How would you add a property to a list of properties without having to manually rewrite it at it's core?

Question

How would you add an object to a list of objects
Example:
var p1 = {"Name": "Bryan", "Age": 12}
/*Now I want to add the property "Race" without having to manually do it... How would I do that?*/

Answer 1

I think you can just do p1.property = value, this should add a new property if it's new in the object.