// time let time = document.getElementsByClassName('time')[0]; function startTime() { var today = new Date();//定义日期对象 var yyyy = today.getFullYear();//通过日期对象的getFullYear()方法返回年 var MM = today.getMonth() + 1;//通过日期对象的getMonth()方法返回年 var dd = today.getDate();//通过日期对象的getDate()方法返回年 var hh = today.getHours();//通过日期对象的getHours方法返回小时 var mm = today.getMinutes();//通过日期对象的getMinutes方法返回分钟 var ss = today.getSeconds();//通过日期对象的getSeconds方法返回秒 // 如果分钟或小时的值小于10,则在其值前加0,比如如果时间是下午3点20分9秒的话,则显示15:20:09 MM = checkTime(MM); dd = checkTime(dd); mm = checkTime(mm); ss = checkTime(ss); var day; //用于保存星期(getDay()方法得到星期编号) if (today.getDay() == 0) day = "星期日 " if (today.getDay() == 1) day = "星期一 " if (today.getDay() == 2) day = "星期二 " if (today.getDay() == 3) day = "星期三 " if (today.getDay() == 4) day = "星期四 " if (today.getDay() == 5) day = "星期五 " if (today.getDay() == 6) day = "星期六 " time.innerHTML = yyyy + "-" + MM + "-" + dd + " " + day + hh + ":" + mm + ":" + ss + " "; setTimeout('startTime()', 1000);//每一秒中重新加载startTime()方法 } function checkTime(i) { if (i < 10) { i = "0" + i; } return i; } startTime()
标签:动态显示,checkTime,定时器,js,日期,getDay,var,day,today From: https://www.cnblogs.com/sun-shuaichao/p/16720458.html