03-promises.ts

// Promise<number>
var promisedNumber = new Promise(function asyncUnitOfWork(fulfill, reject) {
  setTimeout(function () {
    reject(new Error('Could not produce number'))
  }, 1000)
});

console.log('start')
  
promisedNumber.then(
  function onFulfilled(value) {
    console.log('value: ', value)
  },
  function onRejected(err) {
    console.log('error: ', err.message)
  }
)

console.log('finish')