jquery promise then code example

Example 1: .promise()

var promise = new Promise(function(resolve, reject) {
  // do some long running async thing…
  
  if (/* everything turned out fine */) {
    resolve("Stuff worked!");
  }
  else {
    reject(Error("It broke"));
  }
});

Example 2: jquery post with promises

function ajax(options) {
  return new Promise(function (resolve, reject) {
    $.ajax(options).done(resolve).fail(reject);
  });
}