赋某日期为日期类型 | new Date(myYear,myMonth,myDate);//当myDate为0时,返回当前月份的上月末日期 |
当前日期 now |
new Date() |
当前日期为本周的第几天,星期三返回3 nowDayOfWeek |
now.getDay() |
当前日 nowDay |
now.getDate() |
当前月 nowMonth |
now.getMonth();//0为一月,1为2月,... |
当前年 nowYear |
nowYear = now.getYear(); nowYear += nowYear<2000?1900:0; |
格式化日期:yyyy-MM-dd | function formatDate(date,fmt) { var myyear = date.getFullYear(); var mymonth = date.getMonth()+1; var myweekday = date.getDate(); if(mymonth < 10){ mymonth = "0" + mymonth; } if(myweekday < 10){ myweekday = "0" + myweekday; } return (myyear+"-"+mymonth + "-" + myweekday); } |
格式化日期:任意格式 | function dateFtt(fmt,date) { var o = { "M+" : date.getMonth()+1, //月份 "d+" : date.getDate(), //日 "h+" : date.getHours(), //小时 "m+" : date.getMinutes(), //分 "s+" : date.getSeconds(), //秒 "q+" : Math.floor((date.getMonth()+3)/3), //季度 "S" : date.getMilliseconds() //毫秒 }; if(/(y+)/.test(fmt)) fmt=fmt.replace(RegExp.$1, (date.getFullYear()+"").substr(4 - RegExp.$1.length)); for(var k in o) if(new RegExp("("+ k +")").test(fmt)) fmt = fmt.replace(RegExp.$1, (RegExp.$1.length==1) ? (o[k]) : (("00"+ o[k]).substr((""+ o[k]).length))); return fmt; } |
两个日期间的间隔天数 | function getMonthDays(myMonth){ //此处计算的是一个月的天数 var monthStartDate = new Date(nowYear, myMonth, 1); var monthEndDate = new Date(nowYear, myMonth + 1, 1); var days = (monthEndDate - monthStartDate)/(1000 * 60 * 60 * 24); return days; } |
本周的开始日期 weekStartDate |
new Date(nowYear, nowMonth, nowDay - nowDayOfWeek); |
本周的结束日期 weekEndDate |
new Date(nowYear, nowMonth, nowDay + (6 - nowDayOfWeek)); |
本月初 monthStartDate |
new Date(nowYear, nowMonth, 1); |
now.setDate(1); | |
本月末 monthEndDate |
var = new Date(nowYear, nowMonth, getMonthDays(nowMonth)); |
本月所属季度 nowQuarter |
nowMonth ++; parseInt(nowMonth/3+(nowMonth%3==0?0:1)) |
nowMonth ++; Math.ceil(nowMonth/3) |
|
上月初 lastMonthStart |
new Date(nowYear, lastMonth, 1); |
lastMonthDate = new Date(); lastMonthDate.setDate(1); lastMonthDate.setMonth(lastMonthDate.getMonth()-1) |
|
new Date(myYear,myMonth-1,1) |
|
上月末 lastMonthEnd |
new Date(nowYear, lastMonth, getMonthDays(lastMonth)); |
new Date(myYear,myMonth,0); | |
本季度开始月份 quarterStartMonth |
if(nowMonth<3){ return 0; }else if(2<nowMonth && nowMonth<6){ return 3; }else if(5<nowMonth && nowMonth<9){ return 6; }else{ //if(nowMonth>8){ return 9; } |
本季度的开始日期 quarterStartDate |
new Date(nowYear, quarterStartMonth, 1); |
本季度的结束日期 quarterEndDate |
var quarterEndMonth = quarterStartMonth + 2; var quarterStartDate = new Date(nowYear, quarterEndMonth, getMonthDays(quarterEndMonth)); |
var quarterEndMonth = quarterStartMonth + 2; var quarterStartDate = new Date(nowYear, quarterEndMonth+1, 0); |
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取与今天偏差为o天的日期 | new Date(now.getTime()+o*24*60*60*1000) |
js中date日期的使用总结
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转载自blog.csdn.net/guishifoxin/article/details/81507777
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