Question

What would be the easiest way to determine if a Javascript object has only one specific key-value pair?

For example, I need to make sure that the object stored in the variable text only contains the key-value pair 'id' : 'message'

Answer 1

var keys = Object.keys(text);
var key = keys[0];

if (keys.length !== 1 || key !== "id" || text[key] !== "message")
    alert("Wrong object");