​x
 
<!DOCTYPE html>
<html>
<body>
​
<h2>JavaScript async / await</h2>
​
<p>Wait 3 seconds (3000 milliseconds) for this page to change.</p>
​
<h1 id="demo"></h1>
​
<script>
async function myDisplay() {
  let myPromise = new Promise(function(myResolve, myReject) {
    setTimeout(function() { myResolve("I love You !!"); }, 3000);
  });
  document.getElementById("demo").innerHTML = await myPromise;
}
​
myDisplay();
</script>
​
</body>
</html>