[wp-trac] [WordPress Trac] #43135: Remove deprecated "es3" from .jshintrc file.

[WordPress Trac]

#43135: Remove deprecated "es3" from .jshintrc file.
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 Reporter:  aristath          |      Owner:
     Type:  defect (bug)      |     Status:  new
 Priority:  normal            |  Milestone:  Awaiting Review
Component:  Build/Test Tools  |    Version:  trunk
 Severity:  normal            |   Keywords:
  Focuses:                    |
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 `es3` has been deprecated in .jshintrc:
 http://jshint.com/docs/options/#es3
 We should instead use `"esversion": 3`.

 However, since WordPress no longer supports IE 6/7/8/9, ES3 is no longer
 necessary.
 Perhaps we could up it to 5?

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Ticket URL: <https://core.trac.wordpress.org/ticket/43135>
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