Accessing JSON object keys having spaces

The way to do this is via the bracket notation.

var test = {
    "id": "109",
    "No. of interfaces": "4"
}
alert(test["No. of interfaces"]);

For more info read out here:

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Working_with_Objects

The answer of Pardeep Jain can be useful for static data, but what if we have an array in JSON?

For example, we have i values and get the value of id field

alert(obj[i].id); //works!

But what if we need key with spaces?

In this case, the following construction can help (without point between [] blocks):

alert(obj[i]["No. of interfaces"]); //works too!

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