Number.NaN

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.

La propiedad Number.NaN representa Not-A-Number (No es numero). Equivalente de NaN.

No tienes que crear un objeto Number para acceder a esta propiedad estática (usa Number.NaN).

Atributos de la propiedad `Number.NaN`
Sobrescribir	No
Numerable	No
Configurable	No

function sanitise(x) {
  if (isNaN(x)) {
    return Number.NaN;
  }
  return x;
}

See Testing against NaN on the NaN page.

Specification
ECMAScript Language Specification # sec-number.nan

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