本篇文章给大家分享的是有关使用原生JS实现相邻月份日历，小编觉得挺实用的，因此分享给大家学习，希望大家阅读完这篇文章后可以有所收获，话不多说，跟着小编一起来看看吧。
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<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>原生JS写的日历月历 - demo by js.alixixi.com</title>
<style type="text/css">
<!--
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#win{position:absolute;z-index:999;top:50%;left:50%;width:400px;height:200px;background:rgba(00, 00, 00, 0.5);margin:-100px 0 0 -200px;display:none;}
#win #otitle{color:#fff;height:33px;padding-left:10px;text-align:left;background:rgba(00, 00, 00, 0.7);}
#win #otitle #otitlestr {float:left;width:200px;height:30px;line-height:30px;}
#win #otitle #close {font-size:24px;width:33px;height:33px;line-height:33px;text-align:center;font-weight:bold;float:right;cursor:pointer;}
#win #showstr {color:#fff;margin:10px;text-align:left;}
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em{font-style: normal;}
ul,li{list-style-type: none;margin:0px;padding:0px;}
#newDate{width:1230px;height:auto;margin:35px auto 0 auto;}
#newDate #nowDate{width:600px;height:600px;float:left;cursor:pointer;}
#newDate #nextDate{width:600px;height:600px;float:right;cursor:pointer;}
#newDate .Header{width:594px;height:50px;background:#e6dcda;border-bottom-width: 1px;border-bottom-style: solid;border-bottom-color: #FFF;position:relative;-moz-user-select:none;-webkit-user-select:none;user-select:none; }
#newDate .c{font-size:24px;font-weight:bold;height:50px;line-height:50px;text-align:center;}
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#newDate .r{font-size:24px;font-weight:bold;height:50px;line-height:50px;position:absolute; top:0px; right:14px;}
#newDate .Weeks{width:595px;height:30px;}
#newDate span{font-weight:bold;width:84px;height:30px;line-height:30px;text-align:center;background:#e6dcda;margin-right:1px;float:left;}
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<style>
#win,#win #otitle{filter: progid:DXImageTransform.Microsoft.gradient(startColorstr=#7f000000,endColorstr=#7f000000);}
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<script type="text/javascript">
window.onload = function(){
function $(id){return typeof id === "string" ? document.getElementById(id) : id;}
function lightBoxShow(title,str)
{
var oWin = $("win");
var oLay = $("overlay");
$("otitlestr").innerHTML = title;
$("showstr").innerHTML = str;
oLay.style.display = "block";
oWin.style.display = "block";
$("close").onclick = function ()
{
oLay.style.display = "none";
oWin.style.display = "none"
}
}
var newDate = document.getElementById("newDate");
var nowDate = document.getElementById("nowDate");
var nextDate = document.getElementById("nextDate");
var nDate = new Date();
if(nDate.getMonth()+1==12){
viewDate(nowDate,nDate.getFullYear(),nDate.getMonth()+1,true);
viewDate(nextDate,nDate.getFullYear()+1,1);
}else{
viewDate(nowDate,nDate.getFullYear(),nDate.getMonth()+1,true);
viewDate(nextDate,nDate.getFullYear(),nDate.getMonth()+2);
}
showBtn();
function viewDate(obj,year,month,bBtn){
var nDate = new Date();
var dayNum = 0;
if(!obj.bBtn){
obj.Header = document.createElement("div");
obj.Header.className = "Header";
obj.appendChild(obj.Header);
var Weeks = document.createElement("div");
Weeks.className = "Weeks";
obj.appendChild(Weeks);
var weeksArr = ['SUN','MON','TUE','WEB','THU','FRI','SAT'];
for(var i=0;i<7;i++){
var nSpan = document.createElement("span");
nSpan.innerHTML = weeksArr[i];
if(i==0 || i==6){
nSpan.style.color = "red";
}
Weeks.appendChild(nSpan);
}
var nUl = document.createElement("ul");
for(var i=0;i<42;i++){
var nLi = document.createElement("li");
nUl.appendChild(nLi);
}
obj.appendChild(nUl);
obj.bBtn = true;
}
obj.Header.innerHTML = ( bBtn ? '<div class="l">＜ <em>'+(month-1)+'</em></div>' : '<div class="r"><em>'+(month+1)+'</em> ＞</div>')+'<div class="c"><em>'+year+'</em>-<em>'+month+'</em></div>';
