这篇文章主要介绍了原生JavaScript实现日历功能代码实例(无引用Jq),文中通过示例代码介绍的非常详细，对大家的学习或者工作具有一定的参考学习价值,需要的朋友可以参考下

成品显示，可左右切换月份

html 代码

移动端日历

css代码

*{

margin: 0;

padding: 0;

}

/*清除浮动代码*/

.clearfloat:after{display:block;clear:both;content:"";visibility:hidden;height:0}

.clearfloat{zoom:1}

#calendarElement{

margin: 100px auto;

width: 80%;

box-shadow: 0 0 10px #999999;

}

#calendarElement>.header{

height: 80px;

background-color: coral;

display: flex;

border-bottom: 1px solid #fff;

}

#calendarElement>.header .prev{

width: 20%;

position: relative;

}

#calendarElement>.header .prev i{

width: 20px;

height: 20px;

display: block;

position: absolute;

left: 50%;

top: 50%;

margin-top: -10px;

margin-left: -10px;

transform: rotate(45deg);

border: 2px solid #fff;

border-right: none;

border-top: none;

}

#calendarElement>.header .next{

position: relative;

}

#calendarElement>.header .next i{

width: 20px;

height: 20px;

display: block;

position: absolute;

left: 50%;

top: 50%;

margin-top: -10px;

margin-left: -10px;

transform: rotate(45deg);

border: 2px solid #fff;

border-left: none;

border-bottom: none;

}

#calendarElement>.header .date{

width: 60%;

font-size: 22px;

line-height: 80px;

color: #fff;

text-align: center;

}

#calendarElement>.header .next{

width: 20%;

}

#calendarElement>.content >.week{

box-sizing: border-box;

width: 100%;

height: 40px;

color: #fff;

display: flex;

padding: 0 1%;

}

#calendarElement>.content >.week >div{

width: 14%;

text-align: center;

line-height: 40px;

}

#calendarElement>.content >.weekMany{

padding-top: 5px;

padding-bottom: 15px;

}

#calendarElement>.content >.weekMany>div{

float: left;

width: 14.28%;

height: 40px;

text-align: center;

line-height: 40px;

font-size: 14px;

}

#calendarElement>.content >.weekMany>.otherMonth{

color: #999999

}

JS代码

var currentTime=""; //当前时间年月日

var dom=document.querySelector("#calendarElement"); //承载元素

var color="";

getCurrentTime();

randomColor();

showDay();

function getCurrentTime(){ //获取当前时间

var time=new Date();

var year=time.getFullYear();

var month=time.getMonth()+1;

var day=time.getDate();

if(month<10){

month="0"+month

}

var data=year+ "-" +month;

currentTime=year+ "-" +month+"-"+day;

document.querySelector(".date").innerHTML=data;

};

dom.addEventListener("click",function(e){

if(e.target.className=="previ" || e.target.className=="prev"){

getMonths("prev")

}else if(e.target.className=="nexti" || e.target.className=="next"){

getMonths("next")

}

})

function showDay(){

var html="";

var MonthOne=currentTime;

var yearMonth=currentTime.split('-').slice(0,2);

yearMonth=yearMonth.join('-');

document.querySelector(".date").innerHTML=yearMonth;

MonthOne=MonthOne.split('');

MonthOne.splice(8,2,"01")

MonthOne=MonthOne.join('');

var monthLen=getMonthLength(MonthOne); //每月有多少天

var weekMany=new Date(MonthOne).getDay(); //每月一号是星期几

html+=getPrevMonthHtml(weekMany);

html+=getNowMonthHtml(monthLen);

html+=getNextMonthHtml(weekMany,monthLen);

document.querySelector(".weekMany").innerHTML=html;

}

function getPrevMonthHtml(weekMany){

var html="";

var lastMonth=currentTime.substring(0, 7); //得出年月

lastMonth=lastMonth.split('-')

if(lastMonth[1]-1==0){

lastMonth[1]=12;

lastMonth[0]=lastMonth[0]-1;

}else if(lastMonth[1]-1<10){

lastMonth[1]="0"+(lastMonth[1]-1);

}

lastMonth=lastMonth.join('-');

var monthLen=getMonthLength(lastMonth);

var start=monthLen-weekMany;

for(var i=start+1;i<=monthLen;i++){

html+='

';

}

return html;

}

function getNowMonthHtml(monthLen){

var html="";

var MonthOne=currentTime.substring(0, 7); //得出年月

var today=currentTime.split('-')[2];

for(var i=1;i<=monthLen;i++){

if(i<10){

var q="0"+i;

}else{

var q=i;

}

if(i==today){

html+='

';

}else{

html+='

';

}

}

return html;

}

function getNextMonthHtml(weekMany,monthLen){

var html="";

var daynum=weekMany+monthLen;

if(daynum%7==0){

return html;

}else{

var num=daynum%7;

var lessNum=7-num; //差几天

var lowerMonth=currentTime.substring(0, 7); //得出年月

lowerMonth=lowerMonth.split('-')

if(lowerMonth[1]+1==13){

lowerMonth[1]="0"+1;

lowerMonth[0]=+lowerMonth[0]+1;

}else{

lowerMonth[1]=+lowerMonth[1]+1;

if(lowerMonth[1]<10){

lowerMonth[1]="0"+lowerMonth[1];

}

}

lowerMonth=lowerMonth.join('-');

for(var i=1;i<=lessNum;i++){

if(i<10){

var q="0"+i

}

html+='

';

}

}

return html;

}

function getMonths(around){

if(around=="prev"){

currentTime=currentTime.split('-');

currentTime[1]=currentTime[1]-1;

if(currentTime[1]==0){

currentTime[1]="12"

currentTime[0]=+currentTime[0]-1

}

if(currentTime[1]<10){

currentTime[1]="0"+currentTime[1]

}

currentTime=currentTime.join('-');

showDay();

}else if(around=="next"){

currentTime=currentTime.split('-');

currentTime[1]=+currentTime[1]+1;

if(currentTime[1]==13){

currentTime[1]="1"

currentTime[0]=+currentTime[0]+1

}

if(currentTime[1]<10){

currentTime[1]="0"+currentTime[1]

}

currentTime=currentTime.join('-');

showDay();

}

}

function getMonthLength(date) { // 获取每月有多少天

let d = new Date(date)

// 将日期设置为下月一号

d.setMonth(d.getMonth()+1)

d.setDate('1')

// 获取本月最后一天

d.setDate(d.getDate()-1)

return d.getDate()

}

function randomColor(){ //随机颜色

color = '#'+Math.floor(Math.random()*16777215).toString(16);

if(color.length==6){

color+="0"

}

document.querySelector(".header").style.backgroundColor=color;

document.querySelector(".week").style.backgroundColor=color;

};

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