cómo usar alerta dulce en vue js

npm install -S vue-sweetalert2
// Main Js
import Vue from 'vue'
import VueSweetalert2 from 'vue-sweetalert2';
import App from './App.vue';

Vue.use(VueSweetalert2);

new Vue({
  el: '#app',
  render: h => h(App)
});

// app.vue
<template>
  <!-- button used to trigger event -->
  <button v-on:click="alertDisplay">Click me</button>
</template>

<script>
  export default {
    data() {
      return {
        text: ''
      }
    },
    methods: {
      alertDisplay() {
        // $swal function calls SweetAlert into the application with the specified configuration.
        this.$swal('Heading', 'this is a Heading', 'OK');
      }
    }
  }
<script>
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