[wp-trac] [WordPress Trac] #35855: Let selective refresh component be required but be opt-in for sidebars/widgets (for now)

[WordPress Trac]

#35855: Let selective refresh component be required but be opt-in for
sidebars/widgets (for now)
----------------------------+--------------------------
 Reporter:  DrewAPicture    |       Owner:  westonruter
     Type:  task (blessed)  |      Status:  accepted
 Priority:  normal          |   Milestone:  4.5
Component:  Customize       |     Version:  trunk
 Severity:  normal          |  Resolution:
 Keywords:  has-patch       |     Focuses:
----------------------------+--------------------------

Comment (by westonruter):

 @obenland changing the `transport` would work well if there was a single
 setting to flip over to `postMessage`. The problem is it's a whole range
 of settings that need to change the default `transport` for. As for a
 `WP_Customize_Manager` flag… perhaps, but it could get tricky to add the
 hook early enough, like:

 {{{#!php
 <?php
 function twentytwenty_customize_widgets_selective_refresh_optin(
 $wp_customize ) {
     if ( isset( $wp_customize->widgets ) ) {
         $wp_customize->widgets->selective_refresh_support = true;
     }
 }
 add_action( 'customize_register',
 'twentytwenty_customize_widgets_selective_refresh_optin' );
 }}}

 Something like that? Maybe this would better in terms of encapsulation and
 reducing globals, but it seems an undue burden for themers vs:

 {{{#!php
 <?php
 add_theme_support( 'customize-selective-refresh-widgets' );
 }}}

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Ticket URL: <https://core.trac.wordpress.org/ticket/35855#comment:23>
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