An array of strings or a Buffer naming possible ALPN protocols. (Protocols should be ordered by their priority.)命名可能的ALPN协议的字符串数组或缓冲区。（协议应按其优先级排序。）
Optionally enable in-use auto encryption可选启用使用中的自动加密
Optionally override the trusted CA certificates. 可选地覆盖受信任的CA证书。Default is to trust the well-known CAs curated by Mozilla. 默认设置是信任Mozilla管理的知名CA。Mozilla's CAs are completely replaced when CAs are explicitly specified using this option.当使用此选项显式指定CA时，Mozilla的CA将被完全替换。
Cert chains in PEM format. One cert chain should be provided per private key. PEM格式的证书链。每个私钥应提供一个证书链。Each cert chain should consist of the PEM formatted certificate for a provided private key, followed by the PEM formatted intermediate certificates (if any), in order, and not including the root CA (the root CA must be pre-known to the peer, see ca). 每个证书链应按顺序由所提供的私钥的PEM格式证书组成，然后是PEM格式的中间证书（如果有），不包括根CA（根CA必须事先为对等方所知，请参阅CA）。When providing multiple cert chains, they do not have to be in the same order as their private keys in key. 当提供多个证书链时，它们不必与密钥中的私钥顺序相同。If the intermediate certificates are not provided, the peer will not be able to validate the certificate, and the handshake will fail.如果没有提供中间证书，对等方将无法验证证书，握手将失败。
Verifies the certificate 验证证书cert is issued to hostname.cert是否颁发给hostname。
Returns Error object, populating it with 返回Error对象，在失败时用reason, host, and cert on failure. reason、host和cert填充它。On success, returns undefined.成功后，返回undefined。
This function is intended to be used in combination with the此函数旨在与checkServerIdentity option that can be passed to connect and as such operates on a certificate object. checkServerIdentity选项结合使用，该选项可以传递给连接，因此可以在证书对象上运行。For other purposes, consider using 出于其他目的，请考虑改用x509.checkHost() instead.x509.checkHost()。
This function can be overwritten by providing an alternative function as the通过提供另一个函数作为传递给options.checkServerIdentity option that is passed to tls.connect(). tls.connect()的options.checkServerIdentity选项，可以覆盖此函数。The overwriting function can call 覆盖函数当然可以调用tls.checkServerIdentity() of course, to augment the checks done with additional verification.tls.checkServerIdentity()，以通过附加验证来增强所做的检查。
This function is only called if the certificate passed all other checks, such as being issued by trusted CA (仅当证书通过所有其他检查（例如由可信CA（options.ca).options.ca）颁发）时，才调用此函数。
Earlier versions of Node.js incorrectly accepted certificates for a given如果存在匹配的hostname if a matching uniformResourceIdentifier subject alternative name was present (see CVE-2021-44531). uniformResourceIdentifier主题替代名称，则Node.js的早期版本错误地接受给定hostname的证书（请参阅CVE-2021-44531）。Applications that wish to accept希望接受uniformResourceIdentifier subject alternative names can use a customoptions.checkServerIdentity function that implements the desired behavior.uniformResourceIdentifier主题替代名称的应用程序可以使用实现所需行为的options.checkServerIdentity函数。
The host name or IP address to verify the certificate against.要验证证书的主机名或IP地址。
A 表示对等方证书的证书对象。certificate object representing the peer's certificate.
