$( document ).ajaxComplete(function( event,request, settings ) {
$( "#msg" ).append( "<li>Request Complete.</li>" );
});
<script>
require(['jquery', 'Magento_Customer/js/customer-data', 'domReady!'], function($) {
'use strict';
$(document).ajaxComplete(function( event, xhr, settings ) {
console.log( settings.url );
});
});
</script>