Q. If we have an object r and want to know if it is a Range object, we can write:

  • (A) r typeof Range
  • (B) r is Range
  • (C) r equals Range
  • (D) r instanceof Range
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✅ Correct Answer: (D) r instanceof Range
Explanation: The r instanceof Range returns true if r inherits from Range.prototype. The instanceof operatory does not actually check whether r was initialized by the Range constructor.

Published by Mr. Dubey ⭐ 111.54K Points at 28-Apr-2024 06:59 pm in JavaScript

Explanation by: Mr. Dubey
The r instanceof Range returns true if r inherits from Range.prototype. The instanceof operatory does not actually check whether r was initialized by the Range constructor.

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