Ticket #23225: 23225.2.patch

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

@@ -424 +424 @@
                 add_action( 'wp_head', array( $this, 'customize_preview_base' ) );
                 add_action( 'wp_head', array( $this, 'customize_preview_html5' ) );
                 add_action( 'wp_footer', array( $this, 'customize_preview_settings' ), 20 );
+                add_action( 'wp_footer', array( $this, 'customize_preview_base_hash_url_fix' ), 30 );
                 add_action( 'shutdown', array( $this, 'customize_preview_signature' ), 1000 );
                 add_filter( 'wp_die_handler', array( $this, 'remove_preview_signature' ) );
 
@@ -461 +462 @@
          * @since 3.4.0
          */
         public function customize_preview_base() {
-                ?><base href="<?php echo home_url( '/' ); ?>" /><?php
+                // Note: we cannot just pass $_SERVER[REQUEST_URI] directly to home_url() because of subdirectory installs
+                $host = parse_url( home_url(), PHP_URL_HOST );
+                $base_href = '//' . $host . wp_unslash( $_SERVER['REQUEST_URI'] );
+                ?><base href="<?php echo esc_url( $base_href ); ?>" /><?php
         }
 
         /**
@@ -516 +520 @@
         }
 
         /**
+         * Print script to allow hash URLs to work as expected
+         *
+         * @since 4.1
+         */
+        public function customize_preview_base_hash_url_fix() {
+                wp_print_scripts( array( 'jquery' ) );
+                ?><script>
+                (function( $ ){
+                        var base = $( 'head > base[href]:last' ),
+                                baseUrl = base.prop( 'href' ).replace( /#.*/, '' );
+                        $( 'a[href^="#"]' ).attr( 'href', function ( i, hash ) {
+                                return baseUrl + hash;
+                        } );
+                })( jQuery );
+                </script><?php
+        }
+
+        /**
          * Prints a signature so we can ensure the customizer was properly executed.
          *
          * @since 3.4.0