Ticket #40342: 40342.2.patch

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' ).children( 'a' ).first();
 
                 $('#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) {
+                                    var display_name = $.trim( this.value ) || current_name,
+                                        greeting_text = greeting.html();
+
+                                    greeting.html( greeting_text.replace( current_name, display_name ) );
+
+                                    // Save the new display name as current display name so that it can be used for the next change.
+                                    current_name = display_name;
+                }
+                        } );
                 }
 
                 $colorpicker = $( '#color-picker' );