javascript-learning/localStorage-object.html at master · CooperUnion/javascript-learning · GitHub

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<!DOCTYPE html>
<html>
	<head>
		<title>Local Storage</title>
		<script src="http://code.jquery.com/jquery-latest.js"></script>
		<script>
			$(document).ready(function(){

				//give me a random number from 0-100
				var randomNumber = Math.floor(Math.random()*100);

				//give me a random number from 0 - 0.999999999
				var randomValue = Math.random();

				//try to get the stored object
				var numbers = localStorage.getItem("numbers");

				if(numbers === null){
					//if it doesn't exist, create it
					console.log("not an array, creating one");
					numbers = {};
				} else {
					//if it exists, convert the string to an object
					console.log("numbers is an object");
					numbers = JSON.parse(numbers);
				}

				//add a random key, and the random value to it
				numbers[randomNumber] = randomValue;

				//convert the object into a string, and store it
				localStorage.setItem("numbers", JSON.stringify(numbers));

				console.log(numbers);
			});
		</script>
	</head>
	<body>

	</body>
</html>