一、得到今天、昨天、明天日期
function getDate(dates) { var dd = new Date(); var n = dates || 0; dd.setDate(dd.getDate() + n); var y = dd.getFullYear(); var m = dd.getMonth() + 1; var d = dd.getDate(); m = m < 10 ? "0" + m: m; d = d < 10 ? "0" + d: d; var day = y + "-" + m + "-" + d; return day; }; getDate(dates) //dates为数字类型,0代表今日,-1代表昨日,1代表明日,返回yyyy-mm-dd格式字符串,dates不传默认代表今日。
二、得到本周、上周、下周的起始、结束日期
function getMonday(type, dates) { var now = new Date(); var nowTime = now.getTime(); var day = now.getDay(); var longTime = 24 * 60 * 60 * 1000; var n = longTime * 7 * (dates || 0); if (type == "s") { var dd = nowTime - (day - 1) * longTime + n; }; if (type == "e") { var dd = nowTime + (7 - day) * longTime + n; }; dd = new Date(dd); var y = dd.getFullYear(); var m = dd.getMonth() + 1; var d = dd.getDate(); m = m < 10 ? "0" + m: m; d = d < 10 ? "0" + d: d; var day = y + "-" + m + "-" + d; return day; }; getMonday(type,dates) //type为字符串类型,有两种选择,"s"代表开始,"e"代表结束,dates为数字类型,不传或0代表本周,-1代表上周,1代表下周 getMonday("s",1) //得到下周一的yyyy-mm-dd格式日期 getMonday("e",1) //得到下周日的yyyy-mm-dd格式日期
三、得到本月、上月、下月的起始、结束日期
function getMonth(type, months) { var d = new Date(); var year = d.getFullYear(); var month = d.getMonth() + 1; if (Math.abs(months) > 12) { months = months % 12; }; if (months != 0) { if (month + months > 12) { year++; month = (month + months) % 12; } else if (month + months < 1) { year--; month = 12 + month + months; } else { month = month + months; }; }; month = month < 10 ? "0" + month: month; var date = d.getDate(); var firstday = year + "-" + month + "-" + "01"; var lastday = ""; if (month == "01" || month == "03" || month == "05" || month == "07" || month == "08" || month == "10" || month == "12") { lastday = year + "-" + month + "-" + 31; } else if (month == "02") { if ((year % 4 == 0 && year % 100 != 0) || (year % 100 == 0 && year % 400 == 0)) { lastday = year + "-" + month + "-" + 29; } else { lastday = year + "-" + month + "-" + 28; }; } else { lastday = year + "-" + month + "-" + 30; }; var day = ""; if (type == "s") { day = firstday; } else { day = lastday; }; return day; }; getMonth(type,months) //type为字符串类型,有两种选择,"s"代表开始,"e"代表结束,months为数字类型,不传或0代表本月,-1代表上月,1代表下月 getMonth("s",1) //得到下月第一天的yyyy-mm-dd格式日期 getMonth("e",1) //得到下月最后一天的yyyy-mm-dd格式日期
四、得到今年、去年、明年的开始、结束日期
function getYear(type, dates) { var dd = new Date(); var n = dates || 0; var year = dd.getFullYear() + Number(n); if (type == "s") { var day = year + "-01-01"; }; if (type == "e") { var day = year + "-12-31"; }; if (!type) { var day = year + "-01-01/" + year + "-12-31"; }; return day; }; getYear(type,dates) //type为字符串类型,有两种选择,"s"代表开始,"e"代表结束,dates为数字类型,不传或0代表今年,-1代表去年,1代表明年 getYear("s",1) //得到明年第一天的yyyy-mm-dd格式日期 getYear("e",1) //得到明年最后一天的yyyy-mm-dd格式日期
转自https://blog.csdn.net/hui_54520/article/details/103158822 这位童学的链接 ,亲测有效,自己也保存下来,方便查用