event loop example, tasks, queueing

gistfile1.txt

// what is the order of the statements logged to the console?

console.log('script start');

setTimeout(function() {
  console.log('setTimeout');
}, 0);

Promise.resolve().then(function() {
  console.log('promise1');
}).then(function() {
  console.log('promise2');
});


Promise.resolve().then(function() {
  console.log('promise3');
}).then(function() {
  console.log('promise4');
});

console.log('script end')
console.log('script end')
console.log('script end')

/*
 * Answer below
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 script start
 script end
 promise1
 promise2
 promise3
 promise4
 setTimeout
 *
 *
 */