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
 }