vue2自定义下拉导航栏与从vue3自定义下拉导航栏

vue2写法

<template>
  <div class="header">
    <ul>
      <!-- 循环数据在点击调用changeli方法时将当前索引和本条数据传进去,并使用当前数据show的bool值添加或移除样式 -->
      <li :class="[{ active: item.show }]" @click="changeli(index, item)" v-for="(item, index) in global">
        <!-- 在这里打印出boll值方便查看 -->
        {{ item.name }}{{ item.show }}
        <!-- {{ item.name }} -->
        <!-- 判断当前这条数据的bool值如果是true就打开二级菜单,如果是false就关闭二级菜单 -->
        <ul v-show="item.show">
          <!-- 循环二级菜单数据并使用.stop阻止冒泡 -->
          <li v-for="(a, index) in item.children" v-on:click.stop="doThis(index)">{{ a.name }}</li>
        </ul>

      </li>
    </ul>
  </div>
</template>

<script>
export default {
  data() {
    return {
      global: [
        {
          name: '我的',
          children: [
            { name: '订单' },
            { name: '个人中心' }
          ],
          show: false
        },
        {
          name: '设置',
          show: false
        },
        {
          name: '消息',
          children: [
            {
              name: '私信',
            },
            {
              name: '系统设置',

            },
          ],
          show: false
        },
        {
          name: '版本',
          show: false
        },
        {
          name: '退出',
          show: false
        }
      ]
    }
  },
  methods: {
    changeli: function (ind, item) {
      // 先循环数据中的show将其全部置为false,此时模板里的v-if判断生效关闭全部二级菜单,并移除样式
      this.global.forEach(i => {
        console.log(i.show)
        // 判断如果数据中的headerData[i]的show属性不等于当前数据的show属性那么headerData[i]等于false
        if (i.show !== this.global[ind].show) {
          i.show = false;
        };
      });
      // 取反(true或false)
      item.show = !item.show;
      console.log(item.name)
    },
    doThis: function (index) {
      alert(index)
    }
  }
}
</script>

vue3写法

<template>
 	<div class="menu-item" v-for="(item, index) in data.global" :key="index">
      <div class="menu-item-children">
        <router-link to="" class="d-flex align-items-center" @click="handleClick(item, index)"
          :class="item.name == names ? 'bg' : ''">
          <span v-if="menuOpen">{{ item.name }}</span>
          <down-outlined class="triangle" v-if="item.children && menuOpen" :class="item.show ? 'rotate' : ''" />
        </router-link>
        <div v-if="item.show">
          <router-link to="" v-for="(it, ind) in item.children" :key="ind" class="d-flex align-items-center">
            <span>{{ it.name }}</span>
          </router-link>
        </div>
      </div>
    </div>
</template>

<script setup lang="ts">
import { global } from './nav';
import { UpOutlined, DownOutlined } from '@ant-design/icons-vue';
import { storeToRefs } from 'pinia';
import { reactive, ref } from 'vue'
import { cloneDeep } from 'lodash';
import { $api } from '@/api';
//接收父组件传来的值
defineProps<{ menuOpen: boolean, names: string }>();

//克隆global数组数据
const data: { global: any[] } = reactive({
  global: []
});
data.global = cloneDeep(global);
//向父组件传递name值
const emits = defineEmits(['getNames']);

const handleClick = (item, ind) => {
  emits('getNames', item.name)
  data.global.forEach(i => {
    if (i.show !== data.global[ind].show) {
      i.show = false;
    };
  });
  item.show = !item.show;
}
</script>