Ticket #38867: 38867.0.diff

src/wp-includes/class-wp-customize-manager.php

@@ -1353 +1353 @@
 
                 wp_enqueue_script( 'customize-preview' );
                 add_action( 'wp_head', array( $this, 'customize_preview_loading_style' ) );
+                if ( $this->messenger_channel ) {
+                        add_action( 'wp_head', array( $this, 'remove_frameless_preview_messenger_channel' ) );
+                }
                 add_action( 'wp_footer', array( $this, 'customize_preview_settings' ), 20 );
                 add_filter( 'get_edit_post_link', '__return_empty_string' );
 
@@ -1488 +1491 @@
         }
 
         /**
+         * Remove customize_messenger_channel query parameter from the preview window when it is not in an iframe.
+         *
+         * @since 4.7.0
+         * @access public
+         */
+        public function remove_frameless_preview_messenger_channel( ){
+                if ( ! $this->messenger_channel ) {
+                        return;
+                }
+                ?>
+                <script>
+                ( function() {
+                        var urlParser;
+                        if ( parent !== window ) {
+                                return;
+                        }
+                        urlParser = document.createElement( 'a' );
+                        urlParser.href = location.href;
+                        urlParser.search = urlParser.search.replace( /(^|&)customize_messenger_channel=(.+?)(?=$|&)/, '' );
+                        if ( urlParser.search !== location.search ) {
+                                location.replace( urlParser.href );
+                        }
+                } )();
+                </script>
+                <?php
+        }
+
+        /**
          * Print JavaScript settings for preview frame.
          *
          * @since 3.4.0