Invalid array length in Javascript

Question

I encounter a Range Error when trying to run my code,

//earlier in the file
var yesArray = ["dummy"];


var numyesVote;
numyesVote = JSON.parse(localStorage.getItem("yesArray"));
//The error takes place here
numyesVote.length = numyesVote;

I'm unsure of how anything could be creating a negative, or massive number. Could it be becoming undefined? (my original declarations for the variables take place in if statements)

Show how you store the "yesArray" item in localStorage - you may be doing it wrong ... is it something like localStorage.setItem("yesArray", JSON.stringify(yesArray)) — Jaromanda X
– Jaromanda X, Commented Dec 6, 2016 at 4:36
ooh, I just saw what you are doing ... nevermind how you store it, you're clearly doing something wrong there — Jaromanda X
– Jaromanda X, Commented Dec 6, 2016 at 4:40
Could you elaborate? I'm a little confused. My setting of it is localStorage.setItem("yesArray", JSON.stringify(yesArray)); — Sausejii
– Sausejii, Commented Dec 6, 2016 at 4:51

Jordan Soltman · Accepted Answer · 2016-12-06 04:40:27Z

2

Maybe you mean to do the opposite?

numyesVote = numyesVote.length;

edited Dec 6, 2016 at 4:40

answered Dec 6, 2016 at 4:35

Jordan Soltman

3,95322 silver badges33 bronze badges

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

Comments

Rohìt Jíndal · Accepted Answer · 2016-12-06 07:39:33Z

0

Make sure you also follow the same approach.

JSON.parse only come in picture if you are storing the data in local storage as a JSON string.

var yesArray = ["abc","xyz"];

localStorage.setItem("yesArray", JSON.stringify(yesArray));

var getArray = JSON.parse(localStorage.getItem("yesArray"));

console.log(getArray.length); // 2

edited Dec 6, 2016 at 7:39

answered Dec 6, 2016 at 7:29

Rohìt Jíndal

27.4k16 gold badges80 silver badges133 bronze badges

Collectives™ on Stack Overflow

Invalid array length in Javascript

2 Answers 2

Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related