vue实现一个tab栏

Vue 实现 Tab 栏

基础实现（选项式 API）

<template>
  <div class="tab-container">
    <div class="tab-header">
      <button 
        v-for="(tab, index) in tabs" 
        :key="index"
        @click="activeTab = index"
        :class="{ 'active': activeTab === index }"
      >
        {{ tab.title }}
      </button>
    </div>
    <div class="tab-content">
      <div v-for="(tab, index) in tabs" :key="index" v-show="activeTab === index">
        {{ tab.content }}
      </div>
    </div>
  </div>
</template>

<script>
export default {
  data() {
    return {
      activeTab: 0,
      tabs: [
        { title: 'Tab 1', content: 'Content for Tab 1' },
        { title: 'Tab 2', content: 'Content for Tab 2' },
        { title: 'Tab 3', content: 'Content for Tab 3' }
      ]
    }
  }
}
</script>

<style>
.tab-header {
  display: flex;
  gap: 10px;
  margin-bottom: 10px;
}

.tab-header button {
  padding: 8px 16px;
  background: none;
  border: 1px solid #ddd;
  cursor: pointer;
}

.tab-header button.active {
  background: #007bff;
  color: white;
  border-color: #007bff;
}

.tab-content {
  border: 1px solid #ddd;
  padding: 20px;
}
</style>

组合式 API 实现

<template>
  <div class="tab-container">
    <div class="tab-header">
      <button 
        v-for="(tab, index) in tabs" 
        :key="index"
        @click="activeTab = index"
        :class="{ 'active': activeTab === index }"
      >
        {{ tab.title }}
      </button>
    </div>
    <div class="tab-content">
      <component :is="tabs[activeTab].component" />
    </div>
  </div>
</template>

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

const activeTab = ref(0)
const tabs = [
  { title: 'Tab 1', component: Tab1Content },
  { title: 'Tab 2', component: Tab2Content }
]
</script>

动态组件实现

<template>
  <div class="tab-container">
    <div class="tab-header">
      <button 
        v-for="(tab, index) in tabs" 
        :key="index"
        @click="activeTab = tab.component"
        :class="{ 'active': activeTab === tab.component }"
      >
        {{ tab.title }}
      </button>
    </div>
    <div class="tab-content">
      <keep-alive>
        <component :is="activeTab" />
      </keep-alive>
    </div>
  </div>
</template>

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

const activeTab = shallowRef(Tab1Content)
const tabs = [
  { title: 'Tab 1', component: Tab1Content },
  { title: 'Tab 2', component: Tab2Content }
]
</script>

路由集成实现

<template>
  <div class="tab-container">
    <router-link 
      v-for="(tab, index) in tabs" 
      :key="index"
      :to="tab.path"
      custom
      v-slot="{ navigate, isActive }"
    >
      <button 
        @click="navigate"
        :class="{ 'active': isActive }"
      >
        {{ tab.title }}
      </button>
    </router-link>
    <div class="tab-content">
      <router-view />
    </div>
  </div>
</template>

<script setup>
const tabs = [
  { title: 'Tab 1', path: '/tab1' },
  { title: 'Tab 2', path: '/tab2' }
]
</script>

注意事项

• 使用 shallowRef 替代 ref 可以避免不必要的组件重新渲染
• keep-alive 可以缓存组件状态，避免切换时重复渲染
• 路由集成时注意配置对应的路由规则
• 样式可以根据需求自定义，示例仅提供基础样式