App.vue
file.txt
main.js
 
<template>
  <div>
    <button @click="fetchData">Fetch Data</button>
    <pre v-if="data">{{ data }}</pre>
  </div>
</template>

<script>
export default {
  data() {
    return {
      data: null,
    };
  },
  methods: {
    async fetchData() {
      const response = await fetch("file.txt");
      this.data = await response.text();
    }
  }
};
</script>                  
Hello World!                  
import { createApp } from 'vue'

import App from './App.vue'

const app = createApp(App)
app.mount('#app')
                  
http://localhost:5173/