Pause function for JS

pause.js

// I'm not proud of this but JS has forced my hand
function pause(time) {
  if (typeof time !== "number") {
    throw("time should be a number in milliseconds");
  }
  var endTime;
  
  endTime = (new Date()).getTime() + time;
  while(1) {
    var newTime = (new Date()).getTime();
    
    if (newTime > endTime) {
      return;
    }
  }
}

console.log("start");
// wait (roughly) 1 second
pause(1000);
console.log("finish");