vue3实现一个滚动日期选择器组件

好的，我可以为您提供一个简单的滚动日期选择器组件的实现，基于 Vue 3。

首先，您需要安装以下依赖项：

npm install dayjs -S

接下来，您可以创建一个名为 `DatePicker.vue` 的组件，代码如下：

<template>
  <div class="date-picker">
    <div class="picker-header">
      <button @click="previousYear">&lt;&lt;</button>
      <button @click="previousMonth">&lt;</button>
      <span class="picker-title">{{ currentMonth }}</span>
      <button @click="nextMonth">&gt;</button>
      <button @click="nextYear">&gt;&gt;</button>
    </div>
    <div class="picker-body">
      <div class="picker-row" v-for="week in weeks" :key="week">
        <div class="picker-cell" v-for="(day, index) in week" :key="index" :class="{ 'is-today': isToday(day), 'is-selected': isSelected(day) }" @click="selectDate(day)">
          {{ day }}
        </div>
      </div>
    </div>
  </div>
</template>

<script>
import dayjs from 'dayjs';

export default {
  name: 'DatePicker',

  props: {
    value: {
      type: Date,
      required: true,
    },
  },

  data() {
    return {
      currentDate: dayjs(this.value),
    };
  },

  computed: {
    currentMonth() {
      return this.currentDate.format('MMMM YYYY');
    },

    weeks() {
      const firstDay = this.currentDate.startOf('month').startOf('week');
      const lastDay = this.currentDate.endOf('month').endOf('week');

      const days = [];
      let day = firstDay;

      while (day.isBefore(lastDay)) {
        days.push(day);
        day = day.add(1, 'day');
      }

      return days.reduce((acc, day) => {
        const week = Math.floor(day.diff(firstDay, 'day') / 7);
        if (!acc[week]) {
          acc[week] = [];
        }
        acc[week].push(day.format('D'));
        return acc;
      }, []);
    },
  },

  methods: {
    isToday(day) {
      return dayjs().isSame(this.currentDate.date(day));
    },

    isSelected(day) {
      return this.currentDate.isSame(dayjs().date(day));
    },

    selectDate(day) {
      const newDate = this.currentDate.date(day);
      this.$emit('input', newDate.toDate());
      this.currentDate = newDate;
    },

    previousMonth() {
      this.currentDate = this.currentDate.subtract(1, 'month');
    },

    nextMonth() {
      this.currentDate = this.currentDate.add(1, 'month');
    },

    previousYear() {
      this.currentDate = this.currentDate.subtract(1, 'year');
    },

    nextYear() {
      this.currentDate = this.currentDate.add(1, 'year');
    },
  },
};
</script>

<style scoped>
.date-picker {
  display: inline-block;
  border: 1px solid #ccc;
  border-radius: 4px;
  padding: 8px;
  font-size: 14px;
}

.picker-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
}

.picker-title {
  font-weight: bold;
}

.picker-row {
  display: flex;
}

.picker-cell {
  flex: 1;
  text-align: center;
  cursor: pointer;
}

.is-today {
  font-weight: bold;
}

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

在您的应用程序中使用此组件时，您可以使用 `v-model` 指令来双向绑定选定的日期值，如下所示：

<template>
  <div>
    <date-picker v-model="selectedDate"></date-picker>
    <p>You selected: {{ selectedDate }}</p>
  </div>
</template>

<script>
import DatePicker from './DatePicker.vue';

export default {
  components: {
    DatePicker,
  },

  data() {
    return {
      selectedDate: new Date(),
    };
  },
};
</script>

这个日期选择器组件会显示当前月份的日历，并且允许您通过向左或向右滚动来选择不同的月份和年份。当您选择日期时，它将更新选定的日期值，并将其传递回父组件。