vite.config.ts

import { defineConfig } from 'vite';
import react from '@vitejs/plugin-react-swc';
import { resolve } from 'path';

export default defineConfig({
  plugins: [react()],
  build: {
    target: 'es2021',
    outDir: 'dist',
    rollupOptions: {
      input: {
        popup: resolve(__dirname, 'index.html'),
        background: resolve(__dirname, 'src/background/background.ts')
      },
      output: {
        entryFileNames: chunkInfo => {
          if (chunkInfo.name === 'background') return 'background.js';
          return 'assets/[name]-[hash].js';
        },
        chunkFileNames: 'assets/chunk-[hash].js',
        assetFileNames: 'assets/[name]-[hash][extname]'
      }
    }
  },
  resolve: {
    alias: {
      '@': resolve(__dirname, 'src'),
      '@types': resolve(__dirname, 'src/types')
    }
  }
});