效果图：
效果如图所示，尽管看上去并不是很美观，但是，基本上的功能还是已经完成了，码了一天多的时间，权当做复习一下js吧。
整个做下来差不多码了500多行代码~其实只是很多的样式也包括了在其中了，虽然代码有点多，但是很多地方还是可以优化的。
作为新手，优化什么的先滚一边了，现在主要的是自己要懂对吧~如果感觉能对你有所帮助，不嫌弃的话就看看吧。
思路：
①找好一张样式图片；
②分析样式布局……
③涉及到的相关事件：click（单击事件）、mouseover（鼠标覆盖）、mouseout（鼠标离开）……
④闭包：作为一个插件，需要避免和其他插件产生冲突，如变量、方法啥啥啥的，所以就需要使用到闭包，就先阶段我对闭包的理解，其实是很简单的，如果不清楚的话，看百度，上面有很多各种各样的写法……
⑤码代码……
HTML
很简单，一个输入框、入口js还有就是写的js插件……
<!DOCTYPE html> <html> <head> <title>原生的日历插件</title> </head> <body> <input type="text" name="time" id="container" class="calender-plugin"> <script type="text/javascript" src="./calender.js"></script> //需要注意引用顺序 <script type="text/javascript" src="./main.js"></script> //这个就是所谓的“入口”函数，我取的名 </body> </html>
main.js
就是对js插件的调用，一句代码……
window.onload = function(){
CalenderPlugin('container',{
298,
height:192
});
}
CalenderPlugin：插件的方法名称
container：input输入框的id
{
298,
height:192
}：自定义的相关参数（有好几个，这里我只定义了两个，它能够覆盖默认的相关参数）
calender.js插件
因为全部都是采用js来完成的，代码有点多，如果需要可以直接复制粘贴到自己编辑器中。
;(function(window,document){
var date = new Date();
//默认参数
var params = {
300,
height:400,
borderRadius:3,
backgroundColor:'#B4B4B2',
weekendTitleBg:'#989896',//星期的背景颜色
year:date.getFullYear(),
month:date.getMonth()+1,
day:date.getDate(),
scope:'1946-2118',//年 查询范围
}
var CalenderPlugin = function(element_id,options){
//判断当前对象是否已经创建 instanceof：判断对象类型
//如果当前对象为空，则不能调用其自身所定义的标准相关属性
if(!(this instanceof CalenderPlugin))
return new CalenderPlugin(element_id,options);
if (element_id==null || element_id==undefined || element_id=='') {
console.error("You haven't binding Element to showing Calender ！！！！！！");
return;
}
this.params = this.extend(params,options);
this.init(element_id,this.params)
}
//为这个函数规定自己的标准
CalenderPlugin.prototype = {
//调用入口
init:function(element_id,options){
this.bind(element_id, options,this);
},
//扩展函数 用来规定用户指定参数 - 默认参数之间的扩展
//当用户有规定相关的参数，则以用户为主，否则以默认参数为主
extend:function(opt1,opt2){
if (opt2!=undefined || opt2!=null) {
if(typeof(opt2)!="object")
return console.error("This "+typeof(opt2)+" is Belong object");
}
for(var i in opt2){
for(var j in opt1){
//相同属性，则覆盖
if (i === j) {
opt1[j] = opt2[i];
}
// 不同属性，则添加
else{
opt1[i] = opt2[i];
}
}
}
return opt1;
},
//创建日历样式
create:function(element_id,e,opt,cp){
//日历容器
var share = document.createElement('div');
share.style.position = 'absolute';
share.id = 'calender-container-share';
share.style.width = '100vw';
share.style.height = '100vh';
share.style.top = 0;
share.style.left = 0;
share.style.zIndex = '998';
var div = document.createElement('div');
if (e.target.id === element_id) {
div.className = 'calender-container-class-name'
div.id = 'calender-container-id';
div.style.position = 'absolute';
div.style.width = opt.width +'px';
div.style.height = opt.height +'px';
//div.style.border = '1px solid ';
div.style.top = e.clientY + 4 + 'px';
div.style.left = e.clientX + 'px';
div.style.zIndex = '999';
div.style.display = 'block';
div.style.borderRadius = opt.borderRadius + 'px';
div.style.background = opt.backgroundColor;
div.style.opacity = '0.8';
share.appendChild(div);
document.getElementsByTagName("body")[0].appendChild(share);
}
//生成日历单元格
//表单
var form = document.createElement('form');
form.style.width = 100+"%";
form.style.height = 100+"%";
//头部的选择项
var header = document.createElement('div');
header.style.width = 100+"%";
header.style.height = opt.height/8+"px";
header.style.lineHeight = '1.5'
// 年选择
var year_select_container = document.createElement('div');
year_select_container.style.display = 'inline-block';
year_select_container.style.height = '100%';
year_select_container.style.width = '40%';
//左箭头
var year_left_btn = document.createElement('div');
year_left_btn.id = 'calender-year-left-btn';
year_left_btn.style.width = '8px';
year_left_btn.style.height = '8px';
year_left_btn.style.display = 'inline-block';
