WordPress/wp-admin/js/user-suggest.min.js

!function(a){var b="undefined"!=typeof current_site_id?"&site_id="+current_site_id:"";a(document).ready(function(){var c={offset:"0, -1"};"undefined"!=typeof isRtl&&isRtl&&(c.my="right top",c.at="right bottom"),a(".wp-suggest-user").each(function(){var d=a(this),e="undefined"!=typeof d.data("autocompleteType")?d.data("autocompleteType"):"add",f="undefined"!=typeof d.data("autocompleteField")?d.data("autocompleteField"):"user_login";d.autocomplete({source:ajaxurl+"?action=autocomplete-user&autocomplete_type="+e+"&autocomplete_field="+f+b,delay:500,minLength:2,position:c,open:function(){a(this).addClass("open")},close:function(){a(this).removeClass("open")}})})})}(jQuery);