1、js获取当前日期(yyyy-mm-dd)

以下代码是获取到的当前日期：

var myDate = new Date();

var year = myDate.getFullYear(); //获取完整的年份(4位,1970-????)

var month = myDate.getMonth()+1; //获取当前月份(1-12)

var day = myDate.getDate(); //获取当前日(1-31)

//获取完整年月日

var newDay = year + “-” + month + “-” + day;

2、点击实现日期的天数加减(yyyy-mm-dd)

点击俩个按钮分别可以实现日期的加减，如果本月天数达到最多，那么月份将会自动增加或减少

var n = 0;

dayChange(0)

$("#time-add").click(function(){

n++;

dayChange(n);

})

$("#time-less").click(function(){

n--;

dayChange(n);

})

function dayChange(n){

var now = new Date();//今天

var tomo = new Date((now/1000+86400*n)*1000);//明天

var month = tomo.getMonth() + 1;

var strDate = tomo.getDate();

var seperator1 = "-";

if (month >= 1 && month <= 9) {

month = "0" + month;

}

if (strDate >= 0 && strDate <= 9) {

strDate = "0" + strDate;

}

var currentdate = tomo.getFullYear() + seperator1 + month + seperator1 + strDate;

$(".center-day").html(currentdate);

}

3、获取当前本周周一和本周周日的时间范围

不管当前是周几，都可以获取到当前所在这一周的起始时间

var now = new Date();//今天

week(now);

function week(now){

var nowTime = now.getTime() ;

var day = now.getDay();

var oneDayLong = 24*60*60*1000 ;

//获取本周所在周一

var MondayTime = nowTime - (day-1)*oneDayLong ;

//获取本周所在周末

var SundayTime = nowTime + (7-day)*oneDayLong ;

//转化日期

var monday = new Date(MondayTime);

var sunday = new Date(SundayTime);

var month = monday.getMonth() + 1;

var strDate = monday.getDate();

var month1 = sunday.getMonth() + 1;

var strDate1 = sunday.getDate();

if (month >= 1 && month <= 9) {

month = "0" + month;

}

if (month1 >= 1 && month1 <= 9) {

month1 = "0" + month1;

}

if (strDate >= 0 && strDate <= 9) {

strDate = "0" + strDate;

}

if (strDate1 >= 0 && strDate1 <= 9) {

strDate1 = "0" + strDate1;

}

currentdate = monday.getFullYear() + seperator1 + month + seperator1 + strDate + "至" + sunday.getFullYear() + seperator1 + month1 + seperator1 + strDate1;

$(".center-day").html(currentdate);

32}

4、点击实现每周范围的变化

点击改变的按钮将会改变显示一周范围的改变，如果有的在下一月或者下一年，那么将会自动显示，不会出现错误

var now = new Date();//今天

var n = 0;

week(now);

$("#week-add").click(function(){

n++;

var date = new Date(now.getTime() + n*7*24*3600*1000);

week(date);

})

$("#week-add").click(function(){

n--;

var date = new Date(now.getTime() + n*7*24*3600*1000);

week(date);

})

function week(now){

var nowTime = now.getTime() ;

var day = now.getDay();

var oneDayLong = 24*60*60*1000 ;

//获取本周所在周一

var MondayTime = nowTime - (day-1)*oneDayLong ;

//获取本周所在周末

var SundayTime = nowTime + (7-day)*oneDayLong ;

22//转化日期

var monday = new Date(MondayTime);

var sunday = new Date(SundayTime);

var month = monday.getMonth() + 1;

var strDate = monday.getDate();

var month1 = sunday.getMonth() + 1;

var strDate1 = sunday.getDate();

if (month >= 1 && month <= 9) {

month = "0" + month;

}

if (month1 >= 1 && month1 <= 9) {

month1 = "0" + month1;

}

if (strDate >= 0 && strDate <= 9) {

strDate = "0" + strDate;

}

if (strDate1 >= 0 && strDate1 <= 9) {

strDate1 = "0" + strDate1;

}

currentdate = monday.getFullYear() + seperator1 + month + seperator1 + strDate + "至" + sunday.getFullYear() + seperator1 + month1 + seperator1 + strDate1;

$(".center-day").html(currentdate);

}

5、获取当前月份的第一天和最后一天

能够获取到当前所在月份的第一天和最后一天，最后一天的日期是不固定的，能够获取到应有的日期

monthfen(0)

function monthfen(n){

var now = new Date();//今天

var firstDate = new Date((now/1000+86400*n*now.getDate())*1000);//明天

//本月第一天

firstDate.setDate(1); //第一天

var date = new Date(firstDate);

var month = date.getMonth() + 1;

var strDate = "0" + date.getDate();

//本月最后一天

var endDate = new Date(firstDate);

endDate.setMonth(firstDate.getMonth()+1);

endDate.setDate(0);

var date1 = new Date(endDate);

var month1 = date1.getMonth() + 1;

var strDate1 = date1.getDate();

if (month >= 1 && month <= 9) {

month = "0" + month;

}

if (month1 >= 1 && month1 <= 9) {

month1 = "0" + month1;

}

currentdate = date.getFullYear() + seperator1 + month + seperator1 + strDate + "至" + date1.getFullYear() + seperator1 + month1 + seperator1 + strDate1;

$(".center-day").html(currentdate);

}

6、点击实现当前月份的改变

点击按钮会实现当前月份的改变，那么最后一天的日期也会自动改变，

monthfen(0)

var n = 0;

$("#month-add").click(function(){

n++;

monthfen(n);

})

$("#month-less").click(function(){

n--;

monthfen(n);

})

function monthfen(n){

var now = new Date();//今天

var firstDate = new Date((now/1000+86400*n*now.getDate())*1000);//明天

//本月第一天

firstDate.setDate(1); //第一天

var date = new Date(firstDate);

var month = date.getMonth() + 1;

var strDate = "0" + date.getDate();

//本月最后一天

var endDate = new Date(firstDate);

endDate.setMonth(firstDate.getMonth()+1);

endDate.setDate(0);

var date1 = new Date(endDate);

var month1 = date1.getMonth() + 1;

var strDate1 = date1.getDate();

if (month >= 1 && month <= 9) {

month = "0" + month;

}

if (month1 >= 1 && month1 <= 9) {

month1 = "0" + month1;

}

currentdate = date.getFullYear() + seperator1 + month + seperator1 + strDate + "至" + date1.getFullYear() + seperator1 + month1 + seperator1 + strDate1;

$(".center-day").html(currentdate);

}

当然还有很多关于日期格式的改变和算法，如果有什么不理解的可以留下评论，大家一起探讨。

以上这篇js实现日期显示的一些操作(实例讲解)就是小编分享给大家的全部内容了，希望能给大家一个参考，也希望大家多多支持脚本之家。