connect swi-prolog with nodejs through websockets

I am trying to connect swi-prolog with nodejs but, without success. I have looked in the official documentation of swi-prolog but, I see it very confusing.

I have a server in nodejs running on port 8080. What I want is that nodejs receive the messages sent by swi-prolog and that swi-prolog can receive the messages that nodejs send you.

In nodejs I use the module socket.io to handle websockets

In swi-prolog I use the websockets module that already has it by default in the official documentation. I can not understand it very well.

I hope it's not too much to ask for, an example of how to send and receive messages via websocket in swi-prolog .

with the documented code if possible.

This is the code I have done in swi-prolog :

    :- use_module(library(http/websocket)).

    :- use_module(library(http/thread_httpd)).

    :- use_module(library(http/http_dispatch)).

    URL = 'http://localhost:8080',
    http_open_websocket(URL, WS, []),
    ws_send(WS, text('hola mundo!')),
    ws_receive(WS, Reply),
    ws_close(WS, 1000, "Goodbye").

    URL = 'http://localhost:8080',
    WS = <stream>(0xe4a440,0xe4a610),
    Reply = websocket{data:"hola mundo!", opcode:text}.