@linden.dev/vue-unclassify/vite.config.js

Create Vue 3 script setup SFC from Vue2/3 class based TypeScript SFCs

import { defineConfig } from 'vite'
import vue from '@vitejs/plugin-vue'

// https://vitejs.dev/config/
export default defineConfig({
  plugins: [vue()],
  build: {
    target: 'es2015'
  }
});