JS时间戳格式化

• 运行截图
  

• HTML

  <div>
    <button onclick="format()">
       时间格式化
    </button>
    <p>当前时间戳：<span id="s1">--</span></p>
    <p>格式化时间：<span id="s2">--</span></p>
  </div>
  

• javaScript

  function formate(milliseconds,addTime) {
     if (milliseconds == "" || milliseconds == undefined || milliseconds == null) {
       return "";
     }
    let datetime = new Date();
    datetime.setTime(milliseconds);
    let year = datetime.getFullYear();
    let month = formatNum(datetime.getMonth() + 1);
    let date = formatNum(datetime.getDate());
    let hour = formatNum(datetime.getHours());
    let minute = formatNum(datetime.getMinutes());
    let second = formatNum(datetime.getSeconds());
    debugger
    let result = year+"-"+month+"-"+date;
    if(addTime){
      result += " "+hour+":"+minute+":"+second;
    }
    return result;
  }
  
  function formatNum(num) {
    return num < 10 ? "0" + num: num;
  }