var username = "bot";
var password = "123456";
var steamguard = "";

var Steam = require('steam');

var SteamUser = require("steam-user");
var user = new SteamUser();

var SteamTrade = require("steam-trade");
var steamTrade = new SteamTrade();

user.logOn({
    accountName: username,
    password: password,
})


user.on("loggedOn", function(){
    console.log(username + " is succesfully logged in");
    user.setPersona(1);
})

user.on("webSession", function(sessionID, cookies){
    console.log("Web session created with id " + sessionID);
    steamTrade.setCookie(cookies);

});

$("button").click(function{
    //MAKE TRADE
})

<button id="btnTrade" value="Trade" /> <!--Html Markup-->

<script
  src="https://code.jquery.com/jquery-2.2.4.min.js"
  integrity="sha256-BbhdlvQf/xTY9gja0Dq3HiwQF8LaCRTXxZKRutelT44="
  crossorigin="anonymous"></script>

<script>
$(document).ready(function () {
  $("#btnTrade").on("click", function buttonClick(){
    //MAKE TRADE
  });
});
</script>