[wp-trac] [WordPress Trac] #47014: Tag balancing corrupts Custom Elements

[WordPress Trac]

#47014: Tag balancing corrupts Custom Elements
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 Reporter:  westonruter               |       Owner:  flixos90
     Type:  defect (bug)              |      Status:  reviewing
 Priority:  normal                    |   Milestone:  5.3
Component:  Formatting                |     Version:  2.0.4
 Severity:  normal                    |  Resolution:
 Keywords:  has-patch has-unit-tests  |     Focuses:
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Comment (by flixos90):

 @dmsnell Thanks for these detailed observations. There are indeed several
 shortcomings in the current parser, but fixing all of them goes beyond the
 scope of this ticket. I also think only covering regular word characters
 in this iteration is a valuable enough change.

 I agree though that we must make sure to not accidentally allow invalid
 tags (e.g. custom element tags including capital letters as you mention).
 Something I'm also wondering about: Is it actually valid to have a tag
 like `<--->`? According to
 [https://w3c.github.io/webcomponents/spec/custom/#valid-custom-element-
 name the spec] it seems so.

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Ticket URL: <https://core.trac.wordpress.org/ticket/47014#comment:5>
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