vue快速入门（五十七）作用域插槽

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新增内容
作用域插槽实现表格删除数据

源码

App.vue

<template>
  <div id="app">
    <!-- 向子组件传值 -->
  <MyTable :tableData="tableData">
    <!-- 接收子组件的传值，默认是对象格式，可以直接解构 -->
  <template #default="obj">
    <button @click="del(obj.id)">移除</button>
  </template>
</MyTable>
  </div>
</template>
<script>
import MyTable from "./components/MyTable.vue";
export default {
  name: "App",
  components: {
    MyTable
  },
  data() {
    return {
      tableData: [
        {
            id:1,name:'张三',age:18,major:'计算机',score:90
        },
        {
            id:2,name:'李四',age:19,major:'计算机',score:80
        },
        {
            id:3,name:'王五',age:20,major:'计算机',score:70
        },
        {
            id:4,name:'赵六',age:21,major:'计算机',score:60
        },
        {
            id:5,name:'孙七',age:22,major:'计算机',score:50
        }
      ],
    };
  },
  methods: {
    del(id){
      this.tableData = this.tableData.filter(item=>item.id !== id)
    }
  }
};
</script>
<style lang="less">

</style>

MyTable.vue

<template>
    <div id="Mytable">
        <table border="2">
            <thead>
                <tr>
                    <th>ID</th>
                    <th>姓名</th>
                    <th>专业</th>
                    <th>评分</th>
                    <th>操作</th>
                </tr>
            </thead>
            <tbody>
                <tr v-for="item in tableData" :key="item.id">
                    <td>{{item.id}}</td>
                    <td>{{item.name}}</td>
                    <td>{{item.major}}</td>
                    <td>{{item.score}}</td>
                    <td>
                        <!-- 定义插槽，并且向父组件传值 -->
                        <slot :id="item.id"></slot>
                    </td>
                </tr>
            </tbody>
        </table>
    </div>
</template>

<script>
    export default {
        // 接收父组件传递过来的数据
        props:['tableData']
    }
</script>

<style lang="less" scoped>
td,th{
    text-align: center;
    width: 100px;
    height: 30px;
}
</style>