VUE3 入門チュートリアル: Vue.js プラグインを使用してリージョン セレクター コンポーネントをカプセル化する

// Define a plugin object
const AreaPickerPlugin = {
    install(app) {
        // Define a global component
        app.component('area-picker', {
            // Add component options
        })
    }
}

// Export the plugin object
export default AreaPickerPlugin

<template>
  <div class="area-picker">
    <select v-model="selectedProvince" @change="provinceChanged">
      <option value="">请选择省份</option>
      <option v-for="province in provinces" :value="province">{{ province.name }}</option>
    </select>
    <select v-model="selectedCity" @change="cityChanged" :disabled="!cities.length">
      <option value="">请选择城市</option>
      <option v-for="city in cities" :value="city">{{ city.name }}</option>
    </select>
    <select v-model="selectedArea" @change="areaChanged" :disabled="!areas.length">
      <option value="">请选择区县</option>
      <option v-for="area in areas" :value="area">{{ area.name }}</option>
    </select>
    <select v-model="selectedStreet" :disabled="!streets.length">
      <option value="">请选择乡镇街道</option>
      <option v-for="street in streets" :value="street">{{ street.name }}</option>
    </select>
  </div>
</template>

<script>
export default {
  data() {
    return {
      selectedProvince: '',
      selectedCity: '',
      selectedArea: '',
      selectedStreet: '',
      provinces: [],
      cities: [],
      areas: [],
      streets: [],
    }
  },
  methods: {
    provinceChanged() {
      // Update cities
      // Reset areas, streets
    },
    cityChanged() {
      // Update areas
      // Reset streets
    },
    areaChanged() {
      // Update streets
    },
    loadData() {
      // Load data from API
    }
  },
  mounted() {
    this.loadData();
  }
};
</script>

<style>
.area-picker {
  display: flex;
  flex-wrap: wrap;
}

select {
  margin-right: 10px;
}
</style>

import AreaPicker from './AreaPicker.vue';

const AreaPickerPlugin = {
  // Define the install function
  install(app) {
    // Register the global component
    app.component('area-picker', AreaPicker);
  }
};

export default AreaPickerPlugin;

<template>
  <div>
    <area-picker />
  </div>
</template>

<script>
import AreaPickerPlugin from './plugins/AreaPickerPlugin';

export default {
  // Install the plugin
  created() {
    this.$use(AreaPickerPlugin);
  },
};
</script>