JSFiddle - React, Tailwind, and code Playground
JavaScript
// open your console!
function doAjax(){
$.get('http://ipv4.icanhazip.com').done(function(data) {return data;});
}
$.when( doAjax() )
.then(function(){
console.log(this);
})
.fail(function(){
console.log( 'I fire if one or more requests failed.' );
});