❗️Что будет на выходе?

const secretData = { password: 'abc123' };
const mySet = new WeakSet();
mySet.add(secretData);

delete secretData.password;

const checkAccess = (obj) => {
  console.log(mySet.has(obj));
};

checkAccess(secretData);
checkAccess({ password: 'abc123' });

Ответ: true false

JavaScript test | #JavaScript