Function modulo

lib/internal/webidl.js:230–237

* Returns x modulo y for Web IDL ConvertToInt step 10. * * This is intentionally not a general modulo helper. ConvertToInt only calls * it with a positive power-of-two modulus, and the implementation assumes * that. It converts JavaScript remainder into mathematical modulo and * normalizes -0 t

(x, y)

 * @returns {number}
 */
function modulo(x, y) {
  // Web IDL ConvertToInt step 10 uses mathematical modulo.
  const r = x % y;
  if (r === 0) {
    return 0;
  }
  return r > 0 ? r : r + y;
}

/**
 * Returns x modulo y for Web IDL ConvertToInt step 10.