year_left_btn.style.border = '2px solid white';
year_left_btn.style.borderTop = 'none';
year_left_btn.style.borderRight = 'none';
year_left_btn.style.transform = 'rotate(45deg)';
year_left_btn.style.position = 'relative';
year_left_btn.style.cursor = 'pointer';
year_left_btn.style.marginLeft = '10%';
year_select_container.appendChild(year_left_btn);
//年
var year_label = document.createElement('div');
year_label.id = 'calender-year-label';
year_label.innerText = opt.year+'年';
year_label.style.color = 'white';
year_label.style.display = 'inline-block';
year_label.style.padding = '0 7%';
year_label.style.cursor = 'pointer';
year_select_container.appendChild(year_label);
//右箭头
var year_right_btn = document.createElement('div');
year_right_btn.id = 'calender-year-right-btn';
year_right_btn.style.width = '8px';
year_right_btn.style.height = '8px';
year_right_btn.style.display = 'inline-block';
year_right_btn.style.border = '2px solid white';
year_right_btn.style.borderTop = 'none';
year_right_btn.style.borderRight = 'none';
year_right_btn.style.transform = 'rotate(-135deg)';
year_right_btn.style.cursor = 'pointer';
year_select_container.appendChild(year_right_btn);
header.appendChild(year_select_container);
//月
var month_select_container = document.createElement('div');
month_select_container.style.display = 'inline-block';
month_select_container.style.height = '100%';
month_select_container.style.width = '28%';
month_select_container.style.float = 'right';
//左箭头
var month_left_btn = document.createElement('div');
month_left_btn.id = 'calender-month-left-btn-id';
month_left_btn.style.width = '8px';
month_left_btn.style.height = '8px';
month_left_btn.style.display = 'inline-block';
month_left_btn.style.border = '2px solid white';
month_left_btn.style.borderTop = 'none';
month_left_btn.style.borderRight = 'none';
month_left_btn.style.transform = 'rotate(45deg)';
month_left_btn.style.position = 'relative';
month_left_btn.style.marginLeft = '10%';
month_left_btn.style.cursor = 'pointer';
month_select_container.appendChild(month_left_btn);
//月标签
var month_label = document.createElement('div');
month_label.innerText = opt.month+'月';
month_label.id = 'calender-month-label-id';
month_label.style.color = 'white';
month_label.style.display = 'inline-block';
month_label.style.padding = '0 7%';
month_label.style.cursor = 'pointer';
month_select_container.appendChild(month_label);
//右箭头
var month_right_btn = document.createElement('div');
month_right_btn.id = 'calender-month-right-btn-id';
month_right_btn.style.width = '8px';
month_right_btn.style.height = '8px';
month_right_btn.style.display = 'inline-block';
month_right_btn.style.border = '2px solid white';
month_right_btn.style.borderTop = 'none';
month_right_btn.style.borderRight = 'none';
month_right_btn.style.transform = 'rotate(-135deg)';
month_right_btn.style.cursor = 'pointer';
month_select_container.appendChild(month_right_btn);
header.appendChild(month_select_container);
form.appendChild(header);
//星期标题
var weekendTitle = document.createElement('div');
weekendTitle.style.width = 100+"%";
weekendTitle.style.height = opt.height/9+"px";
weekendTitle.style.background = opt.weekendTitleBg;
var weekends = ['日','一','二','三','四','五','六'];
var w_table = document.createElement('table');
w_table.style.width = 100+"%";
w_table.style.height = 100+"%";
w_table.style.color = "white";
w_table.style.textAlign = 'center';
w_table.style.fontSize = '7px';
var w_row = document.createElement('tr');
for(var i in weekends){
var w_column = document.createElement('td');
w_column.innerText = weekends[i];
w_row.appendChild(w_column);
}
w_table.appendChild(w_row);
weekendTitle.appendChild(w_table);
form.appendChild(weekendTitle);
//日期表格
var table = document.createElement('table');
