Function getCryptoKeyUsagesFromSlots

lib/internal/crypto/keys.js:1209–1216

* Returns the CryptoKey's cached canonical usages array for internal * consumers, expanding it from the native usage mask on first access. * @param {Array} slots * @returns {string[]}

(slots)

 * @returns {string[]}
 */
function getCryptoKeyUsagesFromSlots(slots) {
  let usages = slots[kSlotUsages];
  if (usages === undefined) {
    usages = getUsagesFromMask(slots[kSlotUsagesMask]);
    slots[kSlotUsages] = usages;
  }
  return usages;
}

/**
 * Returns the CryptoKey's `[[usages]]` internal slot, bypassing the