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<!DOCTYPE html>
<html>
<body>
<h2>JavaScript Promise</h2>
<p id="demo"></p>
<script>
function myDisplayer(some) {
  document.getElementById("demo").innerHTML = some;
}
let myPromise = new Promise(function(myResolve, myReject) {
  let x = 0;
// some code (try to change x to 5)
  if (x == 0) {
    myResolve("OK");
  } else {
    myReject("Error");
  }
});
myPromise.then(
  function(value) {myDisplayer(value);},
  function(error) {myDisplayer(error);}
);
</script>
</body>
<!-- Mirrored from www.w3schools.com/js/tryit.asp?filename=tryjs_promise2 by HTTrack Website Copier/3.x [XR&CO'2014], Wed, 21 Dec 2022 17:06:53 GMT -->
</html>