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
  }