As of August 1, 2023, this name is no longer defined by a Web Platform specification
Definition
Direct Sockets API defines TCPSocketOptions
dictionary TCPSocketOptions {
[EnforceRange] unsigned long sendBufferSize;
[EnforceRange] unsigned long receiveBufferSize;
boolean noDelay = false;
[EnforceRange] unsigned long keepAliveDelay;
SocketDnsQueryType dnsQueryType;
};