Vuetify:查找v菜单内容的宽度

import Vue from 'vue';
import Vuetify from 'vuetify';
import 'vuetify/dist/vuetify.min.css';
import 'material-design-icons-iconfont/dist/material-design-icons.css';

Vue.use(Vuetify);

<template>
  <v-menu offset-x>
    <template v-slot:activator="{ on }">
      <v-btn v-on="on">Toggle Menu</v-btn>
    </template>
    <v-list>
      <v-list-item v-for="item in menuItems" :key="item.title">
        <v-list-item-title>{{ item.title }}</v-list-item-title>
      </v-list-item>
    </v-list>
  </v-menu>
</template>

export default {
  data() {
    return {
      menuItems: [
        { title: '菜单项1' },
        { title: '菜单项2' },
        { title: '菜单项3' },
      ],
    };
  },
};