根据已知日期取日期 星期 

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8" />
    <title>Document</title>
</head>
<body>
    
</body>

        <script>

var a='2020-02-28';//选择的日志

const today = new Date(a)//以选择的日期 实例化一个时间对象

var days=new Array();

  var Y = today.getFullYear() ;//年
        var M = today.getMonth()+1; //月
        if(M<10){
            M='0'+M;
        }
        var D = today.getDate() ;//日
         if(D<10){
            D='0'+D;
        }

days[0] = Y+'-'+M+'-'+D;   //放入数组
for(var i=1;i<=14;i++){

today.setDate(today.getDate() + 1)        //加上相应的天数

  Y = today.getFullYear() ;//年
         M = today.getMonth()+1; //月
         if(M<10){
            M='0'+M;
        }

         D = today.getDate() ;//日       
         if(D<10){
            D='0'+D;
        }

days[i] = Y+'-'+M+'-'+D;   //放入数组     

}
alert(days);
console.log(days);
console.log(a);
var weekarry=[];
getWeek(days);
function isNull(object){ 
    if(object == null || typeof object == "undefined"){ 
        return true; 
    } 
    return false; 
};


function getWeek(dateString){
    var date;
    if(isNull(dateString)){
        date = new Date();
    }else{
        for(let i=0;i<days.length;i++){
             var dateArray = dateString[i].split("-");
            // console.log(dateArray);
            date = new Date(dateArray[0], parseInt(dateArray[1] - 1), dateArray[2]);

             weekarry.push("星期" + "日一二三四五六".charAt(date.getDay()));
        }
        alert(weekarry);
       
    }
    //var weeks = new Array("日", "一", "二", "三", "四", "五", "六");
    //return "星期" + weeks[date.getDay()];
   
};


</script>


</html>

 

posted @ 2020-07-29 09:22  Jinsuo  阅读(136)  评论(0)  编辑  收藏  举报