We can use a function instead of an array as the

replacer

let room = {
  number: 23
};

let meetup = {
  title: "Conference",
  participants: [{name: "John"}, {name: "Alice"}],
  place: room // meetup references room
};

room.occupiedBy = meetup; // room references meetup

// All the properties (except occupiedBy) are the encoded
document.write( JSON.stringify(meetup, function replacer(key, value) {
  return (key == 'occupiedBy') ? undefined : value;
}));

The function will be called for every

(key, value)

pair and should return the

replaced

value, which will be used instead of the original one. Or

undefined

if the value is to be skipped. ... In our case, we can return

value

“as is” for everything except

occupiedBy

. To ignore

occupiedBy

, the code above returns

undefined

. The result of the code above will be the following:

{"title":"Conference","participants":[{"name":"John"},{"name":"Alice"}],"place":{"number":23}}

As we expected all the values are encoded except

occupiedBy