JavaScript Promises

const mock = (success, timeout = 1000) => {
  return new Promise((resolve, reject) => {
    setTimeout(() => {
      if(success) {
        resolve({status: 200, data:{}});
      } else {
        reject({message: 'Error'});
      }
    }, timeout);
  });
}
const someEvent = async () => {
  try {
    await mock(true, 1000);
  } catch (e) {
    console.log(e.message);
  }
}

const promise = new Promise(resolve => setTimeout(() => resolve('dAlan'), 100));
promise.then(res => {
  return res === 'Alan' ? Promise.resolve('Hey Alan!') : Promise.reject('Who are you?')
}).then((res) => {
  console.log(res)
}, (err) => {
  console.error(err)
});

const executorFn = (resolve, reject) => {
  console.log('The executor function of the promise!');
};
const promise = new Promise(executorFn);

const promise = new Promise((resolve, reject) => {  
  setTimeout(() => {
    resolve('\*');
  }, 1000);
});
const twoStars = (star) => {  
  return (star + star);
};
const oneDot = (star) => {  
  return (star + '.');
};
const print = (val) => {
  console.log(val);
};
// Chaining them all together
promise.then(twoStars).then(oneDot).then(print);

const promise1 = new Promise((resolve, reject) => {
  setTimeout(() => {
    resolve(3);
  }, 300);
});
const promise2 = new Promise((resolve, reject) => {
  setTimeout(() => {
    resolve(2);
  }, 200);
});
Promise.all([promise1, promise2]).then((res) => {
  console.log(res[0]);
  console.log(res[1]);
});

const promise = new Promise((resolve, reject) => {  
  setTimeout(() => {
    reject(Error('Promise Rejected Unconditionally.'));
  }, 1000);
});
promise.then((res) => {
  console.log(value);
});
promise.catch((err) => {
  console.error(err);
});

const promise = new Promise((resolve, reject) => {    
  setTimeout(() => {
    resolve('Result');
  }, 200);
});
promise.then((res) => {
  console.log(res);
}, (err) => {
  console.error(err);
});

const loginAlert = () =>{
  console.log('Login');
};
setTimeout(loginAlert, 6000);

const executorFn = (resolve, reject) => {
  resolve('Resolved!');
};
const promise = new Promise(executorFn);

const promise = new Promise((resolve, reject) => {
  const res = true;
  // An asynchronous operation.
  if (res) {
    resolve('Resolved!');
  }
  else {
    reject(Error('Error'));
  }
});
promise.then((res) => console.log(res), (err) => console.error(err));