简易版时间封装

封装一个时间戳

主要应用：更新博客，评论等尾部带时间

function dateStr(d,sign){ if(!sign){ sign=‘-‘ }else{ sign = sign; } let year = d.getFullYear(), month = d.getMonth()+1, day = d.getDate(), hours = d.getHours(), minutes = d.getMinutes(), seconds = d.getSeconds(); return year + sign + mendZero(month) + sign + mendZero(day) + ‘    ‘ + mendZero(hours)+sign + mendZero(minutes) + sign + mendZero(seconds);
}   字符串补零  function mendZero(num){ return num = num < 10 ? ‘0‘ + num : num; }