默认插槽

        1.在Category中创建插槽

<slot>默认值<slot/>

        2.在App中使用

       <Category tittle="美食"> 
         <ul >
         <li v-for="(l,index) in foods" :key="index">{{l}}</li>
        </ul>   
        </Category> 

        3.运行后的效果

        4.不在app中使用插槽的效果

具名插槽,具名之意，就是给插槽附名

        1.定义

          <slot name="games">游戏</slot>  
          <slot name="foods">食物</slot>  

        2.使用

  <div class="container">
    <Category tittle="美食">
      <ul slot="foods">
        <li v-for="(l, index) in games" :key="index">{{ l }}</li>
      </ul>
    </Category>
    <Category tittle="游戏">
      <template slot="games">
        <ul>
          <li v-for="(l, index) in games" :key="index">{{ l }}</li>
        </ul>
      </template>
    </Category>
  </div>

        3.运行，因为我们写了两个插槽，另一个没有被使用就展示的默认值

 作用域插槽（将数据放到子组件中）

        1.子组件

<template>
    <div class="category">
          <h2>{{tittle}}分类</h2>
          <slot name="game" :shiwu="games">游戏</slot>
          <slot name="food" :youxi="foods">食物</slot>  
     
    </div>
</template>

<script>
export default {
 name:"Category",
 props:['tittle'],
   data() {
    return {
      foods: ["香蕉", "苹果", "橙子", "梨", "火锅"],
      games: ["王者", "崩铁", "原神", "火影"],
    }
}
}
</script>

<style scoped>
.category{
    background-color: skyblue;
    width: 200px;
    height: 300px;
}
h2{
    text-align: center;
    background-color: orange;
}
ul li{
    display: flex;
   justify-content: start; 
}
</style>

        2.App组件

<template>
  <div class="container">
    <Category tittle="游戏">
      <template  slot="game" slot-scope="g"> 
        <ul >
          <li v-for="(l, index) in g.shiwu" :key="index">{{ l }}</li>
        </ul>
      </template>
    </Category>

        <Category tittle="食物">
      <template slot="food" slot-scope="f" > 
        <ul>
          <li v-for="(l, index) in f.youxi" :key="index">{{ l }}</li>
        </ul>
      </template>
    </Category>
  </div>
</template>

<script>
import Category from "./components/Category";
export default {
  name: "App",
  components: { Category },
}
</script>



<style scoped>
.container {
  display: flex;
  justify-content: space-around;
}
</style>

        3.运行效果