how to change name of value in nodejs code example

Example 1: renemane object key js

obj = { name: 'Bobo' } //key: value
obj.newName = obj.name // on object create new key name. Assign old value to this
delete obj.name //delete object with old key name

Example 2: javscript rename property name

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