How to store objects in HTML5 localStorage/sessionStorage

Question

I'd like to store a JavaScript object in HTML5 `localStorage`, but my object is apparently being converted to a string. I can store and retrieve primitive JavaScript types and arrays using `localStorage`, but objects don't seem to work. Should they? Here's my code: ``` var testObject = { 'one': 1, 'two': 2, 'three': 3 }; console.log('typeof testObject: ' + typeof testObject); console.log('testObject properties:'); for (var prop in testObject) { console.log(' ' + prop + ': ' + testObject[prop]); } // Put the object into storage localStorage.setItem('testObject', testObject); // Retrieve the object from storage var retrievedObject = localStorage.getItem('testObject'); console.log('typeof retrievedObject: ' + typeof retrievedObject); console.log('Value of retrievedObject: ' + retrievedObject); ``` The console output is ``` typeof testObject: object testObject properties: one: 1 two: 2 three: 3 typeof retrievedObject: string Value of retrievedObject: [object Object] ``` It looks to me lik…

Accepted Answer

Looking at the Apple, Mozilla and Mozilla again documentation, the functionality seems to be limited to handle only string key/value pairs.

A workaround can be to stringify your object before storing it, and later parse it when you retrieve it:

```
var testObject = { 'one': 1, 'two': 2, 'three': 3 };

// Put the object into storage
localStorage.setItem('testObject', JSON.stringify(testObject));

// Retrieve the object from storage
var retrievedObject = localStorage.getItem('testObject');

console.log('retrievedObject: ', JSON.parse(retrievedObject));
```

How to store objects in HTML5 localStorage/sessionStorage

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