Merge pull request #16486 from woocommerce/fix/16317

Sort multiselects alphabetically

assets/js/admin/wc-enhanced-select.js

@@ -131,6 +131,24 @@ jQuery( function( $ ) {
 								} );
 							}
 						});
+					// Keep multiselects ordered alphabetically if they are not sortable.
+					} else if ( $( this ).prop( 'multiple' ) ) {
+						$( this ).on( 'change', function(){
+							var $children = $( this ).children();
+							$children.sort(function(a, b){
+ 								var atext = a.text.toLowerCase();
+       							var btext = b.text.toLowerCase();
+
+       							if (atext > btext) {
+         							return 1;
+       							}
+       							if (atext < btext) {
+         							return -1;
+       							}
+       							return 0;
+							});
+							$( this ).html( $children );
+						});
 					}
 				});