[wp-trac] [WordPress Trac] #38426: Twenty Seventeen: Improve user and developer experience with the customizer integration

[WordPress Trac]

#38426: Twenty Seventeen: Improve user and developer experience with the customizer
integration
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 Reporter:  celloexpressions  |      Owner:
     Type:  defect (bug)      |     Status:  new
 Priority:  normal            |  Milestone:  4.7
Component:  Bundled Theme     |    Version:  trunk
 Severity:  normal            |   Keywords:  has-patch
  Focuses:  ui                |
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 As the default theme, Twenty Seventeen should showcase what themes can
 (and should) do with the customizer API. This applies to both users, via
 instant live previews and contextual controls, and developers, via code
 that follows core conventions.

 Twenty Seventeen should follow all of the recommendations for themes in
 [https://developer.wordpress.org/themes/advanced-topics/customizer-api/
 the official customize API documentation]. Additionally, every option
 should be previewable with Selective Refresh and, where feasible, instant
 `postMessage` JS-based updates, as these approaches provide faster, more
 contextual user feedback as they make changes. Controls should be
 contextual to when they apply. The preview should be as accurate a
 representation of the front end of the site as possible. The code should
 be DRY and as simple as possible.

 While the initial commit of the theme contains extensive work toward these
 goals, there are several problems with the current implementation, with
 #38399 discussing the front page sections handling in particular. This
 ticket addresses all of the major customize-related issues that don't
 already have complete patches elsewhere (like #38400). Because many of the
 issues are inter-related, they'll be addressed together initially, then we
 can follow up with additional adjustments as needed.

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Ticket URL: <https://core.trac.wordpress.org/ticket/38426>
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