js 当前时间刷新

<p>每隔1秒钟，打印当前时间</p>

<div id="time"></div>

<script>

function printTime(){
  var d = new Date();
  var h= d.getHours();
  var m= d.getMinutes();
  var s= d.getSeconds();
  document.getElementById("time").innerHTML= h+":"+m+":"+s;

}

var t = setInterval(printTime,);

</script>

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