keyObject.toCryptoKey(algorithm, extractable, keyUsages)

• algorithm：<AlgorithmIdentifier> | <RsaHashedImportParams> | <EcKeyImportParams> | <HmacImportParams>

• extractable：<boolean>

• keyUsages：<string[]> 参见 关键用法。

  ¥keyUsages: <string[]> See Key usages.

• 返回：<CryptoKey>

  ¥Returns: <CryptoKey>

将 KeyObject 实例转换为 CryptoKey。

¥Converts a KeyObject instance to a CryptoKey.