I have create an sessionStorage array and have assigned values as shown here. labe

Question

I have created a sessionStorage array named labe and assigned some values as shown below. labe[25,36,42] My key value is labe and I want to change the value from 36 to 87 in sessionStorage itself. How can I do that the same in javascript?

Answer 1

sessionStorage only saves data in string, so when you write something like sessionStorage.setItem('labe', [25,36,42]), [26, 36, 42] will be converted to string '25,36,42' before stored in sessionStorage. That means, you just cannot save an object directly to sessionStorage, or localStorage.

Usually, we do it like this:

sessionStorage.setItem('labe', JSON.stringify([25,36,42]))

and get it back:

var labe = JSON.parse(sessionStorage.getItem('labe')).

Then labe become an array again, so you just change labe[1] from 36 to 38, and save it again:

sessionStorage.setItem('labe', JSON.stringify(labe)).

That's it.

Answer 2

The link below would really help you a lot, please do check it out.

https://www.w3schools.com/jsref/prop_win_sessionstorage.asp

However, this should do the trick.

sessionStorage.setItem("labe", [25, 87,42]]);