PreLoad some stuff

Author: officiallygod

includes/WP_Admin.php

@@ -145,6 +145,30 @@ public static function register_assets() {
 				'wp.blocks.unstable__bootstrapServerSideBlockDefinitions(' . wp_json_encode( get_block_editor_server_block_settings() ) . ');'
 			);
 
+			// Preload server-registered block bindings sources.
+			$registered_sources = get_all_registered_block_bindings_sources();
+			if ( ! empty( $registered_sources ) ) {
+				$filtered_sources = array();
+				foreach ( $registered_sources as $source ) {
+					$filtered_sources[] = array(
+						'name'        => $source->name,
+						'label'       => $source->label,
+						'usesContext' => $source->uses_context,
+					);
+				}
+				$script = sprintf( 'for ( const source of %s ) { wp.blocks.registerBlockBindingsSource( source ); }', wp_json_encode( $filtered_sources ) );
+				wp_add_inline_script(
+					'wp-blocks',
+					$script
+				);
+			}
+
+			wp_add_inline_script(
+				'wp-blocks',
+				sprintf( 'wp.blocks.setCategories( %s );', wp_json_encode( get_block_categories( $block_editor_context ) ) ),
+				'after'
+			);
+
 			\wp_enqueue_script( self::$slug );
 			\wp_enqueue_style( self::$slug );