如何使Vue可排序在表上工作？

<template>
  <div>
    <table>
      <thead>
        <tr>
          <th @click="sortTable('name')">Name</th>
          <th @click="sortTable('age')">Age</th>
          <th @click="sortTable('email')">Email</th>
        </tr>
      </thead>
      <tbody>
        <tr v-for="item in sortedData" :key="item.id">
          <td>{{ item.name }}</td>
          <td>{{ item.age }}</td>
          <td>{{ item.email }}</td>
        </tr>
      </tbody>
    </table>
  </div>
</template>

<script>
export default {
  data() {
    return {
      tableData: [
        { id: 1, name: 'John', age: 25, email: 'john@example.com' },
        { id: 2, name: 'Jane', age: 30, email: 'jane@example.com' },
        { id: 3, name: 'Bob', age: 20, email: 'bob@example.com' }
      ],
      sortColumn: '',
      sortOrder: 'asc'
    };
  },
  computed: {
    sortedData() {
      const data = [...this.tableData];
      if (this.sortColumn) {
        data.sort((a, b) => {
          const fieldA = a[this.sortColumn];
          const fieldB = b[this.sortColumn];
          if (fieldA < fieldB) {
            return this.sortOrder === 'asc' ? -1 : 1;
          }
          if (fieldA > fieldB) {
            return this.sortOrder === 'asc' ? 1 : -1;
          }
          return 0;
        });
      }
      return data;
    }
  },
  methods: {
    sortTable(column) {
      if (this.sortColumn === column) {
        this.sortOrder = this.sortOrder === 'asc' ? 'desc' : 'asc';
      } else {
        this.sortColumn = column;
        this.sortOrder = 'asc';
      }
    }
  }
};
</script>

<style scoped>
table {
  width: 100%;
  border-collapse: collapse;
}

th, td {
  padding: 8px;
  text-align: left;
  border-bottom: 1px solid #ddd;
}

th {
  cursor: pointer;
}
</style>