CODEWITHSUNDEEP
javascriptarrayshtmllocal-storage
reidark
reidark

Reputation: 910

Local Storage Error on array push

I'm doing some tests with local storage. In my tests with array, i was stuck in array part (push).

What i've done:

if (localStorage.myArray) {
    localStorage.myArray.push("Green");
} else {
    localStorage.myArray = ["Red", "Blue"];
}

This returns an error:

Uncaught TypeError: localStorage.myArray.push is not a function

I know the localstorage itens are always string, but i don't know how this works in an array.

Upvotes: 1

Views: 290

Answers (2)

Darx
Darx

Reputation: 1526

if (localStorage.myArray) {
    var myArray = localStorage.myArray.split(',');
    myArray.push("Green");
    localStorage.myArray = myArray;
} else {
   localStorage.myArray = ["Red", "Blue"];
}

Upvotes: 0

Dhiraj
Dhiraj

Reputation: 33618

Since localStorage only takes strings, you would have to convert your arrays to JSON strings using JSON.stringify. Parse the JSON strings to array while performing further operations on the "arrays". Something like this 

if (localStorage.myArray) {
    var myArray = JSON.parse(localStorage.myArray);
    myArray.push("Green");
    localStorage.myArray = JSON.stringify(myArray);
} else {
    localStorage.myArray = JSON.stringify(["Red", "Blue"]);
}

Upvotes: 5

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