如何通过typescript在nuxt中使用sweetalert2？

npm install -g create-nuxt-app
create-nuxt-app my-app
cd my-app
npm install --save-dev typescript @nuxt/typescript-build

npm install sweetalert2

import Vue from 'vue'
import Swal from 'sweetalert2'

import 'sweetalert2/dist/sweetalert2.min.css'

Vue.prototype.$swal = Swal

module.exports = {
  // ...
  plugins: [
    // ...
    { src: '~/plugins/sweetalert2.ts', mode: 'client' },
  ],
  // ...
}

export default {
  methods: {
    showAlert() {
      this.$swal.fire('Hello!', 'Welcome to SweetAlert2!', 'success')
    },
  },
}