change property name

Question

I have a JavaScript object as follows:

var a = {   Prop1: 'test',   Prop2: 'test2'  } 

How would I change the property name of Prop1 to Prop3?

I tried the following code but it didn't work...

for (var p in r){   p.propertyName = 'Prop3'; } 

Answer 1

That isn't directly possible.

You can just write

a.Prop3 = a.Prop1; delete a.Prop1;