js获取当前周、上一周、下一周日期

蔚落 2022-10-27 02:31 501阅读 0赞

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
    <html >
    <head>
      <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
      <title>日历操作</title>
      <script>
        window.onload = function(){     
          var cells = document.getElementById('monitor').getElementsByTagName('td');
          var clen = cells.length;
          var currentFirstDate;
          var formatDate = function(date){       
            var year = date.getFullYear()+'年';
            var month = (date.getMonth()+1)+'月';
            var day = date.getDate()+'日';
            var week = '('+['星期天','星期一','星期二','星期三','星期四','星期五','星期六'][date.getDay()]+')'; 
    
            return year+month+day+' '+week;
          };
          var addDate= function(date,n){    
            date.setDate(date.getDate()+n);    
            return date;
          };
          var setDate = function(date){       
            var week = date.getDay()-1;
            date = addDate(date,week*-1);
            currentFirstDate = new Date(date);
    
            for(var i = 0;i<clen;i++){         
              cells[i].innerHTML = formatDate(i==0 ? date : addDate(date,1));
            }        
          };       
          document.getElementById('last-week').onclick = function(){
            setDate(addDate(currentFirstDate,-7));     
          };       
          document.getElementById('next-week').onclick = function(){         
            setDate(addDate(currentFirstDate,7));
          };   
          setDate(new Date());
        }
      </script>
    </head>
    <body>
      <button id="last-week">上一周</button><button id="next-week">下一周</button>
      <table id="monitor">
        <tr>
          <td></td>
          <td></td>
          <td></td>
          <td></td>
          <td></td>
          <td></td>
          <td></td>
        </tr>
      </table>
    </body>
    </html>

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