如何从route.params中获取id，在vuex中的数组中查找它，并获取该id的标题字段

import { mapGetters } from 'vuex';

export default {
  computed: {
    ...mapGetters(['getItemById']),
    id() {
      return this.$route.params.id;
    },
    item() {
      return this.getItemById(this.id);
    },
    title() {
      return this.item ? this.item.title : '';
    }
  },
  // ...
}

export default {
  state: {
    items: [
      { id: 1, title: '标题1' },
      { id: 2, title: '标题2' },
      // ...
    ]
  },
  getters: {
    getItemById: (state) => (id) => {
      return state.items.find(item => item.id === id);
    }
  },
  // ...
}