[wp-trac] [WordPress Trac] #52543: Twenty Twenty: Vendor prefix build steps are missing configuration

[WordPress Trac]

#52543: Twenty Twenty: Vendor prefix build steps are missing configuration
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 Reporter:  ryelle         |      Owner:  (none)
     Type:  defect (bug)   |     Status:  new
 Priority:  normal         |  Milestone:  Awaiting Review
Component:  Bundled Theme  |    Version:
 Severity:  normal         |   Keywords:
  Focuses:                 |
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 When building Twenty Twenty, there are two steps that run over CSS files,
 a vendor prefixer and RTL conversion. The vendor prefixer uses postcss,
 but there is no `postcss.config.js` file. It looks like this wasn't
 brought over from github when the theme was initially committed. When
 `build` is run currently, we can see an error:

 > You did not set any plugins, parser, or stringifier. Right now, PostCSS
 does nothing. Pick plugins for your case on https://www.postcss.parts/ and
 use them in postcss.config.js.


 We should either remove the postcss commands from `build` (if so, we can
 also remove the dependencies), or add in a postcss config.

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Ticket URL: <https://core.trac.wordpress.org/ticket/52543>
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