How to handle errors in fetch() responses with Redux-Saga?

Question

I try to handle Unauthorized error from server using redux-saga. This is my saga:

function* logIn(action) {
  try {
    const user = yield call(         


        

Answer 1

if you want to have that if statement verifying the response status if(res.status >= 200 && res.status < 300) { you need to have it inside your first promise where res is defined, it's currently inside the resolved promise for res.json()

.then(res => {
   if (res.status >= 200 && res.status < 300) {
      res.json().then(json => {
         return json
    }
  })
})