var aLi = obj.getElementsByTagName("li");
for(var i=0;i<aLi.length;i++){
aLi[i].innerHTML = "";
aLi[i].style.background = "#f5f5f5";
aLi[i].style.color = "#999";
}
if(month==1 || month==3 || month==5 || month==7 || month==8 || month==10 || month==12){
dayNum = 31;
}
else if(month==4 || month==6 || month==9 || month==11){
dayNum = 30;
}
else if(month==2 && isLeapYear(year)){
dayNum = 29;
}
else{
dayNum = 28;
}
nDate.setFullYear(year);
nDate.setMonth(month-1);
nDate.setDate(1);
function Today(){
var tDate = new Date();
var tEm = aLi[i].parentNode.parentNode.getElementsByTagName("em");
var tMonth = parseInt(tEm[2].innerHTML);
var tYear = parseInt(tEm[1].innerHTML);
if(aLi[i].innerHTML == tDate.getDate() && tYear == tDate.getFullYear() && tMonth == tDate.getMonth()+1){
aLi[i].style.color = "#000";
aLi[i].style.background = "#e6dcda";
}
}
switch(nDate.getDay()){
case 0:
for(var i=0;i<dayNum;i++){
aLi[i].innerHTML = i+1;
Today();
}
break;
case 1:
for(var i=0;i<dayNum;i++){
aLi[i+1].innerHTML = i+1;
Today();
}
break;
case 2:
for(var i=0;i<dayNum;i++){
aLi[i+2].innerHTML = i+1;
Today();
}
break;
case 3:
for(var i=0;i<dayNum;i++){
aLi[i+3].innerHTML = i+1;
Today();
}
break;
case 4:
for(var i=0;i<dayNum;i++){
aLi[i+4].innerHTML = i+1;
Today();
}
break;
case 5:
for(var i=0;i<dayNum;i++){
aLi[i+5].innerHTML = i+1;
Today();
}
break;
case 6:
for(var i=0;i<dayNum;i++){
aLi[i+6].innerHTML = i+1;
Today();
}
break;
}
if(month==1 && bBtn){
obj.Header.getElementsByTagName('em')[0].innerHTML = 12;
}
else if(month==12 && !bBtn){
obj.Header.getElementsByTagName('em')[0].innerHTML = 1;
}
}
function isLeapYear(year){
if(year%4==0 && year%100!=0){
return true;
}
else{
if(year%400==0){
return true;
}
else{
return false;
}
}
}
function showBtn(){
var nowEm = nowDate.getElementsByTagName("em");
var nextEm = nextDate.getElementsByTagName("em");
var leftMonth = parseInt(nowEm[0].innerHTML);
var leftYear = parseInt(nowEm[1].innerHTML);
var rightMonth = parseInt(nextEm[0].innerHTML);
var rightYear = parseInt(nextEm[1].innerHTML);
nowEm[0].parentNode.onclick = function(){
if(leftMonth == 12){
viewDate(nowDate,leftYear-1,leftMonth,true);
viewDate(nextDate,leftYear,1);
}
else{
viewDate(nowDate,leftYear,leftMonth,true);
viewDate(nextDate,leftYear,leftMonth+1);
}
showBtn();
};
nextEm[0].parentNode.onclick = function(){
if(rightMonth == 1){
viewDate(nowDate,rightYear,12,true);
viewDate(nextDate,rightYear+1,rightMonth);
}
else{
viewDate(nowDate,rightYear,rightMonth-1,true);
viewDate(nextDate,rightYear,rightMonth);
}
showBtn();
};
}
function nowDay(){
var tLi = newDate.getElementsByTagName("li");
var tDate = new Date();
for(var i=0;i<tLi.length;i++){
tLi[i].onmouseover = function(){
if(this.innerHTML != ""){
this.style.color = "#000";
this.style.background = "#e6dcda";
}
}
tLi[i].onmouseout = function(){
if(this.innerHTML != ""){
this.style.color = "#999";
this.style.background = "#f5f5f5";
}
}
tLi[i].onclick = function(){
var tEm = this.parentNode.parentNode.getElementsByTagName("em");
var tMonth = parseInt(tEm[2].innerHTML);
var tYear = parseInt(tEm[1].innerHTML);
if(this.innerHTML!=""){
lightBoxShow(tYear+"-"+tMonth+"-"+this.innerHTML+" Message","None");
//alert(tYear+"-"+tMonth+"-"+this.innerHTML);
}
}
}
for(var j=tLi.length/2;j<tLi.length;j++){
if(tLi[j].innerHTML == tDate.getDate()){
tLi[j].style.color = "#000";
tLi[j].style.background = "#e6dcda";
}
}
}
nowDay();
}
</script>
</head>
<body>
<div id="newDate">
<div id="nextDate"></div>
<div id="nowDate"></div>
</div>
<div id="overlay"></div>
<div id="win">
<div id="otitle">
<div id="close">×</div>
<div id="otitlestr"></div>
</div>
<div id="showstr"></div>
</div>
</body>
</html>效果：
以上就是使用原生JS实现相邻月份日历，小编相信有部分知识点可能是我们日常工作会见到或用到的。希望你能通过这篇文章学到更多知识。更多详情敬请关注亿速云行业资讯频道。
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