vue3_element_demo1/src/components/ChildComponentA.vue

<template>
  <div class="wrap">
    <div class="header">
      <slot name="header">错误</slot>
      <div class="close">关闭</div>
    </div>
    <div>
      <slot :types="types"></slot>
    </div>
    <div class="footer">
      <slot name="footer" :types="types" :sources="sources"></slot>
    </div>
  </div>
</template>

<script>
export default {
  data() {
    return {
      types: {
        404: 'Page Not Found',
        500: 'System Error',
      },
      sources: {
        system: '系统',
        page: '页面',
        console: '控制台',
      }
    }
  }
}
</script>

<style scoped>
.wrap {
  border: 1px solid #f66;
  color: #f66;
  padding: 10px;
  position: relative;
  max-width: 300px;
}

.header {
  font-size: 20px;
  color: #333;
  font-weight: bold;
}

.close {
  position: absolute;
  right: 10px;
  top: 10px;
}

.footer {
  color: #666;
  font-size: 12px;
  text-align: right;
}
</style>