moment 获取当前月日历

获取当前月日历

<template>
    <div id="calendar">
        <div class="top">{{date}}</div>
        <ul>
            <li><b>日</b></li>
            <li>一</li>
            <li>二</li>
            <li>三</li>
            <li>四</li>
            <li>五</li>
            <li><b>六</b></li>
        </ul>
        <ul v-for="item in arr" :key="item.id">
            <li><span :class="item[0].day == date.substring(8) && item[0].month == '当月'? 'choose' :''" :style="!Object.is(item[0].month,'当月') ? 'color:#cecece;' : ''">{{item[0].day}}</span>&nbsp;</li>
            <li><span :class="item[1].day == date.substring(8) && item[1].month == '当月'? 'choose' :''" :style="!Object.is(item[1].month,'当月') ? 'color:#cecece;' : ''">{{item[1].day}}</span>&nbsp;</li>
            <li><span :class="item[2].day == date.substring(8) && item[2].month == '当月'? 'choose' :''" :style="!Object.is(item[2].month,'当月') ? 'color:#cecece;' : ''">{{item[2].day}}</span>&nbsp;</li>
            <li><span :class="item[3].day == date.substring(8) && item[3].month == '当月'? 'choose' :''" :style="!Object.is(item[3].month,'当月') ? 'color:#cecece;' : ''">{{item[3].day}}</span>&nbsp;</li>
            <li><span :class="item[4].day == date.substring(8) && item[4].month == '当月'? 'choose' :''" :style="!Object.is(item[4].month,'当月') ? 'color:#cecece;' : ''">{{item[4].day}}</span>&nbsp;</li>
            <li><span :class="item[5].day == date.substring(8) && item[5].month == '当月'? 'choose' :''" :style="!Object.is(item[5].month,'当月') ? 'color:#cecece;' : ''">{{item[5].day}}</span>&nbsp;</li>
            <li><span :class="item[6].day == date.substring(8) && item[6].month == '当月' ? 'choose' :''" :style="!Object.is(item[6].month,'当月') ? 'color:#cecece;' : ''">{{item[6].day}}</span>&nbsp;</li>
        </ul>
    </div>
</template>
<script>
import moment from 'moment'
export default {
    data () {
        return {
            currentMonthDays:'',
           currentWeekday:'',
           lastMonthDays:'',
           date:moment().format('YYYY-MM-DD'),
           arr:[],
        }
    },
    methods: {
      getData(){
      this.currentWeekday = moment(this.date).date(1).weekday(); // 获取当月1号为星期几
      this.lastMonthDays = moment(this.date).subtract(1, 'month').daysInMonth(); // 获取上月天数
      this.currentMonthDays = moment(this.date).daysInMonth(); // 获取当月天数
      //一个月总天数是31，1号是周五或者周六 => 6个[]
      //一个月总天数是30，1号是周六 => 6个[]
　　　　var daysArr = []
      if((this.currentMonthDays == '31' && this.currentWeekday == '5' || this.currentWeekday == '6' ) || (this.currentMonthDays == '30' && this.currentWeekday == '6')){
          daysArr = [[], [], [], [], [], []];
        }else{
          daysArr = [[], [], [], [], []];
        }
        //当day小于等于上月天数取day，
        //当day小于等于上月天数 + 当月天数则取 day-上月天数
        //当day大于上月天数 + 当月天数则取 day - （上月天数 + 当月天数）
        //展示上个月这个月下个月的日历
      const getDay = day => (day <= this.lastMonthDays ? day : (day <= (this.lastMonthDays + this.currentMonthDays)) ? day - this.lastMonthDays : day - (this.lastMonthDays + this.currentMonthDays)); // 日期处理  
        //只展示这个月的日历
    //   const getDay = day => (day <= this.lastMonthDays ? '' : (day <= (this.lastMonthDays + this.currentMonthDays)) ? day - this.lastMonthDays : ''); // 日期处理
        //当mon小于等于上月天数该日期属于上个月，
        //当day小于等于上月天数 + 当月天数则该日期属于这个月
        //当day大于上月天数 + 当月天数则该日期属于下个月
      const getMonth = mon => (mon <= this.lastMonthDays ? '上月' : mon <= (this.lastMonthDays + this.currentMonthDays) ? '当月' : '下月')    
    
      
      for (let i = 0; i < 7; i += 1) {
        let virtualDay = (this.lastMonthDays - this.currentWeekday) + i + 1; 
        for (let j = 0; j < daysArr.length; j += 1) {
          daysArr[j][i] = {'day':getDay(virtualDay + (j * 7)),'month':getMonth(virtualDay + (j * 7))};
        }
      }
        console.table(daysArr);
        this.arr = daysArr

      }
    },
    mounted () {
      this.getData()
    }
    
}
</script>
<style scoped >
*{margin:0;padding:0;  list-style:none }
.choose{
  width: 30px;
  height: 30px;
  line-height: 30px;
  text-align: center;
  display: inline-block;
  background: #2196f3;
  color: #fff !important;
  border-radius: 50%;
}
#calendar {
    width: 400px;
    font-size: 12px;
    margin: 50px auto;
    border-bottom: 1px solid #2196f3;
}

#calendar .top {
    height: 40px;
    line-height: 40px;
    background: #2196f3;
    border: 1px solid #2196f3;
    color: #fff;
    padding: 0 10px;
    clear: both;
}
#calendar ul {
    margin: 0;
    padding: 0;
    height:50px;
    color: #888;
    font-size: 14px;
    border-left: 1px solid #2196f3;
    border-right: 1px solid #2196f3;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

#calendar ul li {
  width: 48px;
}
#calendar ul li span {
  color: black;
  font-weight: bold;
}
#calendar ul li b {
    font-weight: normal;
    color: #0781e2;
}
</style>

 这个是只取当前月份：使用这个  =>  const getDay = day => (day <= this.lastMonthDays ? '' : (day <= (this.lastMonthDays + this.currentMonthDays)) ? day - this.lastMonthDays : ''); // 日期处理

在当月日历展示下个月的日期使用如下方法
const getDay = day => (day <= this.lastMonthDays ? day : (day <= (this.lastMonthDays + this.currentMonthDays)) ? day - this.lastMonthDays : day - (this.lastMonthDays + this.currentMonthDays)); // 日期处理