前端时间戳----当前时间xx年xx月xx日xx时xx分xx秒

<script>
  var t = null;
  t = setTimeout(time, 1000);
  function time() {
    clearTimeout(t);
    //  清除定时器
    dt = new Date();
    var y =dt.getFullYear();
    var mt =dt.getMonth() + 1;
    var day =dt.getDate();
    var h =dt.getHours();
    var m =dt.getMinutes();
    var s =dt.getSeconds();
    document.querySelector(".showTime").innerHTML = 
    "当前时间：" +
    y +
    "年" +
    mt+
    "月"+
    day+
    "日" +
    h +
    "时" +
    m+
    "分"+
    s+
    "秒";
    t = setTimeout(time,1000);
  }
</script>