1.HTML完整代码如下：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
<link rel="stylesheet" href="style.css" />
<style>
.datepicker{
border: 1px solid #ccc;
border-radius: 4px;
padding: 5px;
height: 24px;
line-height: 24px;
width: 230px;
margin: 50px auto;
display: block;
}
.datepicker:focus{
outline: 0 none;
border: 1px solid #1abc9c;
}
</style>
</head>
<body>
<input type="text" class="datepicker" />
<script src="data.js"></script>
<script src="main.js"></script>
<script>
datepicker.init('.datepicker');
</script>
</body>
</html>
2.css样式如下：
.ui-datepicker-wrapper{
width: 240px;
font-size: 16px;
color: #666;
box-shadow: 2px 2px 8px 2px rgba(128, 128, 128, 0.3);
display: none;
position: absolute;
}
.ui-datepicker-wrapper-show{
display: block;
}
.ui-datepicker-wrapper .ui-datepicker-header{
padding: 0 20px;
height: 50px;
line-height: 50px;
text-align: center;
background: #f0f0f0;
border-bottom: 1px solid #ccc;
font-weight: bold;
}
.ui-datepicker-wrapper .ui-datepicker-btn{
font-family: serif;
font-size: 20px;
width: 20px;
height: 50px;
line-height: 50px;
color: #1abc9c;
text-align: center;
cursor: pointer;
text-decoration: none;
}
.ui-datepicker-wrapper .ui-datepicker-prev-btn{
float: left;
}
.ui-datepicker-wrapper .ui-datepicker-next-btn{
float: right;
}
.ui-datepicker-wrapper .ui-datepicker-body table{
width: 100%;
border-collapse: collapse;
}
.ui-datepicker-wrapper .ui-datepicker-body th,
.ui-datepicker-wrapper .ui-datepicker-body td{
text-align: center;
height: 30px;
}
.ui-datepicker-wrapper .ui-datepicker-body th{
font-size: 12px;
height: 40px;
line-height: 40px;
}
.ui-datepicker-wrapper .ui-datepicker-body td{
font-size: 10px;
border: 1px solid #f0f0f0;
cursor: pointer;
}
.ui-datepicker-wrapper .ui-datepicker-body td.not{
color: #c0bbbb;
font-weight: normal;
}
.ui-datepicker-wrapper .ui-datepicker-body td.active{
background-color: #1abc9c;
font-weight: normal;
color: #fff;
}
3.js代码如下：
data.js如下：
(function(){
var datepicker = {};
datepicker.getMonthData = function(year, month){
var ret = [];
// month 为真实的数据
if(!year || !month){
// if(!year && !month){
var today = new Date();
year = today.getFullYear();
month = today.getMonth() + 1;
}
// 当月第一天
var firstDay = new Date(year, month-1, 1);
// 当月第一天的星期几
var firstDayWeekDay = firstDay.getDay();
// 周日处理
if(firstDayWeekDay === 0){
firstDayWeekDay = 7;
}
year = firstDay.getFullYear();
month = firstDay.getMonth() + 1;
// if(month < 10){
// month = "0" + month;
// }
//上个月的最后一天 (当月的第0天)
var lastDayOfLastMonth = new Date(year, month-1, 0);
//上个月的最后一天的日期
var lastDateOfLastMonth = lastDayOfLastMonth.getDate();
//当月第一天前面显示多少上月的数据
var preMonthDayCount = firstDayWeekDay - 1;
//当月的最后一天
var lastDay = new Date(year, month, 0);
//当月的最后一天的日期
var lastDate = lastDay.getDate();
for(var i = 0; i < 7*6; i++){
//当月对应的日期
var date = i + 1 - preMonthDayCount;
var showDate = date; //显示的是哪一天
var thisMonth = month; //当月
if(date <= 0){
//上一月
thisMonth = month - 1;
showDate = lastDateOfLastMonth + date;
}
else if(date > lastDate){
//下一月
thisMonth = month + 1;
showDate = showDate - lastDate;
}
if(thisMonth === 0){
thisMonth = 12;
}
if(thisMonth === 13){
thisMonth = 1;
}
ret.push({
year: year,
month: thisMonth,
date: date,
showDate: showDate
})
}
return {
year: year,
month: month,
days: ret,
lastDate: lastDate
};
}
window.datepicker = datepicker;
})();
main.js如下:
(function(){
var datepicker = window.datepicker;
var monthData;
var $wrapper;
//querySelector() 方法返回文档中匹配指定 CSS 选择器的一个元素。
