问Vue.js——如何显示错误的数组元素？

const app = new Vue({
  el: '#app',
  data: {
    keyword: '',
    friends: [
      {
      name: "Donnie",
      age: "20"
    },
    {
        name: "Joanne",
        age:"19",
     },
      {
      name: "David",
      age: "26"
    },
      {
      name: "Peter",
      age: "23"
    },
      {
      name: "John",
      age: "29"
    },
      {
      name: "Jason",
      age: "19"
    },
     ],
  },
  computed: {
    filteredList() {
      return this.friends.filter((friend) => {
        return friend.name.toLowerCase().includes(this.keyword) + friend.age.includes(this.keyword) + friend.name.includes(this.keyword);
      });

      }
    },

  methods:{
      exclude(friend) {
        console.log(!friend.name);
    },
  }

  })

   <div v-for="friend in filteredList" class="card" @click="exclude(friend)">
      {{friend.name}} - {{friend.age}}
    </div>