table.style.width = 100+"%";
table.id = 'calender-days-table';
table.style.height = opt.height
- (header.style.height.substring(0, header.style.height.indexOf('p')))
- (weekendTitle.style.height.substring(0, weekendTitle.style.height.indexOf('p')))
+"px";
table.style.textAlign = 'center';
table.style.fontSize = '7px';
table.style.color = 'white';
form.appendChild(table);
div.appendChild(form);
this.bind(element_id, opt,cp);
},
//事件绑定
//change（）和getDate（）本来也属于事件绑定
//但是由于，有些方法需要进行重复的调用，所以避免引起事件的循环调用，所以分开写
bind:function(element_id,opt,cp){
document.addEventListener("click", function(e){
//判断是否已经存在日历容器，则先清除，再创建 排除自身
if (document.getElementsByClassName('calender-container-class-name').length >0
&& e.target.id === 'calender-container-share') {
var el = document.getElementById('calender-container-share');
document.getElementById('calender-container-share')
.parentNode.removeChild(el);
}
if(document.getElementsByClassName('calender-container-class-name').length >0){
return;
}
if(e.target.id !== element_id){
return;
}
cp.create(element_id,e,opt,cp);
cp.build(element_id,opt,cp);
cp.change(element_id,opt,cp);
}, false);
},
// 当年、月发生改变时触发
change:function(element_id,opt,cp){
// 减少一个月
if(document.getElementById('calender-month-left-btn-id') != null)
document.getElementById('calender-month-left-btn-id')
.addEventListener('click', function(e){
if(opt.month>1 && opt.month <=12)
opt.month = opt.month - 1;
cp.build(element_id,opt,cp);
}, false);
// 加一个月
if(document.getElementById('calender-month-right-btn-id') != null)
document.getElementById('calender-month-right-btn-id')
.addEventListener('click', function(e){
if(opt.month>=1 && opt.month <12)
opt.month = opt.month + 1;
cp.build(element_id,opt,cp);
}, false);
// 减一年
if(document.getElementById('calender-year-left-btn') != null)
document.getElementById('calender-year-left-btn')
.addEventListener('click', function(e){
opt.year = opt.year - 1;
cp.build(element_id,opt,cp);
}, false);
// 加一年
if(document.getElementById('calender-year-right-btn') != null)
document.getElementById('calender-year-right-btn')
.addEventListener('click', function(e){
opt.year = opt.year + 1;
cp.build(element_id,opt,cp);
}, false);
//选择年
if(document.getElementById('calender-year-label') != null)
document.getElementById('calender-year-label')
.addEventListener('click', function(e){
var year_list = document.createElement('div');
year_list.id = 'year-list-id';
year_list.style.width = opt.width/5 +'px';
year_list.style.height = opt.height/2 +'px';
year_list.style.zIndex = '999';
year_list.style.position = 'fixed';
year_list.style.top = e.y + 'px';
year_list.style.left = e.x + 'px';
year_list.style.background = 'white';
year_list.style.border = '1px solid white';
year_list.style.opacity = '0.8';
year_list.style.overflow = 'scroll';
year_list.style.overflowX = 'hidden';
var ul = document.createElement('ul');
ul.style.listStyleType = 'none';
ul.style.padding = '0';
var years = opt.scope.split('-');
for(var i=years[0];i<=years[1];i++){
var li = document.createElement('li');
li.innerText = i;
li.style.fontSize = '7px';
li.style.color = '#ff4747';
li.style.cursor = 'pointer';
ul.appendChild(li);
}
year_list.appendChild(ul);
if(document.getElementById('year-list-id')==null){
document.getElementById('calender-container-id').appendChild(year_list);
};
cp.getDate(element_id,opt);
}, false);
},
// 获取时间
getDate:function(element_id,opt){
_this = this;
//选择日期是的点击事件、hover
if(document.getElementById('calender-days-table') != null){
var trs = document.getElementById('calender-days-table').childNodes;
for(var i=0;i< trs.length;i++){
var tds = trs[i].childNodes;
for(var j=0;j<tds.length;j++){
trs[i].childNodes[j].addEventListener('click', function(e){
document.getElementById(element_id).value = e.target.className;
