JS写页面不操作则跳出

<script>
jumpOut(0.2)
//判断用户有没有操作页面
   function  jumpOut(time) {
        var userTime = (time || 2) * 60;
        var objTime = {
            init:0,
            time:function(){
                objTime.init += 1;
                if(objTime.init == userTime){
                    alert('打开时间超时');
                 }
            },
            eventFun:function(){
                clearInterval(testUser);
                objTime.init = 0;
                testUser = setInterval(objTime.time,1000);
            }
        }
        var testUser = setInterval(objTime.time,1000);
        var body = document.querySelector('html');
        body.addEventListener("touchstart",objTime.eventFun);
        body.addEventListener("click",objTime.eventFun);

      }
      localStorage.setItem('hi','woshi 1');
      localStorage.setItem('hi','woshi 22222222');
</script>