exampleClient.js

#!/usr/bin/env node
var WebSocketClient = require("websocket").client;

var client = new WebSocketClient();

client.on("connectFailed", function (error) {
  console.log("Connect Error: " + error.toString());
});

client.on("connect", function (connection) {
  console.log("WebSocket Client Connected");
  connection.on("error", function (error) {
    console.log("Connection Error: " + error.toString());
  });
  connection.on("close", function () {
    console.log("echo-protocol Connection Closed");
  });
  connection.on("message", function (message) {
    if (message.type === "utf8") {
      console.log("Received: '" + message.utf8Data + "'");
    }
  });

  function sendNumber() {
    if (connection.connected) {
      var number = Math.round(Math.random() * 0xffffff);
      console.log(`sending number: ${number}`);
      connection.sendUTF(number.toString());
      setTimeout(sendNumber, 1000);
    }
  }
  // sendNumber();
});

// client.connect('ws://159.122.217.91/ws', 'echo-protocol');
client.connect("ws://localhost:8080", "echo-protocol");