Ticket #41671: 41671.0.diff

src/wp-includes/widgets/class-wp-widget-categories.php

@@ -59 +59 @@
                 $cat_args = array(
                         'orderby'      => 'name',
                         'show_count'   => $c,
-                        'hierarchical' => $h
+                        'hierarchical' => $h,
                 );
 
                 if ( $d ) {
+                        echo sprintf( '<form action="%s" method="get">', esc_url( home_url() ) );
                         $dropdown_id = ( $first_dropdown ) ? 'cat' : "{$this->id_base}-dropdown-{$this->number}";
                         $first_dropdown = false;
 
@@ -81 +82 @@
                          * @param array $cat_args An array of Categories widget drop-down arguments.
                          */
                         wp_dropdown_categories( apply_filters( 'widget_categories_dropdown_args', $cat_args ) );
+
+                        echo '</form>';
                         ?>
 
 <script type='text/javascript'>
@@ -89 +92 @@
         var dropdown = document.getElementById( "<?php echo esc_js( $dropdown_id ); ?>" );
         function onCatChange() {
                 if ( dropdown.options[ dropdown.selectedIndex ].value > 0 ) {
-                        location.href = "<?php echo home_url(); ?>/?cat=" + dropdown.options[ dropdown.selectedIndex ].value;
+                        dropdown.parentNode.submit();
                 }
         }
         dropdown.onchange = onCatChange;