Ticket #40342: 40342.2.diff

src/wp-admin/js/user-profile.js

@@ -328 +328 @@
 
         $(document).ready( function() {
                 var $colorpicker, $stylesheet, user_id, current_user_id,
-                        select = $( '#display_name' );
+                        select = $( '#display_name' ),
+                        current_name = select.val(),
+                        greeting = $( '#wp-admin-bar-my-account' ).find('.display-name');
 
                 $('#pass1').val('').on( inputEvent + ' pwupdate', check_pass_strength );
                 $('#pass-strength-result').show();
@@ -370 +372 @@
                                         }
                                 });
                         });
+
+                        /**
+                         * Replaces "Howdy, *" in the admin toolbar whenever the display name dropdown is updated for one's own profile.
+                         */
+                        select.on( 'change', function() {
+                if ( user_id !== current_user_id ) {
+                                    return;
+                }
+
+                                var display_name = $.trim( this.value ) || current_name;
+
+                                greeting.text( display_name );
+                        } );
                 }
 
                 $colorpicker = $( '#color-picker' );

src/wp-includes/admin-bar.php

@@ -214 +214 @@
 
         $avatar = get_avatar( $user_id, 26 );
         /* translators: %s: current user's display name */
-        $howdy  = sprintf( __( 'Howdy, %s' ), $current_user->display_name );
+        $howdy  = sprintf( __( 'Howdy, %s' ), '<span class="display-name">' . $current_user->display_name . '</span>' );
         $class  = empty( $avatar ) ? '' : 'with-avatar';
 
         $wp_admin_bar->add_menu( array(