Title: ERR_REQUIRE_ESM with @langchain/google-webauth in NestJS (CommonJS) Project

[ialberquilla]

Checked other resources

• I added a very descriptive title to this issue.
• I searched the LangChain.js documentation with the integrated search.
• I used the GitHub search to find a similar question and didn't find it.
• I am sure that this is a bug in LangChain.js rather than my code.
• The bug is not resolved by updating to the latest stable version of LangChain (or the specific integration package).

Example Code

        return new ChatGoogle({
          model: 'gemini-2.5-flash-preview-04-17',
          maxReasoningTokens: 0,
          apiVersion: 'v1beta',
          platformType: 'gai',  
          safetySettings: setSafetySettings(),
          apiKey: configService.get<string>('GOOGLE_AI_API_KEY'), 
        });

Error Message and Stack Trace (if applicable)

/root/repo/agent/backend/node_modules/@langchain/google-webauth/dist/auth.cjs:6
const google_1 = require("web-auth-library/google");
^

Error [ERR_REQUIRE_ESM]: require() of ES Module /root/repo/agent/backend/node_modules/web-auth-library/dist/google/index.js from /root/repo/agent/backend/node_modules/@langchain/google-webauth/dist/auth.cjs not supported.
Instead change the require of index.js in /root/repo/agent/backend/node_modules/@langchain/google-webauth/dist/auth.cjs to a dynamic import() which is available in all CommonJS modules.
at Object. (/root/repo/agent/backend/node_modules/@langchain/google-webauth/dist/auth.cjs:6:18)
at Object. (/root/repo/data-agent/backend/node_modules/@langchain/google-webauth/dist/chat_models.cjs:5:19)
at Object. (/root/repo/data-agent/backend/node_modules/@langchain/google-webauth/dist/index.cjs:17:14)
at Object. (/root/repo/data-agent/backend/node_modules/@langchain/google-webauth/index.cjs:1:18)
// ... (further stack trace related to project structure)
at Object. (/root/repo/data-agent/backend/dist/main.js:4:22) {
code: 'ERR_REQUIRE_ESM'
}

Description

• I'm trying to use the langchain library to: integrate Google services that rely on @langchain/google-webauth within a NestJS (TypeScript, CommonJS) backend application.

• I expect to see: The application to start and run successfully, with @langchain/google-webauth functioning correctly in the CommonJS environment.

• Instead, it does: The application fails to start (or crashes at runtime) with an Error [ERR_REQUIRE_ESM]: require() of ES Module. The error originates from @langchain/google-webauth/dist/auth.cjs attempting to require("web-auth-library/google"), which appears to be an ES Module.

System Info

├── @langchain/community@0.3.42
├── @langchain/google-genai@0.2.6
├── @langchain/google-webauth@0.2.5
├── @langchain/langgraph@0.2.68
├── langchain@0.3.24

node 18.20.5

Also tried with the most recent version of all the packages getting the same error

[habberrih]

Any updates on this? @ialberquilla

[irina-alymova]

+1

[dqbd]

Hello! If you need NodeJS + CJS support for ChatGoogle you need to rely on @langchain/google-gauth package instead of @langchain/google-webauth, which does not ship with CJS outputs (see kriasoft/web-auth-library#18 for more details)

[ialberquilla]

Hello! If you need NodeJS + CJS support for ChatGoogle you need to rely on @langchain/google-gauth package instead of @langchain/google-webauth, which does not ship with CJS outputs (see kriasoft/web-auth-library#18 for more details)

Thank you! that worked to me!