Vue3 Element Plus el-tabs数据刷新实现方式

<template>
  <el-tabs v-model="activeTab" @tab-change="handleTabChange">
    <el-tab-pane label="Tab 1" name="tab1">
      <div v-if="activeTab === 'tab1'">
        <!-- 内容1 -->
        {{ tab1Data }}
      </div>
    </el-tab-pane>
    <el-tab-pane label="Tab 2" name="tab2">
      <div v-if="activeTab === 'tab2'">
        <!-- 内容2 -->
        {{ tab2Data }}
      </div>
    </el-tab-pane>
  </el-tabs>
</template>

<script setup>
import { ref } from 'vue';

const activeTab = ref('tab1');
const tab1Data = ref(null);
const tab2Data = ref(null);

const handleTabChange = (tabName) => {
  if (tabName === 'tab1') {
    fetchTab1Data();
  } else if (tabName === 'tab2') {
    fetchTab2Data();
  }
};

const fetchTab1Data = async () => {
  // 模拟API请求
  tab1Data.value = await new Promise(resolve => {
    setTimeout(() => resolve('Tab 1 数据已刷新'), 500);
  });
};

const fetchTab2Data = async () => {
  // 模拟API请求
  tab2Data.value = await new Promise(resolve => {
    setTimeout(() => resolve('Tab 2 数据已刷新'), 500);
  });
};

// 初始化加载第一个tab的数据
fetchTab1Data();
</script>

<template>
  <el-tabs v-model="activeTab">
    <el-tab-pane label="Tab 1" name="tab1">
      <Tab1Content v-if="activeTab === 'tab1'" />
    </el-tab-pane>
    <el-tab-pane label="Tab 2" name="tab2">
      <Tab2Content v-if="activeTab === 'tab2'" />
    </el-tab-pane>
  </el-tabs>
</template>

<script setup>
import { ref } from 'vue';
import Tab1Content from './Tab1Content.vue';
import Tab2Content from './Tab2Content.vue';

const activeTab = ref('tab1');
</script>

<!-- Tab1Content.vue -->
<script setup>
import { onMounted, ref } from 'vue';

const data = ref(null);

onMounted(async () => {
  // 加载数据
  data.value = await fetchData();
});
</script>

<template>
  <el-tabs v-model="activeTab">
    <el-tab-pane label="Tab 1" name="tab1">
      <keep-alive>
        <Tab1Content v-if="activeTab === 'tab1'" />
      </keep-alive>
    </el-tab-pane>
    <el-tab-pane label="Tab 2" name="tab2">
      <keep-alive>
        <Tab2Content v-if="activeTab === 'tab2'" />
      </keep-alive>
    </el-tab-pane>
  </el-tabs>
</template>

<!-- Tab1Content.vue -->
<script setup>
import { ref, activated } from 'vue';

const data = ref(null);

const loadData = async () => {
  data.value = await fetchData();
};

// 组件激活时加载数据
activated(() => {
  loadData();
});

// 初始加载
loadData();
</script>