How to convert a javascript String to an Object

Question

I am getting the variable from a json file that is

var node = data.nodes;

alert(node); returns the following

[{"name" : "30","group": 0} , {"name" : "40","group": 0} ]

which is not an Object

If I assign this value directly to a variable then it is counted as object as you can see below.

var node = [{"name" : "30","group": 0} , {"name" : "40","group": 0} ]

Why is the value not an Object in the first place? What can I do to convert the variable to an Object?

any help would be truly appreciated.

Answer 1

You can use the JSON.parse method to turn the string into an object:

var node = JSON.parse(data.nodes);

Note that some older browsers (eg IE 7) doesn't support the JSON object. You can read more about that on the documentation page that I linked to if you need to support older versions.

Answer 2

Try this:

<script type="text/javascript">
var node = data.nodes //[{"name" : "30","group": 0} , {"name" : "40","group": 0} ]
var data = JSON.parse(node);
console.log(data); //{name: "30", group: 0}, {name: "40", group: 0}
console.log(data[0]); //{name: "30", group: 0}
</script>