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!

[hntrl]

Going to close this. We have a sort of awkward dependency graph to support different environments with google because of the downstream deps we use. This comment explains it well, and we're planning to rectify some of these changes here. If you have any issues with the setup that @dqbd described, please feel free to open a new issue.