Adding objects to localStorage. JSON

Question

I think, my question is very easy, but I never work with JSON and localStorage. So, I have a function, which returns an object and a loop, which fires the function n-times and create n-objects.

function result(){
  //some other functions
  let finalObj = {
           "Потяг №" : getTrainNumber(),
           "Пункт відправлення" : cities[randomCity_A],
           "Пункт прибуття" : cities[randomCity_B],
           "День тижня" : getDepartureDay(),
           "Відправлення" : mergedDepartureTime(),
           "Вартість" :  getTicketPrice()
        };

   return finalObj;
}

var firingCount = prompt('Trains count', 10);
  for(var i = 0; i < firingCount; i++) {
  console.log(result());

  let serialObj = JSON.stringify(result());
  localStorage.setItem("myKey", serialObj);
}

How can i save all created objects in localStorage (it saves only 1 finalObj), and if i can save all objects in other .json file, how to do it? Thank you.

Push all the objects into an array and then save that array to localStorage. — 11thdimension
– 11thdimension, Commented Dec 17, 2017 at 10:45

Mamun · Accepted Answer · 2017-12-17 11:20:17Z

2

You are setting object (serialObj) in the same key (myKey) again and again. That's why the key is only retaining the last object.

Try to create unique key like the following:

var firingCount = prompt('Trains count', 10);
for(var i = 0; i < firingCount; i++) {
   console.log(result());

   let serialObj = JSON.stringify(result());
   localStorage.setItem("myKey" + i, serialObj); // create unique key by appending i to "myKey".
}

edited Dec 17, 2017 at 11:20

answered Dec 17, 2017 at 10:53

Mamun

69k9 gold badges51 silver badges62 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

Mamun Over a year ago

@АртемМирошниченко, You are most welcome. Please accept the answer if it helps.....thanks.

Collectives™ on Stack Overflow

Adding objects to localStorage. JSON

1 Answer 1

1 Comment

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

1 Comment

Your Answer

Sign up or log in

Post as a guest

Related