vue周日历 点击某一天，某一天背景变红

周日历更新

vue部分

  <template>
   <div class="date">
     <!-- 年份 月份 -->
     <div class="month">
      <p><van-button class="vanbutton" icon="arrow-left" @click="pickPre(currentYear,currentMonth)" />{{ currentYear }}年{{ currentMonth }}月<van-button class="vanbutton" icon="arrow" @click="pickNext(currentYear,currentMonth)"/></p>

     </div>
     <!-- 星期 -->
     <ul class="weekdays">
     <li>一</li>
     <li>二</li>
     <li>三</li>
     <li>四</li>
     <li>五</li>
     <li>六</li>
     <li>日</li>
    </ul>
    <!-- 日期 -->
    <!-- 左滑、右滑 -->

  <v-touch
    @swipeleft = "swipeLeft"
    @swiperight = "swipeRight"
    :swipe-options="{direction: 'horizontal'}"
  >

    <ul class="days">
     <li @click="pick(day)" v-for="(day, index) in days" :key="index">
      <!--本月-->
      <span v-if="day.getMonth()+1 != currentMonth" class="other-month">{{ day.getDate() }}</span>
      <span v-else>
      <!--被点击的-->
      <span v-if="day.getDate() == selectedday" class="active">{{ day.getDate() }}</span>
      <!--今天-->
      <!-- <span v-if="day.getFullYear() == new Date().getFullYear() && day.getMonth() == new Date().getMonth() && day.getDate() == new Date().getDate()" class="active">{{ day.getDate() }}</span> -->
      <span v-else>{{ day.getDate() }}</span>
      </span>
     </li>
    </ul>
     </v-touch>
  </div>
 </template>

js部分

<script>
export default {

  name: 'date',

  data () {
    return {
      currentYear: 1970,
      currentMonth: 1,
      currentDay: 1,
      currentWeek: 1,
      days: [],
      dataDay: [],
      selectedday: ''
    }
  },

  mounted () {

  },

  created () {
    this.initData(null)
  },

  methods: {
    formatDate (year, month, day) {
      const y = year
      let m = month
      if (m < 10) m = `0${m}`
      let d = day
      if (d < 10) d = `0${d}`
      return `${y}-${m}-${d}`
    },

    initData (cur) {
      let date = ''
      if (cur) {
        date = new Date(cur)
      } else {
        date = new Date()
      }
      this.currentDay = date.getDate()
      this.currentYear = date.getFullYear()
      this.currentMonth = date.getMonth() + 1
      this.currentWeek = date.getDay()
      if (this.currentWeek === 0) {
        this.currentWeek = 7
      }
      const str = this.formatDate(this.currentYear, this.currentMonth, this.currentDay)
      this.days.length = 0
      this.dataDay.length = 0
      for (let i = this.currentWeek - 1; i >= 0; i -= 1) {
        const d = new Date(str)
        d.setDate(d.getDate() - i)
        this.days.push(d)
        this.dataDay.push(this.formatDate(d.getFullYear(), d.getMonth() + 1, d.getDate()))
      }
      for (let i = 1; i <= 7 - this.currentWeek; i += 1) {
        const d = new Date(str)
        d.setDate(d.getDate() + i)
        this.days.push(d)
        this.dataDay.push(this.formatDate(d.getFullYear(), d.getMonth() + 1, d.getDate()))
      }
      this.emitToParent()
    },

    weekPre () {
      const d = this.days[0]
      d.setDate(d.getDate() - 7)
      this.initData(d)
    },

    weekNext () {
      const d = this.days[6]
      d.setDate(d.getDate() + 7)
      this.initData(d)
    },

    pickPre (year, month) {
      const d = new Date(this.formatDate(year, month, 1))
      d.setDate(0)
      this.initData(this.formatDate(d.getFullYear(), d.getMonth() + 1, 1))
    },

    pickNext (year, month) {
      const d = new Date(this.formatDate(year, month, 1))
      d.setDate(35)
      this.initData(this.formatDate(d.getFullYear(), d.getMonth() + 1, 1))
    },

    pick (date) {
      this.selectedday = date.getDate()
      this.emitToParent2(this.formatDate(date.getFullYear(), date.getMonth() + 1, date.getDate()))
    },
    emitToParent () {
      this.$emit('child-event', this.dataDay)
    },
    emitToParent2 (date) {
      this.$emit('child-event-one', date)
    },
    swipeLeft () {
      this.weekNext()
    },
    swipeRight () {
      this.weekPre()
    }

  }
}
</script>

  style部分

<style lang="scss">

  .date {
   height: 120px;
   color: #333;
   background-color: #fff;
   .vanbutton {
     border-color: #fff;
     top: 5px;
   }

   .month {
    font-size: 12px;
    text-align: center;
    margin-top: 10px;
   }

   .weekdays {
    display: flex;
    font-size: 14px;
    margin-top: 10px;

    li {
     flex: 1;
     text-align: center;
     color: #aaa;
    }
   }

   .days {
    display: flex;

    li {
     flex: 1;
     font-size: 15px;
     text-align: center;
     margin-top: 5px;
     line-height: 30px;
     width: 30px;
     height: 30px;

     .active {
      display: inline-block;
      width: 30px;
      height: 30px;
      color: #fff;
      border-radius: 50%;
      background-color: #fa6854;
     }
     .haslocus {
      display: inline-block;
      width: 30px;
      height: 4px;
      color: #fff;
      border-radius: 50%;
      background-color: #fa6854;
      margin-bottom: 0px;
     }

     .other-month {
      color: #e4393c;
     }
    }
   }
  }
 </style>

待添加功能 ：根据数据有数据的做标记