具名插槽-动态传入数据

父组件 : 

<template>
  <!-- nav-bar只给一个插槽动态传入数据 -->
  <nav-bar>
    <template v-slot:[position]>
      <a href="#">注册</a>
    </template>
  </nav-bar>
  <button @click=" position = 'left' ">左边</button>
  <button @click=" position = 'center' ">中间</button>
  <button @click=" position = 'right' ">右边</button>
</template>

<script>
  import NavBar from './NavBar.vue'

  export default {
    components: {
      NavBar
    },
    data() {
      return {
        position: "center",
      }
    }
  }
</script>

<style scoped>
</style>

子组件 : 

<template>
  <div class="nav-bar">
    <div class="left">
      <slot name="left">left</slot>
    </div>
    <div class="center">
      <slot name="center">center</slot>
    </div>
    <div class="right">
      <slot name="right">right</slot>
    </div>
  </div>
</template>