UniversalRouter not working on docker release build

Hi everyone,

I’m having an issue making the new version of UniversalRouter implementation working with a docker build on release…

The issue is the following one :

/app/build/webpack:/src/core/router.js:13
const router = new Router(routes)
               ^
TypeError: __WEBPACK_IMPORTED_MODULE_0_universal_router___default.a is not a constructor
    at Object.<anonymous> (/app/build/webpack:/src/core/router.js:13:16)
    at __webpack_require__ (/app/build/webpack:/webpack/bootstrap 2017df5206f6ff8da90a:19:1)
    at Object.<anonymous> (/app/build/server.js:1335:72)
    at __webpack_require__ (/app/build/webpack:/webpack/bootstrap 2017df5206f6ff8da90a:19:1)
    at Object.<anonymous> (/app/build/server.js:9733:18)
    at __webpack_require__ (/app/build/webpack:/webpack/bootstrap 2017df5206f6ff8da90a:19:1)
    at /app/build/webpack:/webpack/bootstrap 2017df5206f6ff8da90a:65:1
    at Object.<anonymous> (/app/build/server.js:71:10)
    at Module._compile (module.js:570:32)
    at Object.Module._extensions..js (module.js:579:10)
    at Module.load (module.js:487:32)
    at tryModuleLoad (module.js:446:12)
    at Function.Module._load (module.js:438:3)
    at Module.runMain (module.js:604:10)
    at run (bootstrap_node.js:394:7)
    at startup (bootstrap_node.js:149:9)
error Command failed with exit code 1.

It works completely fine in development and when building it with the same command found in my docker-compose.yml which is yarn run build -- --release --docker && node build/server.js but it makes the container to exit on my server…

I’m requiring my routes the same way the boilerplate does and I’m on the branch feature/react-intl (merged with Apollo client) just so you know.

If you new some code I’ll post it right away. Meanwhile I’ll try fixing this… 😅

[hxuanhung]

Fixed for me with:

import UniversalRouter from 'universal-router/main';

[frenzzy]

Is this error for client-side or server-side build? React Starter Kit version? Node.js version? Universal Router version? Have you tried this update? https://github.com/kriasoft/react-starter-kit/pull/1403 Also you can try to import this way:

import UniversalRouter from 'universal-router/browser.js'; // for client-side code
import UniversalRouter from 'universal-router/main.js';    // for server-side code
import UniversalRouter from 'universal-router/legacy.js';  // for Node.js v5 and below