How do I..Use JSON.stringify() and JSON.parse() with JavaScript

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I'm trying to store and retrieve a very basic obect via JavaScript and JSON - when I run the code below, something gets put into localstorage, but when I click retrieve I just get [object Object] appended to the paragraph. Any ideas? Cheers.

<!DOCTYPE HTML>
<html>
<body>

<script>

function storeusername()
{
	var person = {};
	person.age = 25;
	person.firstname = 'Joe';
	person.lastname = 'Smith';
	localStorage.setItem('persondetails', JSON.stringify(person));
}

function getusername()
{
	document.getElementById('username').innerHTML =  JSON.parse(localStorage.getItem('persondetails'));
}


</script>
<br/>
Name: <p id="username"></p>
<input type=button value="Store" onclick="storeusername()" />
<input type=button value="Retrieve" onclick="getusername()" />
</body>
</html>

Posted 8-Mar-14 2:30am

BrianHamilton

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Maarten Kools · Accepted Answer · 2014-03-08T02:42:00

The reason you're getting [object Object] is because JSON.parse will actually return the object you have serialized, not one of its properties.

For example, if you wish to output the username, use the following:

JavaScript

var person = JSON.parse(localStorage.getItem('persondetails'));
document.getElementById('username').innerHTML = person.firstname + person.lastname; // Or whatever the username is...