Promise Combinators in JavaScript

// Promise.all - all must succeed
Promise.all([p1, p2, p3])
  .then(results => console.log(results));

// Promise.race - first to settle wins
Promise.race([p1, p2, p3])
  .then(winner => console.log(winner));

// Promise.allSettled - wait for all
Promise.allSettled([p1, p2, p3])
  .then(results => results.forEach(r => 
    console.log(r.status, r.value || r.reason)
  ));

// Promise.any - first success wins
Promise.any([p1, p2, p3])
  .then(first => console.log(first));