arrowfunctionVSnonarrowfunctionPromises.js

const arrowTenPromise = new Promise((resolve, reject) => {
    let importantNumber = 11;
    if (importantNumber == 10) {
      resolve('Success using arrow functions, so we call resolved for the promise.');
    } else {
      reject('Rejected because important number is not equal to 10');
    }
});

arrowTenPromise.then(function(result) {
  console.log(result);
}).catch( (error) => console.log(error));

const nonArrowTenPromise = new Promise(function callbackButYouCanNameItWhateverYouLike(resolve, reject) {
    let importantNumber = 10;
    if (importantNumber == 10) {
      resolve('Success, so we call resolved for the promise.');
    } else {
      reject('Rejected because important number is not equal to 10');
    }
});

nonArrowTenPromise.then(function(result) {
  console.log(result);
}).catch(function (error) {
  console.log(error);
})