Question

I have a object that is parsed from JSON, and it always contains only one property but the name of this property (i.e. the key name) changes for each JSON msg.

In IE9+ and other modern browsers, I can use:

value = msg[Object.keys(msg)[0]];

to access the value of this property. However, IE8 does not support keys, so what is a fully compatible way of accessing the value?

Answer 1

You could define such a function :

function getVal(obj) {
  for (var key in obj) return obj[key];
}

and then do

value = getVal(msg);