Open your website by double-clicking the index.html locally without a file server.

npm install vite-plugin-support-file

Add to your Vite config:

// vite.config.js
import { defineConfig } from 'vite';
import supportFile from 'vite-plugin-support-file';

export default defineConfig({
  plugins: [
    supportFile()
  ]
});

npm run build

Enjoy~

1. change Rollup output format to systemjs
2. inject s.min.js into index.html