Enable selective refresh for widgets in customizer (#1778)

src/admin.php

@@ -8,6 +8,12 @@ namespace App;
 add_action('customize_register', function (\WP_Customize_Manager $wp_customize) {
     // Add postMessage support
     $wp_customize->get_setting('blogname')->transport = 'postMessage';
+    $wp_customize->selective_refresh->add_partial('blogname', [
+        'selector' => '.brand',
+        'render_callback' => function () {
+            bloginfo('name');
+        }
+    ]);
 });
 
 /**

src/setup.php

@@ -54,6 +54,12 @@ add_action('after_setup_theme', function () {
      */
     add_theme_support('html5', ['caption', 'comment-form', 'comment-list', 'gallery', 'search-form']);
 
+    /**
+     * Enable selective refresh for widgets in customizer
+     * @link https://developer.wordpress.org/themes/advanced-topics/customizer-api/#theme-support-in-sidebars
+     */
+    add_theme_support('customize-selective-refresh-widgets');
+
     /**
      * Use main stylesheet for visual editor
      * @see assets/styles/layouts/_tinymce.scss