eventOrTimeout

gistfile1.txt

function waitFor(ms) {
  return new Promise(resolve => setTimeout(resolve, ms));
}

function eventOrTimeout() {
  let [evResolve, evReject] = [];
  const evPromise = new Promise((res, rej) => [evResolve, evReject] = [res, rej]);
  someElement.on('someEvent', function(event) {
    if (event.someCondition)
      evResolve(event.someValue);
    else if (event.otherCondition)
      evReject();
  });
  const timeout = 15000;
  return Promise.race([evPromise, waitFor(timeout)]);
}