[JavaScript知识库]动态组件的渲染

1、动态组件

1. 什么是动态组件

动态组件指的是动态切换组件的显示与隐藏。

2. 如何实现动态组件渲染

vue 提供了一个内置的 <component>（组件的占位符） 组件，专门用来实现动态组件的渲染。示例代码如下：

<template>
  <div class="goods-tabs">
    <nav>
      <a @click="toggle('GoodsDetail')" :class="{ active: componentName === 'GoodsDetail' }" href="javascript:;"
        >商品详情</a
      >
      <a @click="toggle('GoodesComment')" :class="{ active: componentName === 'GoodesComment' }" href="javascript:;"
        >商品评价<span>(500+)</span></a
      >
    </nav>
    <!-- 切换内容的地方 -->
    <!-- <GoodsDetail></GoodsDetail>
    <GoodesComment /> -->
    <component :is="componentName"></component>
  </div>
</template>

<script>
import GoodsDetail from './goods-detail.vue'
import GoodesComment from './goods-comment.vue'
import { ref } from 'vue'
export default {
  name: 'GoodsTabs',
  components: { GoodsDetail, GoodesComment },
  setup() {
    // 当前组件的名称
    const componentName = ref('GoodsDetail')
    const toggle = name => {
      componentName.value = name
    }
    return { toggle, componentName }
  }
}
</script>

<style lang="less" scoped>
.goods-tabs {
  min-height: 600px;
  background: #fff;
  nav {
    height: 70px;
    line-height: 70px;
    display: flex;
    border-bottom: 1px solid #f5f5f5;
    a {
      padding: 0 40px;
      font-size: 18px;
      position: relative;
      > span {
        color: @priceColor;
        font-size: 16px;
        margin-left: 10px;
      }
      &:first-child {
        border-right: 1px solid #f5f5f5;
      }
      &.active {
        &::before {
          content: '';
          position: absolute;
          left: 40px;
          bottom: -1px;
          width: 72px;
          height: 2px;
          background: @xtxColor;
        }
      }
    }
  }
}
</style>