JSFiddle - React, Tailwind, and code Playground

JavaScript

var xhr1 = $.ajax({ url:'/echo/json/', data:{ delay: 3 } }),
    xhr2 = $.ajax({ url:'/echo/json/something/invalid', data:{ delay: 3 } });

xhr1.always(function(){
    console.log('xhr1 always');
});

xhr2.always(function(){
    console.log('xhr2 always');
});

$.when.apply($, [xhr1, xhr2]).always(function(){
    console.log('xhr1 & xhr2 always');
});