keyObject.toCryptoKey(algorithm, extractable, keyUsages)

• algorithm <string> | <RsaHashedImportParams> | <EcKeyImportParams> | <HmacImportParams>

• extractable <boolean>
• keyUsages <string[]> 见 主要用途。
• 返回：<CryptoKey>

将 KeyObject 实例转换为 CryptoKey。

🌐 Converts a KeyObject instance to a CryptoKey.