vue项目中的v-for报错，:key后仍旧无法渲染，如何解决？

vue项目中的v-for报错，:key后仍旧无法渲染

项目组件源码在这

```javascript
<template>
  <div>
    <table style="border:1px solid black;">
        <tr>
            <td>id</td>
            <td>name</td>
            <td>age</td>
            <td>操作</td>
        </tr>
        <tr v-for="(item,index) in students" :key="index">
            <td>{{item.id}}</td>
            <td>{{item.name}}</td>
            <td>{{item.age}}</td>
            <!-- <td>
                <a href="#">删除</a>
                <a href="#">修改</a>
            </td> -->
        </tr>
    </table>
  </div>
</template>

<script>
    export default {
        name: 'Student',
        data () {
            return {
                students:[
                    {id:1,name:小黑,age:18},
                    {id:2,name:老八,age:16},
                    {id:4,name:老王,age:23},
                ]
            }
        },
        components: {}
    }
</script>

<!-- Add "scoped" attribute to limit CSS to this component only -->
<!-- 添加“scoped”属性以将 CSS 限制为仅此组件 -->
<style>

</style>

```

给data中变量students中name值加引号，因为它是字符串

students: [
  { id: 1, name: "小黑", age: 18 },
  { id: 2, name: "老八", age: 16 },
  { id: 4, name: "老王", age: 23 },
]

看控制台报什么错