textareas impmlement selectionStart /
 selectionEnd but it looks as though numerous functions throughout the file
 attempt to use selectionStart/selectionEnd without first qualifying the
 type of input in question. Therefore, any input[type=email] elements in a
 block are crashing out.

 Expected behaviour:
 dom.js should not attempt to use selectionStart/selectionEnd on just any
 type of input - it should instead first check to make sure it's one of
 type=text, search, URL, tel or password. Gutenberg blocks containing input
 types other than these should not crash.

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Ticket URL: <https://core.trac.wordpress.org/ticket/51577>
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