This doesn't make the target object read-only - it just returns a reference to it. data = {one: "one"} ref = makeRef(data) ref().two = "two" data

This doesn't make the target object read-only - it just returns a reference to it. data = {one: "one"} ref = makeRef(data) ref().two = "two" data => Object {one: "one", two: "two"}