Function isNegativeNaN

packages/utils/src/helpers.ts:344–354

(val: number)

}

export function isNegativeNaN(val: number): boolean {
  if (!Number.isNaN(val)) {
    return false
  }
  const f64 = new Float64Array(1)
  f64[0] = val
  const u32 = new Uint32Array(f64.buffer)
  const isNegative = u32[1] >>> 31 === 1

  return isNegative
}

function toString(v: any) {
  return Object.prototype.toString.call(v)