v-for中key-优快云博客

本文链接：https://blog.youkuaiyun.com/wowocpp/article/details/132586412

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code

<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
</head>

<body>

  <div id="app">
    <h3>小黑的书架</h3>
    <ul>
      <li v-for="(item,index) in booksList" :key="item.id">
        <span>{{ item.name }}</span>
        <span>{{ item.author }}</span>
        <button @click="del(item.id)">删除</button>
      </li>
    </ul>
  </div>
  <!-- <script src="https://cdn.jsdelivr.net/npm/vue@2/dist/vue.js"></script> -->
  <script src="https://cdn.bootcdn.net/ajax/libs/vue/2.7.14/vue.js"></script>

  <script>
    const app = new Vue({
      el: '#app',
      data: {
        booksList: [
          { id: 1, name: '《红楼梦》', author: '曹雪芹' },
          { id: 2, name: '《西游记》', author: '吴承恩' },
          { id: 3, name: '《水浒传》', author: '施耐庵' },
          { id: 4, name: '《三国演义》', author: '罗贯中' }
        ]
      },
      methods: {
        del(id) {
          this.booksList = this.booksList.filter(item => item.id !== id)
        }
      }
    })
  </script>
</body>

</html>