Cipher suite specification, replacing the default. 密码套件规范，替换默认值。For more information, see modifying the default cipher suite. 有关详细信息，请参阅修改默认密码套件。Permitted ciphers can be obtained via tls.getCiphers(). 允许的密码可以通过tls.getCiphers()获得。Cipher names must be uppercased in order for OpenSSL to accept them.密码名称必须大写，OpenSSL才能接受它们。
The time in milliseconds to attempt a connection before timing out.超时前尝试连接的时间（毫秒）。
PEM formatted CRLs (Certificate Revocation Lists).PEM格式的CRL（证书吊销列表）。
Allow a driver to force a Single topology type with a connection string containing one host允许驱动程序强制使用包含一个主机的连接字符串的单一拓扑类型
Allows a wrapping driver to amend the client metadata generated by the driver to include information about the wrapping driver允许包装驱动程序修改由驱动程序生成的客户端元数据，以包括关于包装驱动程序的信息
A string describing a named curve or a colon separated list of curve NIDs or names, for example P-521:P-384:P-256, to use for ECDH key agreement. 描述用于ECDH密钥协议的命名曲线或以冒号分隔的曲线NID或名称列表的字符串，例如P-521:P-384:P-256。Set to auto to select the curve automatically. 设置为自动以自动选择曲线。Use crypto.getCurves() to obtain a list of available curve names. 使用crypto.getCurves()获取可用曲线名称的列表。On recent releases, openssl ecparam -list_curves will also display the name and description of each available elliptic curve. 在最近的版本中，openssl ecparam-list_curves还将显示每个可用椭圆曲线的名称和描述。Default: tls.DEFAULT_ECDH_CURVE.默认值：tls.DEFAULT_ECDH_CURVE。
Force server to assign 强一致性务器分配_id values instead of driver_id值而不是驱动程序
heartbeatFrequencyMS controls when the driver checks the state of the MongoDB deployment. heartheatFrequencyMS控制驱动程序何时检查MongoDB部署的状态。Specify the interval (in milliseconds) between checks, counted from the end of the previous check until the beginning of the next one.指定检查之间的间隔（以毫秒为单位），从上一次检查结束到下一次检查开始。
TCP Connection keep alive enabledTCP连接保持活动已启用
The number of milliseconds to wait before initiating keepAlive on the TCP socket在TCP套接字上启动keepAlive之前等待的毫秒数
Private keys in PEM format. PEM allows the option of private keys being encrypted. PEM格式的私钥。PEM允许选择加密私钥。Encrypted keys will be decrypted with 加密的密钥将使用options.passphrase. options.passphrase进行解密。Multiple keys using different algorithms can be provided either as an array of unencrypted key strings or buffers, or an array of objects in the form 使用不同算法的多个密钥可以作为未加密密钥字符串或缓冲区的数组提供，也可以作为{pem: <string|buffer>[, passphrase: <string>]}. {pem: <string|buffer>[, passphrase: <string>]}形式的对象数组提供。The object form can only occur in an array. 对象形式只能出现在数组中。object.passphrase is optional. object.passphrase是可选的。Encrypted keys will be decrypted with 加密密钥将使用object.passphrase if provided, or options.passphrase if it is not.object.passphrase（如果提供）或options.passphrase（如果不提供前者）进行解密。
The size (in milliseconds) of the latency window for selecting among multiple suitable MongoDB instances.用于在多个合适的MongoDB实例中进行选择的延迟窗口的大小（以毫秒为单位）。
Custom logger object自定义记录器对象
The maximum number of connections that may be in the process of being established concurrently by the connection pool.连接池可能同时建立的最大连接数。
The maximum number of milliseconds that a connection can remain idle in the pool before being removed and closed.在删除和关闭连接之前，连接在池中可以保持空闲的最大毫秒数。
The maximum number of connections in the connection pool.连接池中的最大连接数。
Sets the minimum heartbeat frequency. 设置最小心跳频率。In the event that the driver has to frequently re-check a server's availability, it will wait at least this long since the previous check to avoid wasted effort.如果驱动程序必须频繁地重新检查服务器的可用性，那么它将从上次检查开始至少等待这么长时间，以避免浪费精力。
The minimum number of connections in the connection pool.连接池中的最小连接数。
Enable command monitoring for this client为此客户端启用命令监视
TCP Connection no delayTCP连接无延迟
Shared passphrase used for a single private key and/or a PFX.用于单个私钥和/或PFX的共享密码。
