promise#all.js

var p1 = new Promise(function(resolve, reject) {
  setTimeout(function() {
    resolve(1);
  }, 2);
});

var p2 = new Promise(function(resolve, reject) {
  setTimeout(function() {
    reject(1);
  }, 1);
});

var all = Promise.all([p1, p2]);

all.then(function() {
  console.log('ok', arguments);
}, function() {
  console.log('err', arguments);
});