vite.config.ts

import { resolve, join } from 'node:path';
import { existsSync } from 'node:fs';
import { writeFile, rm } from 'node:fs/promises';
import { defineConfig } from 'vite';
import mkcert from 'vite-plugin-mkcert';
import dts from 'vite-plugin-dts';
import tscPaths from 'vite-tsconfig-paths';

const outDir = resolve(__dirname, 'dist');

let port: number;

const getIndexCode = (port: number) => (
    `await import('https://localhost:${port}/@vite/client');
  export * from 'https://localhost:${port}/src/index.ts';`
);

export default defineConfig({
    build: {
        minify: false,
        rollupOptions: {
            output: {
                format: 'es',
                entryFileNames: 'index.js',
            },
            preserveEntrySignatures: 'strict',
            treeshake: 'smallest',
        },
        lib: {
            entry: resolve(__dirname, 'src/index.ts'),
            formats: ['es'],
        },
    },
    publicDir: false,
    plugins: [
        tscPaths(),
        mkcert(),
        dts({
            entryRoot: './src/',
            rollupTypes: true
        }),
        {
            name: 'll-serve',
            apply: 'serve',
            enforce: 'post',
            configureServer(server) {
                server.httpServer!.once('listening', async () => {
                    // @ts-ignore
                    port = server.httpServer.address()['port'];
                    const indexJs = join(outDir, 'index.js')
                    if (existsSync(indexJs)) {
                        await rm(indexJs);
                    }
                    await writeFile(indexJs, getIndexCode(port));
                });
            },
            transform: (code, id) => {
                if (/\.(ts|tsx|js|jsx)$/i.test(id)) return;
                return code.replace(/\/src\//g, `https://localhost:${port}/src/`)
            },
        },
    ]
});