每當我刷新地圖，地圖已經更新了
但他舊有function的計時器依然會執行，無法關閉
且也不聽指令onmousemove = resetTimer;(如果滑鼠移動，正常會重製倒數時間)
新執行的function map()會正常運行
(如下方圖片，會出現兩次倒數數字)

我該如何關閉舊的function map()?
好讓setInterval不會重複執行

/*自動計時*/
function (chart) {
    var time,
    sessionTimeout = 7,
    remainingTime = sessionTimeout,
    intervalHandle,
    lastPos = [0, 0];
    function displaySessionTimeout() {
        console.log(remainingTime);
    function updateTimer() {
        remainingTime -= 1;
        if (remainingTime >= 0) {
            displaySessionTimeout()
        } else {
            clearInterval(intervalHandle);
            displaySessionTimeout();                 
            restEventArea();
    function resetTimer(e) {
        if (e.clientX !== lastPos[0] || e.clientY !== lastPos[1]) {
        lastPos = [e.clientX, e.clientY];
        remainingTime = sessionTimeout;
        displaySessionTimeout();
    intervalHandle = setInterval(updateTimer, 1000);
    document.onmousemove = resetTimer;
    document.onkeypress = resetTimer;
    displaySessionTimeout();                                            
let myTimer = null;
const btnStart = document.getElementById('start');
const btnReset = document.getElementById('reset');
btnStart.addEventListener('click', () => {
  myTimer = setInterval(() => console.log(Date.now()), 1000);
btnReset.addEventListener('click', () => {
  if (myTimer) {
    clearInterval(myTimer);