JSFiddle - React, Tailwind, and code Playground

JavaScript

function doGet(url) {
  return $.post(url, {
    html: url
  })/*.then(data => data).fail(function() {
    console.log('oups');
  })*/;
}

$.when(doGet('/echo/html/'), doGet('/echo/html/')).done(function(u1, u2) {
  console.log(u1, u2);
});