developer-roadmap/roadmaps/javascript/content/samevaluezero@fL3B2hkTgMb0oEwMiWJtK.md

SameValueZero

SameValueZero is an equality algorithm used internally by JavaScript in methods like Array.prototype.includes() and Map key comparison. It behaves like === but treats NaN as equal to itself. Unlike SameValue, it considers +0 and -0 as equal.

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• @article@Same-value-zero equality