Backwards compatibility

README.md

@@ -507,7 +507,7 @@ $logomark_svg_markup = am_get_symbol(
 
 ## Requirements
 
-* WordPress: 6.3.0+
+* WordPress: 5.2.0+
 * PHP: 7.4+
 
 ## Downloads and Versioning.

asset-manager.php

@@ -5,33 +5,15 @@
  * @package AssetManager
  */
 
-/**
- * Plugin Name: Asset Manager
- * Plugin URI: https://github.com/alleyinteractive/wp-asset-manager
- * Description: Add more robust functionality to enqueuing static assets
- * Author: Alley Interactive
- * Version: 1.3.7
- * License: GPLv2 or later
- * Author URI: https://www.alleyinteractive.com/
- * Requires at least: 6.3
- */
-
-// Check the minimum required WordPress version.
-if ( version_compare( $GLOBALS['wp_version'], '6.3', '<' ) ) {
-    add_action( 'admin_notices', 'am_minimum_wp_version_notice' );
-    return;
-}
-
-/**
- * Display an admin notice if the minimum required WordPress version is not met.
- */
-function am_minimum_wp_version_notice() {
-    $message = sprintf(
-        __( 'Asset Manager requires WordPress version %s or higher. Please update WordPress to use this plugin.', 'am' ),
-        '6.3'
-    );
-    printf( '<div class="notice notice-error"><p>%s</p></div>', $message );
-}
+/*
+Plugin Name: Asset Manager
+Plugin URI: https://github.com/alleyinteractive/wp-asset-manager
+Description: Add more robust functionality to enqueuing static assets
+Author: Alley Interactive
+Version: 1.3.7
+License: GPLv2 or later
+Author URI: https://www.alleyinteractive.com/
+*/
 
 /**
  * Filesystem path to AssetManager.

php/class-asset-manager-scripts.php

@@ -252,8 +252,14 @@ public function post_validate_asset( $script ) {
 	 * @param array $script Script to add.
 	 */
 	public function add_to_async( $script ) {
+		// For version of WordPress 6.3+ async and defer can use the core strategy for loading.
+		if ( version_compare( $GLOBALS['wp_version'], '6.3', '<' ) ) {
+			$load_methods_to_async = [ 'async', 'defer', 'async-defer' ];
+		} else {
+			$load_methods_to_async = [ 'async-defer' ];
+		}
 		if (
-			( 'async-defer' === $script['load_method'] ) &&
+			in_array( $script['load_method'], $load_methods_to_async, true ) &&
 			! in_array( $script['handle'], $this->async_scripts, true )
 		) {
 			$this->async_scripts[] = $script['handle'];

php/class-asset-manager.php

@@ -302,11 +302,15 @@ public function add_asset( $args ) {
 					if ( 'style' === $args['type'] ) {
 						$enqueue_options = $args['media'];
 					} else {
-						$enqueue_options = [
-							'in_footer' => $args['in_footer'],
-						];
-						if ( in_array( $args['load_method'], [ 'async', 'defer' ], true ) ) {
-							$enqueue_options['strategy'] = $args['load_method'];
+						if ( version_compare( $GLOBALS['wp_version'], '6.3', '<' ) ) {
+							$enqueue_options = $args['in_footer'];
+						} else {
+							$enqueue_options = [
+								'in_footer' => $args['in_footer'],
+							];
+							if ( in_array( $args['load_method'], [ 'async', 'defer' ], true ) ) {
+								$enqueue_options['strategy'] = $args['load_method'];
+							}
 						}
 					}
 

tests/test-scripts.php

@@ -164,17 +164,17 @@ function test_add_to_async() {
 	}
 
 	/**
-     * Test defer attribute handling.
-     */
+	 * Test defer attribute handling.
+	 */
     public function test_defer_attribute() {
 
 		// Enqueue the script with the defer attribute.
 		am_enqueue_script( $this->test_script['handle'], $this->test_script['src'], [], 'global', 'defer' );
 
-        // Get the script tag output.
-        $script_output = get_echo( 'wp_print_scripts', [ $this->test_script['handle'] ] );
+		// Get the script tag output.
+		$script_output = get_echo( 'wp_print_scripts', [ $this->test_script['handle'] ] );
 
 		// Check if the script tag has the defer attribute.
-        $this->assertStringContainsString( 'data-wp-strategy="defer"', $script_output );
+		$this->assertStringContainsString( 'defer"', $script_output );
     }
 }