一个用来计算整星期日期的功能代码

2019-11-21 00:16:38

字体：大中小

来源：转载

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效果图:

演示代码:

<html> <head> <title>日期插件</title> </head> <body> <script type="text/javascript"> function myDate() { function formatDate(d) { var _todayDate = d.getDate(); var _year = d.getYear(); !document.addEventListener || (_year += 1900); var _month = d.getMonth()+1; return _year+"-"+_month+"-"+_todayDate; } var now = new Date(), dd = new Date(); var n = now.getDay(); function check(date,m) { for (var i = 0;i < 7; i++) { var datevalue = now.getDate()-n+m+i+1; var month = now.getMonth()+1; if (month == 1 || month == 3 || month == 5 || month == 7 || month == 8 || month == 10 || month == 12) { if (datevalue > 31) { if ( m < 0 && month - 1 != 2) { dd.setDate(31-(30-datevalue)); dd.setMonth(month) } else { dd.setDate(datevalue - 31); dd.setMonth(month); } } else { dd.setDate(datevalue); } } else if (month == 4 || month == 6 || month == 9 || month == 11) { if (datevalue > 30) { if ( m < 0 && month - 1 != 2) { dd.setDate(31-(30-datevalue)); dd.setMonth(month) } else { dd.setDate(datevalue - 30); dd.setMonth(month); } } else { dd.setDate(datevalue); } } else if (month == 2) { if (datevalue > 28) { dd.setDate(datevalue - 28); m >= 0 ? dd.setMonth(month+1) : dd.setMonth(month-1); } else { dd.setDate(datevalue); } } date.push(formatDate(dd)); } } return { currWeek : function () { var date = []; check(date, 0); return date; }, nextWeek : function () { var date = []; check(date, 7); return date; }, prevWeek : function () { var date = []; check(date, -7); return date; } } } var s = new myDate(); document.write("上星期的每天日期："+s.prevWeek()+"<br>"+"本星期的每天日期；"+s.currWeek()+"<br>"+"下星期的每天日期："+s.nextWeek()); </script> </body> </html>

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