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Question 68

base.rank is 1, and item inherits from base without defining rank itself. What does Object.hasOwn(item, "rank") return?

  1. 1, because it returns the inherited value
  2. undefined, because it returns the missing own value
  3. true, because inherited properties count as owned
  4. false, because rank is not item's own propertyCorrect answer

Explanation

Object.hasOwn examines only properties belonging directly to the supplied object, so an inherited rank does not qualify. A true result based on prototype lookup would describe the in operator instead.

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Question 68: base.rank is 1, and item inherits from base without… · JavaScript Fundamentals · Questena