<template>
  <div class="header">
      这是头部 {{bookId}}
  </div>
</template>

<script>
    export default {
        props: {
            bookId: {
                type: Number,
                required: true
            }
        }
    }
</script>

<style>
    .header {
        background-color: gray;
        height: 60px;
        line-height: 60px;
        color: #ffffff;
        font-size: 20px;
    }
</style>