Ticket #26210: 26210.patch

wp-content/themes/twentyfourteen/inc/widgets.php

@@ -81 +81 @@
                 $content = get_transient( $this->id );
 
                 if ( false !== $content ) {
+                        // Workaround for enqueuing MediaElement.js when using cached content
+                        if ( get_transient( $this->id . '_mejs' ) ) {
+                                wp_enqueue_style( 'wp-mediaelement' );
+                                wp_enqueue_script( 'wp-mediaelement' );
+                        }
+
                         echo $content;
                         return;
                 }
@@ -88 +94 @@
                 ob_start();
                 extract( $args, EXTR_SKIP );
 
+                // Check if MediaElement.js has been enqueued before loop
+                $mediaelements_before = wp_script_is( 'wp-mediaelement' );
+
                 $format = $instance['format'];
                 $number = empty( $instance['number'] ) ? 2 : absint( $instance['number'] );
                 $title  = apply_filters( 'widget_title', empty( $instance['title'] ) ? $this->format_strings[ $format ] : $instance['title'], $instance, $this->id_base );
@@ -215 +224 @@
 
                 endif; // End check for ephemeral posts.
 
+                // Check if MediaElement.js has been enqueued after loop
+                $mediaelements_after = wp_script_is( 'wp-mediaelement' );
+
+                // Set transient if MediaElement.js has been enqueued during loop
+                if ( true === $mediaelements_after && false === $mediaelements_before ) {
+                        set_transient( $this->id . '_mejs', true );
+                }
+
                 set_transient( $this->id, ob_get_flush() );
         }
 
@@ -249 +266 @@
          */
         function flush_widget_cache() {
                 delete_transient( $this->id );
+                delete_transient( $this->id . '_mejs' );
         }
 
         /**