resolveWithTimeout.js

// https://jsfiddle.net/bxqfL89j/1/
/*
<div id="container">
  <button>Click To Show Message</button>
</div>
*/

function callFnWithTimeout(fn, timeoutMilli) {
  const waitPromise = new Promise(resolve => setTimeout(resolve, timeoutMilli));

  let outsideResolve;
  const controlablePromise = new Promise(function(resolve) { 
      outsideResolve = resolve; 
  });

  Promise.race([waitPromise, controlablePromise])
    .then(fn);
  
  return outsideResolve;
}

$("button").click(callFnWithTimeout(() => {
  $('#container').append('<p id="message">hello</p>');
}, 2000));