vite.config.js

import { defineConfig } from 'vite'
import { svelte } from '@sveltejs/vite-plugin-svelte'
import { resolve } from 'path'

// https://vitejs.dev/config/
export default defineConfig({
    plugins: [svelte()],
    build: {
        lib: {
            // Could also be a dictionary or array of multiple entry points
            entry: resolve(__dirname, 'src/main.js'),
            name: 'utcitwpfetcher',
            // the proper extensions will be added
            fileName: 'utcitwpfetcher',
        },
        rollupOptions: {
            // make sure to externalize deps that shouldn't be bundled
            // into your library
            // external: ['vue'],
            output: {
                // Provide global variables to use in the UMD build
                // for externalized deps
                globals: {
                    // vue: 'Vue',
                },
            },
        },
    },
})