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Question 12

Which pair of results is produced by Object.is(NaN, NaN) and Object.is(0, -0), respectively?

  1. false for NaN, false for signed zero
  2. true for NaN, false for signed zeroBonne réponse
  3. false for NaN, true for signed zero
  4. true for NaN, true for signed zero

Explication

Object.is regards NaN as the same as itself and distinguishes positive zero from negative zero. Strict equality behaves differently in both special cases, so using its outcomes here would reverse the pair.

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Question 12: Which pair of results is produced by Object.is(NaN, NaN)… · JavaScript Fundamentals · Questena