var el = document.getElementById('calender-container-share');
document.getElementById('calender-container-share')
.parentNode.removeChild(el);
}, false);
trs[i].childNodes[j].addEventListener('mouseover', function(e){
e.target.style.border = '1px solid white';
e.target.style.opacity = '0.5';
}, false);
trs[i].childNodes[j].addEventListener('mouseout', function(e){
e.target.style.border = 'none';
e.target.style.opacity = '';
}, false);
}
}
}
//下拉选择年份
if(document.getElementById('year-list-id') !=null){
var lis = document.getElementById('year-list-id').childNodes[0].childNodes;
lis.forEach(function(item,index){
item.addEventListener('click', function(e){
opt.year = new Number(e.target.innerText);
_this.build(element_id,opt,_this);
document.getElementById('year-list-id').parentNode.removeChild(document.getElementById('year-list-id'));
}, false);
item.addEventListener('mouseover', function(e){
e.target.style.background = 'rgb(195, 195, 193)';
e.target.style.color = 'white';
}, false);
item.addEventListener('mouseout', function(e){
e.target.style.background = '';
e.target.style.color = '#ff4747';
}, false);
})
}
},
//构建数据表格
build:function(element_id,opt,cp){
//年份显示
document.getElementById('calender-year-label').innerText = opt.year +'年';
// 月份显示
document.getElementById('calender-month-label-id').innerText = opt.month +'月';
// 日期表格
var table = document.getElementById('calender-days-table');
if (table!=null) {
var trs = table.childNodes;
while(trs.length>0){
table.removeChild(trs[0]);
}
var year,
month,
day,
days,
last_month_days,//上个月天数
next_month_days;//下个月天数
year = opt.year;
month = opt.month;
day = opt.day;
//生成一个时间对象
//为了获取到每年每月其中的一号是星期几
var date = new Date(year,month-1,1);
//日期行、列
switch(month){
case 1:
days = 31;
last_month_days = 31;
if (year%4 == 0 && year%100 != 0){
next_month_days = 29;
}
else{
next_month_days = 28;
}
break;
case 2:
last_month_days = 31;
next_month_days = 30;
if (year%4 == 0 && year%100 != 0){
days = 29;
}
else{
days = 28;
}
break;
case 3:
if (year%4 == 0 && year%100 != 0){
last_month_days = 29;
}
else{
last_month_days = 28;
}
days = 31;
next_month_days = 30;
break;
case 4:
days = 30;
last_month_days = 31;
next_month_days = 31;
break;
case 5:
days = 31;
last_month_days = 30;
next_month_days = 30;
break;
case 6:
days = 30;
last_month_days = 31;
next_month_days = 31;
break;
case 7:
days = 31;
last_month_days = 30;
next_month_days = 31;
break;
case 8:
days = 31;
last_month_days = 31;
next_month_days = 30;
break;
case 9:
days = 30;
last_month_days = 31;
next_month_days = 31;
break;
case 10:
days = 31;
last_month_days = 30;
next_month_days = 30;
break;
case 11:
days = 30;
last_month_days = 31;
next_month_days = 31;
break;
case 12:
days = 31;
last_month_days = 31;
next_month_days = 31;
break;
default:
return console.log("the month have "+ month+" ???");
}
var o = 1;
var l = last_month_days - date.getDay() + 1;//上个月开始时间
var n = 1;//下个月开始时间
for(var i=0;i<Math.ceil((days+date.getDay()+1)/7);i++){//计算表格多少行
var row = document.createElement('tr');
for(var j=0;j<7;j++){
var column = document.createElement('td');
column.style.cursor = 'pointer';
if (i==0 && o<= days) {//处理“每个月1号”这个特殊日期
if(j>=date.getDay()){
column.innerText = o;
column.className = year+"-"+month+"-"+o;
o++;
}
else{//上个月时间
column.innerText = l;
column.className = year+"-"+(month-1)+"-"+l;
l ++;
}
}
else{
if (o<=days) {
column.innerText = o;
column.className = year+"-"+month+"-"+o;
o ++;
}
else{//下一个月
column.innerText = n;
column.className = year+"-"+(month+1)+"-"+n;
n ++;
}
}
if (j==6 || j==0) {
column.style.color = '#ffb714';
}
row.appendChild(column);
}
table.appendChild(row);
}
}
this.getDate(element_id,opt);
}
};
window.CalenderPlugin = CalenderPlugin;
}(window,document));
~这个东西不清楚怎么折叠代码块，将就的看看吧~
好的，完啦~
只有不断学习才会进步，工资才会高，老板才能看你顺眼，你才能选择公司，选择老板！