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<html><body><h1>JavaScript Promise Object</h1><h2>The then() Metod</h2><p id="demo"></p><script>function myDisplayer(some) { document.getElementById("demo").innerHTML = some;}let myPromise = new Promise(function(myResolve, myReject) { let req = new XMLHttpRequest(); req.open('GET', "mycar.html"); req.onload = function() { if (req.status == 200) { myResolve(req.response); } else { myReject("File not Found"); } }; req.send();});myPromise.then( function(value) {myDisplayer(value);}, function(error) {myDisplayer(error);});</script></body></html>