[读] promises 很酷，但很多人并没有理解就在用了

promises 很酷，但很多人并没有理解就在用了

高级错误＃1:不了解Promise.resolve()

new Promise(function (resolve, reject) {
  resolve(11);
}).then(function(data){console.log(data)});


var aa = function(){
    console.log(111)
    return 1;
}

Promise.resolve(aa).then(function(data){console.log(data)})

Promise.reject(new Error('some awful error'));

高级错误＃3：promises vs promise工厂

function executeSequentially(promiseFactories) {
  var result = Promise.resolve();
  promiseFactories.forEach(function (promiseFactory) {
    result = result.then(promiseFactory);
  });
  return result;
}

高级错误＃5:promises丢失

Promise.resolve('foo').then(function () {
  return Promise.resolve('bar');
}).then(function (result) {
  console.log(result);
});