method SubtleCrypto.exportKey SubtleCrypto.exportKey(format: "jwk", key: CryptoKey): Promise<JsonWebKey> SubtleCrypto.exportKey(format: Exclude<KeyFormat, "jwk">, key: CryptoKey): Promise<ArrayBuffer> Parameters format: "jwk" key: CryptoKey Return Type Promise<JsonWebKey> Parameters format: Exclude<KeyFormat, "jwk"> key: CryptoKey Return Type Promise<ArrayBuffer>