datepicker.buildUi = function(year, month){
monthData = datepicker.getMonthData(year,month);
var html = '<div class="ui-datepicker-header">'+
'<a href="#" class="ui-datepicker-btn ui-datepicker-prev-btn"><</a>'+
'<a href="#" class="ui-datepicker-btn ui-datepicker-next-btn">></a>'+
'<span class="ui-datepicker-curr-month">'+monthData.year+'-'+padding(monthData.month)+'</span>'+
'</div>'+
'<div class="ui-datepicker-body">'+
'<table>'+
'<thead>'+
'<tr>'+
'<th>一</th>'+
'<th>二</th>'+
'<th>三</th>'+
'<th>四</th>'+
'<th>五</th>'+
'<th>六</th>'+
'<th>日</th>'+
'</tr>'+
'</thead>'+
'<tbody>';
for(var i = 0; i < monthData.days.length; i++ ){
var date = monthData.days[i];
if(i%7 === 0){
html += "<tr>";
}
// html += '<td data-date="'+date.date+'">'+date.showDate+'</td>';
if(date.date <= 0 || date.date > monthData.lastDate){
html +='<td class="not" data-date="'+ date.date +'">'+date.showDate+'</td>';
}
else if(date.year === (new Date()).getFullYear() && date.month === ((new Date()).getMonth()+1) && date.date === (new Date()).getDate()){
html +='<td class="active" data-date="'+ date.date +'">'+date.showDate+'</td>';
}
else{
html +='<td data-date="'+ date.date +'">'+date.showDate+'</td>';
}
if(i%7 === 6){
html += "</tr>";
}
};
html += '</tbody>'+
'</table>'+
'</div>';
return html;
};
datepicker.render = function(direction){
var year,month;
if(monthData){
year = monthData.year;
month = monthData.month;
}
if(direction === 'prev'){
month--;
if(month === 0){
month = 12;
year--;
}
}
if(direction === 'next'){
month++;
}
// var html = datepicker.buildUi(year, month);
// $wrapper = document.createElement("div");
// $wrapper.className = 'ui-datepicker-wrapper';
// $wrapper.innerHTML = html;
// document.body.appendChild($wrapper);
var html = datepicker.buildUi(year, month);
$wrapper = document.querySelector('.ui-datepicker-wrapper');
if(!$wrapper){
$wrapper = document.createElement("div");
document.body.appendChild($wrapper);
$wrapper.className = 'ui-datepicker-wrapper';
}
$wrapper.innerHTML = html;
}
datepicker.init = function(input){
datepicker.render();
var $input = document.querySelector(input);
var isOpen = false;
$input.value = format(new Date());
$input.addEventListener('click',function(){
if(isOpen){
$wrapper.classList.remove('ui-datepicker-wrapper-show')
isOpen = false;
}else{
$wrapper.classList.add('ui-datepicker-wrapper-show')
var left = $input.offsetLeft;
var top = $input.offsetTop;
var height = $input.offsetHeight;
$wrapper.style.top = top + height + 2 + "px";
$wrapper.style.left = left + "px";
isOpen = true;
}
},false);
$wrapper.addEventListener('click',function(e){
var $target = e.target;
if(!$target.classList.contains('ui-datepicker-btn')){
return;
}
// 上一月
if($target.classList.contains('ui-datepicker-prev-btn')){
datepicker.render('prev');
}
// 下一月
else if($target.classList.contains('ui-datepicker-next-btn')){
datepicker.render('next');
}
}, false);
$wrapper.addEventListener('click',function(e){
var $target = e.target;
if($target.tagName.toLowerCase() !== 'td'){
return;
}
var date = new Date(monthData.year, monthData.month - 1, $target.dataset.date);
$input.value = format(date);
$wrapper.classList.remove('ui-datepicker-wrapper-show')
isOpen = false;
}, false);
}
var padding = function(num){
if(num <= 9){
return "0"+num;
}
return num;
}
function format(date){
var ret = '';
ret += date.getFullYear() + "-";
ret += padding(date.getMonth() + 1) + "-";
ret += padding(date.getDate());
return ret;
}
})();
4.最终完成效果如下：
