AI solution for JavaScript Quiz on BFE.dev
92. NaN

The code below outputs:

false
false
true
-1
true
NaN
NaN
NaN

Explanation:

• NaN == NaN returns false because NaN is not equal to any value, not even itself.
• NaN === NaN also returns false for the same reason.
• Object.is(NaN, NaN) returns true because it is a special comparison operator that treats NaN as equal to itself.
• [NaN].indexOf(NaN) returns -1 because the indexOf() method uses === to compare values, which returns false for NaN === NaN.
• [NaN].includes(NaN) returns true because it uses the same comparison as Object.is(), and considers NaN equal to itself.
• Math.max(NaN, 1) returns NaN because any comparison operation involving NaN results in NaN.
• Math.min(NaN, 1) returns NaN for the same reason.
• Math.min(NaN, Infinity) also returns NaN because any comparison operation involving NaN results in NaN.