Ticket #12009: async_defer_12009-2.patch

wp-includes/class.wp-scripts.php

@@ -351 +351 @@
                         echo $cond_after;
                 }
 
+        $async_attr = '';
+        $defer_attr = '';
+
+                if ( false === in_array( $handle, $this->in_footer ) ) {
+            if( true === apply_filters( 'script_attr_async', $obj->extra['is_async'] ?? false ) ) {
+                $async_attr = ' async';
+            }
+
+            if( true === apply_filters( 'script_attr_defer', $obj->extra['is_defer'] ?? false ) ) {
+                $defer_attr = ' defer';
+            }
+        }
+
                 // A single item may alias a set of items, by having dependencies, but no source.
                 if ( ! $src ) {
                         if ( $inline_script_tag ) {
@@ -385 +398 @@
                 }
 
                 $tag  = $translations . $cond_before . $before_handle;
-                $tag .= sprintf( "<script%s src='%s'></script>\n", $this->type_attr, $src );
+        $tag .= sprintf( "<script%s src='%s'%s%s></script>\n", $this->type_attr, $src, $async_attr, $defer_attr );
                 $tag .= $after_handle . $cond_after;
 
                 /**

wp-includes/functions.wp-scripts.php

@@ -389 +389 @@
  */
 function wp_script_add_data( $handle, $key, $value ) {
         return wp_scripts()->add_data( $handle, $key, $value );
+ }
+
+/**
+ * Add 'is_async' metadata to a script.
+ *
+ * @see WP_Dependencies::add_data()
+ *
+ * @param string|array $handles Names of the scripts.
+ */
+function wp_async_script($handles) {
+    if('string' === gettype($handles)) {
+        $handles = [$handles];
+    }
+
+    if('array' !== gettype($handles)) {
+        return;
+    }
+
+    foreach($handles as $handle ) {
+        wp_scripts()->add_data( $handle, 'is_async', true );
+    }
+}
+
+/**
+ * Add 'is_defer' metadata to a script.
+ *
+ * @see WP_Dependencies::add_data()
+ *
+ * @param string|array $handles Names of the scripts.
+ */
+function wp_defer_script($handles) {
+    if('string' === gettype($handles)) {
+        $handles = [$handles];
+    }
+
+    if('array' !== gettype($handles)) {
+        return;
+    }
+
+    foreach($handles as $handle ) {
+        wp_scripts()->add_data( $handle, 'is_defer', true );
+    }
 }