Why is the webscoket connection being closed?

Question

JavaScript

Page A establishes a webscoket connection. Now, when I go to page B, which also establishes a webscoket connection, my server crashes with a websocket: close 1001 (going away) error .
In the console in the browser it gives "failed: Error in connection establishment: net::ERR_CONNECTION_REFUSED"
js code

var socket = new WebSocket("ws://localhost:8080/ws" );
socket.onmessage = function (event) {
    DownloadScene(event)
}
socket.onclose =function (err){
    console.log(err)
}
socket.onerror = function(error) {
    console.log('WebSocket Error: ' + error);
}
function DownloadScene(event) {
    var data = JSON.parse(event.data)
    document.getElementById(data.id).innerHTML = data.body;
}
function  loadScene(scene) {
    var page = {
        query_type:"loadScene",
        data : {temp:scene}
    }
    var event = JSON.stringify(page);
    socket.send(event);
}

I also use the code above on page B. How can I make it reconnect?
Top handler:

func WebSocketConnect(w http.ResponseWriter,r *http.Request)  {
  conn,err := upGrader.Upgrade(w, r, nil)
  //defer conn.Close()
  if err != nil {
    log.Println("here")
    log.Println(err)

  }

    webSocketHandler(conn)

}
func webSocketHandler(conn *websocket.Conn) {

  println("new connect")
  err := conn.ReadJSON(&query)
  if err != nil {
    log.Fatal(err)
    return
  }
  switch query.QueryType {
  case model.LoadSceneQuery :
    err := json.Unmarshal(query.Data,&frame)
    if err!= nil{
      log.Fatal(err)
    }
    LoadFrame(frame.Temp,conn,nil)
  case model.LoadFrameQuery:
    break
  }
}

It seems to me that a script is needed that would start the connection again, but in js I can not (.

Answer 1

The solution turned out to be simple), you need to replace log.Fatal(err) with log.Println(err) or something else. Every time the page is reloaded, the websocket connection is closed, so websocket: close 1001 (going away). this is the norm).