PFX or PKCS12 encoded private key and certificate chain. PFX或PKCS12编码的私钥和证书链。pfx is an alternative to providing key and cert individually. pfx是单独提供密钥和证书的替代方案。PFX is usually encrypted, if it is, passphrase will be used to decrypt it. PFX通常是加密的，如果是，将使用密码来解密。Multiple PFX can be provided either as an array of unencrypted PFX buffers, or an array of objects in the form 多个PFX可以提供为未加密的PFX缓冲区数组，也可以提供为{buf: <string|buffer>[, passphrase: <string>]}. {buf: <string|buffer>[, passphrase: <string>]}形式的对象数组。The object form can only occur in an array. object.passphrase is optional. 对象形式只能出现在数组中。objectpassphrase是可选的。Encrypted PFX will be decrypted with 加密的PFX将使用object.passphrase if provided, or options.passphrase if it is not.object.passphrase（如果提供）或options.passphrase（如果不提供前者）进行解密。
A primary key factory function for generation of custom 用于生成自定义_id keys_id密钥的主键工厂函数
A Promise library class the application wishes to use such as Bluebird, must be ES6 compatible应用程序希望使用的Promise库类（如Bluebird）必须与ES6兼容
Return document results as raw BSON buffers将文档结果作为原始BSON缓冲区返回
If true the server will reject any connection which is not authorized with the list of supplied CAs. 如果为true，则服务器将拒绝未经授权的任何连接。This option only has an effect if requestCert is true.此选项仅在requestCert为true时有效。
Specifies the name of the replica set, if the mongod is a member of a replica set.如果mongod是副本集的成员，则指定副本集的名称。
Enables retryable reads.启用可重试读取。
Enable retryable writes.启用可重试写入。
An optional TLS context object from tls.createSecureContext()tls.createSecurityContext()中的可选TLS上下文对象
Legacy mechanism to select the TLS protocol version to use, it does not support independent control of the minimum and maximum version, and does not support limiting the protocol to TLSv1.3. 选择要使用的TLS协议版本的传统机制，它不支持对最低和最高版本的独立控制，也不支持将协议限制为TLSv1.3。Use minVersion and maxVersion instead. 请改用minVersion和maxVersion。The possible values are listed as SSL_METHODS, use the function names as strings. 可能的值列为SSL_METHOD，使用函数名作为字符串。For example, use 'TLSv1_1_method' to force TLS version 1.1, or 'TLS_method' to allow any TLS protocol version up to TLSv1.3. 例如，使用“TLSv1_1_method”强制TLS版本1.1，或使用“TLS_method”允许TLSv1.3以下的任何TLS协议版本。It is not recommended to use TLS versions less than 1.2, but it may be required for interoperability. 不建议使用低于1.2的TLS版本，但为了实现互操作性，可能需要使用TLS版本。Default: none, see minVersion.默认值：无，请参阅minVersion。
Specifies how long (in milliseconds) to block for server selection before throwing an exception.指定在引发异常之前阻止服务器选择的时间（以毫秒为单位）。
The time in milliseconds to attempt a send or receive on a socket before the attempt times out.在尝试超时之前在套接字上尝试发送或接收的时间（毫秒）。
The maximum number of hosts to connect to when using an srv connection string, a setting of 使用srv连接字符串时要连接到的最大主机数，设置为0 means unlimited hosts0表示不受限制的主机
Modifies the srv URI to look like:将srv URI修改为如下所示：
_{srvServiceName}._tcp.{hostname}.{domainname}
Querying this DNS URI is expected to respond with SRV records查询此DNS URI应以SRV记录响应
If set TLS enabled, equivalent to setting the ssl option.如果启用了设置TLS，相当于设置了ssl选项。
| nodejs option | MongoDB equivalent | type |
|---|---|---|
ca |
sslCA, tlsCAFile |
string | Buffer | Buffer[] |
crl |
sslCRL |
string | Buffer | Buffer[] |
cert |
sslCert, tlsCertificateFile, tlsCertificateKeyFile |
string | Buffer | Buffer[] |
key |
sslKey, tlsCertificateKeyFile |
string | Buffer | KeyObject[] |
passphrase |
sslPass, tlsCertificateKeyFilePassword |
string |
rejectUnauthorized |
sslValidate |
boolean |
Bypasses validation of the certificates presented by the mongod/mongos instance绕过mongod/mongos实例提供的证书验证
Disables hostname validation of the certificate presented by the mongod/mongos instance.禁用mongod/mongos实例提供的证书的主机名验证。
Disables various certificate validations.禁用各种证书验证。
The maximum time in milliseconds that a thread can wait for a connection to become available.线程等待连接可用的最长时间（毫秒）。
An integer that specifies the compression level if using zlib for network compression.如果使用zlib进行网络压缩，则指定压缩级别的整数。
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Mongo Client OptionsMongo客户端选项