static S subBot_html_webSocketBasedLogView() {
  ret loadJQuery()
    + hpre("", id := 'logView)
    + hreconnectingWebSockets()
    + hjs_htmlencode()
    + hjavascript([[
      var ws = new ReconnectingWebSocket("${URI}");
      ws.onmessage = function(event) {
        var d = event.data;
        if (d == "clear")
          $("#logView").html("");
        else {
          $("#logView").append(htmlencode(d.substring(1)));
          window.scrollBy(0, 1000000); // keeps X coordinate
        }
      };
    ]].replace("${URI}", subBot_myWebSocketURI());
}