I'm currectly reading the book
The opening of the Chapter 3
Objects immediately confuses me with a (possible) contradiction. I re-read the two paragraphs at least a dozen of times and am still not sure which part is correct, and which is wrong.
I will definitely try things out in the browser console, but I don't want to miss an important detail in case there's no error nor contradiction in the book. Could anyone clarify me this?
... There is no constraint on the names of new properties or on the values of properties.