Module is a CommonJS module, which may not support all module.exports as named exports.

[alivadjid]

Reporting a bug?

Hello!
I'm using vite-ssr-plugin with vue3 and i18n with unplugin-vue-i18n
On build mode I have an error. But on dev mode everything is great.

import { useI18n, createI18n } from "vue-i18n/dist/vue-i18n.runtime.esm-bundler.js";
                  ^^^^^^^^^^
SyntaxError: Named export 'createI18n' not found. The requested module 'vue-i18n/dist/vue-i18n.runtime.esm-bundler.js' is a CommonJS module, which may not support all module.exports as named exports.
CommonJS modules can always be imported via the default export, for example using:

import pkg from 'vue-i18n/dist/vue-i18n.runtime.esm-bundler.js';
const { useI18n, createI18n } = pkg;

Found this comment about this problem, intlify/vue-i18n-next#1131 (comment)
And explanation vuejs/core#4814 (comment)
Also there are solution for vite-plugin-vue-i18n #172
But I can't find solutions for unplugin-vue-i18n

Also opened issue in repo vite-plugin-ssr vikejs/vike#634

If change ssr parameter in vite.config.ts - building is successfull.

According to the documentation ssr can be customized with 4 keys. I'm trying to find out wich key is causing build error.

Expected behavior

No error on build mode

Reproduction

  "dependencies": {
    "@intlify/unplugin-vue-i18n": "0.8.1",
    "@mdi/font": "7.1.96",
    "@types/compression": "1.7.2",
    "@types/express": "4.17.16",
    "@types/node": "18.11.18",
    "@vitejs/plugin-vue": "4.0.0",
    "@vue/compiler-sfc": "3.2.45",
    "@vue/server-renderer": "3.2.45",
    "axios": "1.2.6",
    "compression": "1.7.4",
    "cross-env": "7.0.3",
    "express": "4.18.2",
    "roboto-fontface": "0.10.0",
    "sass": "1.57.1",
    "sass-loader": "13.2.0",
    "sirv": "2.0.2",
    "ts-node": "10.9.1",
    "typescript": "4.9.4",
    "vite": "4.0.4",
    "vite-plugin-ssr": "0.4.72",
    "vite-plugin-vuetify": "1.0.2",
    "vue": "3.2.45",
    "vue-i18n": "9.2.2",
    "vuetify": "3.1.2"
  },
  "type": "module",
  "devDependencies": {
    "@mdi/js": "7.1.96",
    "eslint": "8.33.0",
    "eslint-import-resolver-typescript": "3.5.3",
    "eslint-plugin-import": "2.27.5",
    "eslint-plugin-vue": "9.9.0",
    "vite-plugin-pwa": "0.14.1",
    "vite-svg-loader": "4.0.0",
    "vitepress": "1.0.0-alpha.43"
  }

Issue Package

unplugin-vue-i18n

System Info

Linux 5.15.0-58-generic #64-Ubuntu SMP x86_64 x86_64 x86_64 GNU/Linux

Screenshot

Additional context

In vite.config.ts config file

import vue from '@vitejs/plugin-vue';
import ssr from 'vite-plugin-ssr/plugin';
import VueI18nPlugin from '@intlify/unplugin-vue-i18n/vite';

const config: UserConfig = {
  plugins: [
    vue(),
    ssr({ prerender: true, includeAssetsImportedByServer: true }),// If put here ssr(), without parametrs - building successfull, without errors
    VueI18nPlugin({
      include: resolve(dirname(fileURLToPath(import.meta.url)), './locales/dictionary/**'),
    }),
  ],

  resolve: {
    alias: {
      'vue-i18n': 'vue-i18n/dist/vue-i18n.runtime.esm-bundler.js',
    },
  },
};

createI18n used in app.ts with this:

import messages from '@intlify/unplugin-vue-i18n/messages';

export { createApp };

function createApp(pageContext: PageContext) {
  const { Page, pageProps } = pageContext;

  const i18n = createI18n({
    legacy: false,
    locale: pageContext.locale,
    fallbackLocale: 'en',
    messages,
  
  });

  const PageWithLayout = defineComponent({
    render() {
      return h(
        PageShell,
        {},
        {
          default() {
            return h(Page, pageProps || {});
          },
        }
      );
    },
  });

  const app = createSSRApp(PageWithLayout);

  app.use(i18n);
  app.use(vuetify);
  app.use(CountryFlag);

  app.provide('pageContext', pageContext);

  setPageContext(app, pageContext);

  return app;
}

Validations

• Read the Contributing Guidelines.
• Read the README
• Check that there isn't already an issue that reports the same bug to avoid creating a duplicate.
• Check that this is a concrete bug. For Q&A open a GitHub Discussion.

