vue实现简单的日历效果

<div id="dateContainer">
 <div class="date__showNowTime">
 今天是 <span v-text="ynow"></span>年<span v-text="mnow+1"></span>月<span v-text="dnow"></span>日
 </div>
 <div class="nowTime">
 <button class="preMon" @click="preMon">上个月</button>
 <div class="thisMon">
 <span v-text="ynow"></span>/
 <span v-text="mnow+1"></span>
 </div>
 <button class="nextMon" @click="nextMon">下个月</button>
 </div>
 <table border="1" id="table">
 
 </table>
 
</div>

export default {
 data() {
 return {
 newDate: '',//当前的日期的信息
 ynow: '',//当前的年数
 mnow: '',//当前的月份
 dnow: '',//当前的天数
 firstDay: '',//第一天
 firstnow: '',//当前的星期
 m_days: [],//每个月的天数
 tr_str: '',//行数
 }
 },
 methods: {
 getDaysInfo() {
 var _this = this;
 this.sureDate(_this);
 },
 is_leap(year) {//判断是不是闰年
 return (year%100==0?(year%400==0?1:0):(year%4==0?1:0));
 },
 //下面的是画表格的方法，这个方法会根据数据画出我们需要的表格
 drawTable(jsonHtml) {
 var _this = this;
 var str = `
 <tr class="xiqi">
 <td class="isRed">星期日</td>
 <td>星期一</td>
 <td>星期二</td>
 <td>星期三</td>
 <td>星期四</td>
 <td>星期五</td>
 <td class="isRed">星期六</td>
 </tr>`;
 var idx = '',date_str = '',isRed = '',hasMsg='';
 for(var i = 0; i< _this.tr_str; i++) {
 str+='<tr>';
 for(var k = 0; k < 7; k++) {
 
 idx = i*7+k;
 isRed = (k===0||k===6)?"isRed":"";
 date_str=idx-_this.firstnow+1;
 (date_str<=0 || date_str>this.m_days[this.mnow]) ? date_str=" " : date_str=idx-_this.firstnow+1;
 date_str==_this.dnow?hasMsg='<td class="thisDay" date="'+date_str +'"><span class="'+isRed +'">'+date_str+'</span></td>':hasMsg='<td date="'+date_str +'"><span class="'+isRed +'">'+date_str+'</span></td>';
 
 for(var l = 0, len = jsonHtml.length; l < len; l++) {
 if(date_str== jsonHtml[l].date) {
 var newStr = '<p>'+jsonHtml[l].msg +'</p>';
 date_str==_this.dnow?hasMsg='<td class="thisDay" date="'+date_str +'"><span class="'+isRed +'">'+date_str+'</span>'+ newStr+'</td>':hasMsg='<td date="'+date_str +'"><span class="'+isRed +'">'+date_str+'</span>'+ newStr+'</td>';
 
 }
 }
 str+=hasMsg;
 }
 str+='</tr>';
 }
 var table = document.getElementById('table');
 table.innerHTML = str;
 },
 //两个参数代表的含义分别是this对象以及判断当前的操作是不是在进行月份的修改
 sureDate(_this,other) {
 this.newDate = new Date();
 this.ynow = this.newDate.getFullYear();
 if(!other) {
 this.mnow=this.newDate.getMonth(); //月份
 }
 this.dnow=this.newDate.getDate(); //今日日期
 this.firstDay = new Date(this.ynow,this.mnow,1);
 this.firstnow=this.firstDay.getDay();
 this.m_days = [31,28+this.is_leap(this.ynow),31,30,31,30,31,31,30,31,30,31];
 this.tr_str = Math.ceil((_this.m_days[this.mnow] + this.firstnow)/7);
 this.showMsg();
 },
 preMon() {
 var _this = this;
 this.mnow--;
 this.sureDate(_this,"up");
 },
 nextMon() {
 var _this = this;
 this.mnow++;
 this.sureDate(_this,"next");
 },
 //通过接口返回的是我们当前的月份对应在日历中需要处理的事项
 showMsg() {
 var jsonHtml = [{
 date: 2,
 msg: '吃饭'
 },
 {
 date: 3,
 msg: '睡觉'
 },
 {
 date: 4,
 msg: '打豆豆'
 },
 {
 date: 6,
 msg: '豆豆不在家'
 },
 {
 date: 12,
 msg: '~~~~~'
 },
 {
 date: 15,
 msg: '怎么办~~~~'
 },
 {
 date: 20,
 msg: '找豆豆'
 }];
 this.drawTable(jsonHtml)
 }
 
 },
 mounted() {
 //画出当前的月份的天数对应的表格
 this.getDaysInfo();
 //进行数据的获取，显示到对应的位置
 }