https://danlevy.net/javascript-promises-quiz/ 

1. Multiple .catch’s 

var p = new Promise((resolve, reject) => {
  reject(Error('The Fails!'))
})
p.catch(error => console.log(error.message))
p.catch(error => console.log(error.message))

결과물은 무엇입니까?

2. Multiple .catch’s 

var p = new Promise((resolve, reject) => {
  return Promise.reject(Error('The Fails!'))
})
p.catch(error => console.log(error.message))
p.catch(error => console.log(error.message))

결과물은 무엇입니까?

3. Chaining .then and .catch’s 

var p = new Promise((resolve, reject) => {
    reject(Error('The Fails!'))
  })
  .catch(error => console.log(error))
  .then(error => console.log(error))

결과물은 무엇입니까?

4. Chaining .catch’s 

var p = new Promise((resolve, reject) => {
    reject(Error('The Fails!'))
  })
  .catch(error => console.log(error.message))
  .catch(error => console.log(error.message))

결과물은 무엇입니까?