Simple Promise Example

This is a super simple example of using promises to order execution of functions asyncronously.

// Simple promise
function Kvp(key, value) {
  return new Promise(function(resolve, reject) {
    console.log(key, value);
    resolve();
  });
}

// Promise which runs every value second
function RunOn(value) {
  return new Promise(function(resolve, reject) {
    setInterval(function() {
      console.log(new Date().toISOString().substring(11, 19));
      resolve();
    }, value * 1000);
  });
}

// Promise which runs once after value seconds
function RunOnce(value) {
  return new Promise(function(resolve, reject) {
    var runOnce = setInterval(() => {
      console.log("RunOnce", value);
      clearInterval(runOnce); //stop function
      resolve();
    }, value * 1000);
  });
}

RunOn(1);
Kvp('A', 1).then(function() {
  Kvp('B', 2);
});
RunOnce(5).then(() => {
  Kvp("C", 5);
}).then(() => {
  Kvp('fin', 12);
});