[alivadjid]

after some updates error changed

[lermontex]

The same error with @intlify/unplugin-vue-i18n 0.8.2

file:///srv/app/dist/server/entry-server.js:8
import { useI18n, createI18n } from "vue-i18n/dist/vue-i18n.runtime.esm-bundler.js";
                  ^^^^^^^^^^
SyntaxError: Named export 'createI18n' not found. The requested module 'vue-i18n/dist/vue-i18n.runtime.esm-bundler.js' is a CommonJS module, which may not support all module.exports as named exports.
CommonJS modules can always be imported via the default export, for example using:

import pkg from 'vue-i18n/dist/vue-i18n.runtime.esm-bundler.js';
const { useI18n, createI18n } = pkg;

at ModuleJob._instantiate (node:internal/modules/esm/module_job:124:21)
at async ModuleJob.run (node:internal/modules/esm/module_job:190:5)

[WangJincheng4869]

我也遇见类似的问题，我是在项目中集成了vuepress2，想在vuepress展示自己开发的组件。结果导致无法执行pnpm docs:build。异常信息如下：

import { createI18n, useI18n } from "vue-i18n/dist/vue-i18n.runtime.esm-bundler.js";
         ^^^^^^^^^^
SyntaxError: Named export 'createI18n' not found. The requested module 'vue-i18n/dist/vue-i18n.runtime.esm-bundler.js' is a CommonJS module, which may not support all module.exports as named exports.
CommonJS modules can always be imported via the default export, for example using:

import pkg from 'vue-i18n/dist/vue-i18n.runtime.esm-bundler.js';
const { createI18n, useI18n } = pkg;

    at ModuleJob._instantiate (node:internal/modules/esm/module_job:124:21)
    at async ModuleJob.run (node:internal/modules/esm/module_job:190:5)
 ELIFECYCLE  Command failed with exit code 1.

[alivadjid]

Well, for solve this error i removed i18n from project, and tried to use self-written package for internationalization.

[lermontex]

@alivadjid, The issue is with the Vite plugin unplugin-vue-i18n, not vue-i18n. The unplugin-vue-i18n plugin is optional for vue-i18n. You can import messages yourself, as described in the documentation.

However, it is very sad that the declared functionality of this plugin does not work.

[WangJincheng4869]

@alivadjid 我也有类似的问题，我找到了一个折衷方案，希望能够帮助到您，下方是我的的配置：（I have similar problems. I have found a compromise that I hope will help you. Below is my configuration:）

ssr: {
        /**
         * 由于在 build 时会报错 SyntaxError: Named export 'createI18n' not found.
         * The requested module 'vue-i18n/dist/vue-i18n.runtime.esm-bundler.js' is a CommonJS module, which may not support all module.exports as named exports.
         * 所以要添加以下配置。详见：https://vite-plugin-ssr.com/common-issues 与 https://vite-plugin-ssr.com/invalid-esm#solution
         */
        noExternal: ['vue-i18n']
      }

[SuzanaK]

@WangJincheng4869 Your solution fixed my production build but then I could not start my App in dev mode anymore ("module not found"). I uninstalled unplugin-vue-i18n and used vue-i18n directly and now it works in dev and prod.

[lencil]

@WangJincheng4869 Your solution fixed my production build but then I could not start my App in dev mode anymore ("module not found"). I uninstalled unplugin-vue-i18n and used vue-i18n directly and now it works in dev and prod.
use
const isProduction = process.env.NODE_ENV === 'production';

to do some special case in vite config file.