method SubtleCrypto.deriveBits SubtleCrypto.deriveBits(algorithm: AlgorithmIdentifier | HkdfParams | Pbkdf2Params | EcdhKeyDeriveParams,baseKey: CryptoKey,length: number,): Promise<ArrayBuffer> Parameters algorithm: AlgorithmIdentifier | HkdfParams | Pbkdf2Params | EcdhKeyDeriveParams baseKey: CryptoKey length: number Return Type Promise<ArrayBuffer>