在vite.config.ts中如何获取.env环境变量的值？

export default ({ mode }) => {
  //参数mode为开放模式或生产模式
  //console.log(mode);  // development or product
  const currentEnv = loadEnv(mode, process.cwd()); // 获取.env文件里定义的环境变量
};

const loadEnvByMode = (mode, env) => {
  return loadEnv(mode, process.cwd())[env];
};

export default defineConfig(({ mode }) => {
  // 获取环境变量
  const currentEnv = loadEnv(mode, process.cwd());
  console.log('⭐mode==>', mode);
  console.log('当前环境==>', process.env.NODE_ENV);
  console.log('currentEnv==>', currentEnv);
  return {
    server: {
      open: true,
      host: '0.0.0.0',
      proxy: {
        '/api': {
          target: loadEnvByMode(mode, 'VITE_PROXY_URL'),
          // target: 'https://cloud.whtyinfo.com/dev-bluelinkup/services/ops',
          changeOrigin: true,
          ws: true,
          rewrite: (path) => path.replace(/^\/api/, ''),
          headers: {
            Referer: 'https://cloud.whtyinfo.com',
          },
        },
      },
    },
  };
});