As of August 1, 2023, this name is no longer defined by a Web Platform specification
Definition
Direct Sockets API defines TCPSocket
[Exposed=(Window,Worker), SecureContext]
interface TCPSocket {
constructor(DOMString remoteAddress,
unsigned short remotePort,
optional TCPSocketOptions options = {});
readonly attribute Promise<TCPSocketOpenInfo> opened;
readonly attribute Promise<undefined> closed;
Promise<undefined> close();
};