Vue を使用してカレンダー選択効果を実装する方法

npm install vue vue-router vuex

<template>
  <div class="calendar">
    <h2>{{ year }}年{{ month }}月</h2>
    <table>
      <thead>
        <tr>
          <th v-for="week in weeks" :key="week">{{ week }}</th>
        </tr>
      </thead>
      <tbody>
        <tr v-for="week in calendar" :key="week">
          <td v-for="day in week" :key="day" @click="selectDate(day)">{{ day }}</td>
        </tr>
      </tbody>
    </table>
  </div>
</template>

<script>
export default {
  data() {
    return {
      now: new Date(),
      year: 0,
      month: 0,
      weeks: ['日', '一', '二', '三', '四', '五', '六'],
      calendar: []
    };
  },
  mounted() {
    this.updateCalendar();
  },
  methods: {
    updateCalendar() {
      const firstDay = new Date(this.now.getFullYear(), this.now.getMonth(), 1);
      const lastDay = new Date(this.now.getFullYear(), this.now.getMonth() + 1, 0);
      this.year = this.now.getFullYear();
      this.month = this.now.getMonth() + 1;
      
      const gap = firstDay.getDay();
      const days = lastDay.getDate();
      let calendar = [];
      let week = [];

      for (let i = 0; i < gap; i++) {
        week.push('');
      }
      for (let i = 1; i <= days; i++) {
        week.push(i);
        if ((gap + i) % 7 === 0) {
          calendar.push(week);
          week = [];
        }
      }
      if (week.length) {
        calendar.push(week);
      }

      this.calendar = calendar;
    },
    selectDate(day) {
      // 处理日期选择逻辑
    }
  }
};
</script>

<style scoped>
.calendar {
  display: inline-block;
  padding: 10px;
  border: 1px solid #ccc;
}

.calendar h2 {
  margin: 0 0 10px;
  text-align: center;
}

.calendar table {
  width: 100%;
  table-layout: fixed;
}

.calendar th,
.calendar td {
  padding: 5px;
  text-align: center;
}

.calendar td {
  cursor: pointer;
}

.calendar .selected {
  background-color: #ccc;
}
</style>

<template>
  <div>
    <Calendar></Calendar>
  </div>
</template>

<script>
import Calendar from '@/components/Calendar';

export default {
  components: {
    Calendar
  }
};
</script>