// Create new promise
const p = new Promise((resolve, reject) => {
  reject(new Error('some error'));
  //resolve('Some data');
});

// Then/catch
p.then(result => console.log(result)).catch(error => console.error(error));

// Async
const foo = async () => {
  try {
    const result = await p;
    console.log(result);
  } catch (error) {
    console.log('it crashed', error);
  }
};

foo();