Ticket #38922: 38922.2.diff

src/wp-admin/includes/ajax-actions.php

@@ -101 +101 @@
 /**
  * Ajax handler for tag search.
  *
+ * @deprecated 4.8.0 Use the REST API tags endpoint instead.
+ *
  * @since 3.1.0
  */
 function wp_ajax_ajax_tag_search() {

src/wp-admin/js/tags-suggest.js

@@ -53 +53 @@
 
                                 term = getLast( request.term );
 
-                                $.get( window.ajaxurl, {
-                                        action: 'ajax-tag-search',
-                                        tax: taxonomy,
-                                        q: term
+                                $.get( window.tagsSuggestL10n.rest_url, {
+                                        taxonomy: taxonomy,
+                                        search: term
                                 } ).always( function() {
                                         $element.removeClass( 'ui-autocomplete-loading' ); // UI fails to remove this sometimes?
                                 } ).done( function( data ) {
-                                        var tagName;
-                                        var tags = [];
-
-                                        if ( data ) {
-                                                data = data.split( '\n' );
-
-                                                for ( tagName in data ) {
-                                                        var id = ++tempID;
-
-                                                        tags.push({
-                                                                id: id,
-                                                                name: data[tagName]
-                                                        });
-                                                }
-
-                                                cache = tags;
-                                                response( tags );
-                                        } else {
-                                                response( tags );
-                                        }
+                                        cache = data;
+                                        response( data );
                                 } );
 
                                 last = request.term;
@@ -118 +99 @@
                         close: function() {
                                 $element.attr( 'aria-expanded', 'false' );
                         },
-                        minLength: 2,
+                        minLength: window.tagsSuggestL10n.minChars,
                         position: {
                                 my: 'left top+2'
                         },

src/wp-includes/script-loader.php

@@ -547 +547 @@
                         'termSelected' => __( 'Term selected.' ),
                         'termAdded'    => __( 'Term added.' ),
                         'termRemoved'  => __( 'Term removed.' ),
+                        'rest_url'     => rest_url( '/wp/v2/tags' ),
+                        /**
+                         * Filters the minimum number of characters required to fire a tag search via Ajax.
+                         *
+                         * @since 4.0.0
+                         *
+                         * @param int         $characters The minimum number of characters required. Default 2.
+                         */
+                        'minChars'     => (int) apply_filters( 'term_search_min_chars', 2 ),
                 ) );
 
                 $scripts->add( 'post', "/wp-admin/js/post$suffix.js", array( 'suggest', 'wp-lists', 'postbox', 'tags-box', 'underscore', 'word-count', 'wp-a11y' ), false, 1 );