langchain-ai / langchainjs

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Uncaught SyntaxError: Invalid left-hand side in assignment (at bundle.js:23932:5) when importing "ChatCohere" in ReactJs from "@langchain/cohere" #6860

Open pratham-jaiswal opened 1 day ago

pratham-jaiswal commented 1 day ago

Checked other resources

Example Code

Minimum reproduceable code:

import React, { useState } from "react";
import { ChatCohere } from "@langchain/cohere";

const App = () => {
  return (
    <div>
      <h1>hi</h1>
    </div>
  );
};

export default App;

Error Message and Stack Trace (if applicable)

The only error I'm getting is the following

Uncaught SyntaxError: Invalid left-hand side in assignment (at bundle.js:23926:5)

Which is coming from import { ChatCohere } from "@langchain/cohere";

bundle.js:23926:5 :

({"NODE_ENV":"development","PUBLIC_URL":"","WDS_SOCKET_HOST":undefined,"WDS_SOCKET_PATH":undefined,"WDS_SOCKET_PORT":undefined,"FAST_REFRESH":true}) = previousEnv; 

image

Description

I am trying to use the ChatCohere integration in a React project by importing it from the @langchain/cohere package. I expect the import to work correctly, allowing me to interact with the Cohere LLM in my application. However, upon importing, I am encountering a runtime aforementioned error, which prevents the application from functioning as expected. This error points to the bundle.js file and only occurs when I import ChatCohere.

System Info

yarn info langchain
Expand to see result ```sh yarn info v1.22.22 warning package.json: No license field { name: 'langchain', 'dist-tags': { next: '0.3.2-rc.0', latest: '0.3.2', 'tag-for-publishing-older-releases': '0.2.20' }, versions: [ '0.0.4', '0.0.5', '0.0.6', '0.0.7', '0.0.8', '0.0.9', '0.0.10', '0.0.11', '0.0.12', '0.0.13', '0.0.14', '0.0.15', '0.0.16', '0.0.17', '0.0.18', '0.0.19', '0.0.20', '0.0.21', '0.0.22', '0.0.23', '0.0.24', '0.0.25', '0.0.26', '0.0.27', '0.0.28', '0.0.29', '0.0.30', '0.0.31', '0.0.32', '0.0.33', '0.0.34', '0.0.35', '0.0.36', '0.0.37', '0.0.38', '0.0.39', '0.0.40', '0.0.41', '0.0.42', '0.0.43', '0.0.44', '0.0.45', '0.0.46', '0.0.47', '0.0.48', '0.0.49-0', '0.0.49-1', '0.0.49', '0.0.50', '0.0.51', '0.0.52-0', '0.0.52', '0.0.53', '0.0.54', '0.0.55', '0.0.56', '0.0.57', '0.0.58', '0.0.59', '0.0.60', '0.0.61', '0.0.62', '0.0.63', '0.0.64', '0.0.65', '0.0.66', '0.0.67', '0.0.68', '0.0.69', '0.0.70', '0.0.71', '0.0.72', '0.0.73', '0.0.74', '0.0.75', '0.0.76', '0.0.77', '0.0.78', 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'./chains/query_constructor.d.cts' }, import: './chains/query_constructor.js', require: './chains/query_constructor.cjs' }, './document_loaders/fs/json': { types: { import: './document_loaders/fs/json.d.ts', default: './document_loaders/fs/json.d.ts', require: './document_loaders/fs/json.d.cts' }, import: './document_loaders/fs/json.js', require: './document_loaders/fs/json.cjs' }, './document_loaders/fs/text': { types: { import: './document_loaders/fs/text.d.ts', default: './document_loaders/fs/text.d.ts', require: './document_loaders/fs/text.d.cts' }, import: './document_loaders/fs/text.js', require: './document_loaders/fs/text.cjs' }, './retrievers/time_weighted': { types: { import: './retrievers/time_weighted.d.ts', default: './retrievers/time_weighted.d.ts', require: './retrievers/time_weighted.d.cts' }, import: './retrievers/time_weighted.js', require: './retrievers/time_weighted.cjs' }, './schema/query_constructor': { types: { import: './schema/query_constructor.d.ts', default: './schema/query_constructor.d.ts', require: './schema/query_constructor.d.cts' }, import: './schema/query_constructor.js', require: './schema/query_constructor.cjs' }, './stores/message/in_memory': { types: { import: './stores/message/in_memory.d.ts', default: './stores/message/in_memory.d.ts', require: './stores/message/in_memory.d.cts' }, import: './stores/message/in_memory.js', require: './stores/message/in_memory.cjs' }, './experimental/openai_files': { types: { import: './experimental/openai_files.d.ts', default: './experimental/openai_files.d.ts', require: './experimental/openai_files.d.cts' }, import: './experimental/openai_files.js', require: './experimental/openai_files.cjs' }, './output_parsers/expression': { types: { import: './output_parsers/expression.d.ts', default: './output_parsers/expression.d.ts', require: './output_parsers/expression.d.cts' }, import: './output_parsers/expression.js', require: './output_parsers/expression.cjs' }, './agents/react/output_parser': { types: { import: './agents/react/output_parser.d.ts', default: './agents/react/output_parser.d.ts', require: './agents/react/output_parser.d.cts' }, import: './agents/react/output_parser.js', require: './agents/react/output_parser.cjs' }, './document_loaders/fs/buffer': { types: { import: './document_loaders/fs/buffer.d.ts', default: './document_loaders/fs/buffer.d.ts', require: './document_loaders/fs/buffer.d.cts' }, import: './document_loaders/fs/buffer.js', require: './document_loaders/fs/buffer.cjs' }, './retrievers/parent_document': { types: { import: './retrievers/parent_document.d.ts', default: './retrievers/parent_document.d.ts', require: './retrievers/parent_document.d.cts' }, import: './retrievers/parent_document.js', require: './retrievers/parent_document.cjs' }, './retrievers/score_threshold': { types: { import: './retrievers/score_threshold.d.ts', default: './retrievers/score_threshold.d.ts', require: './retrievers/score_threshold.d.cts' }, import: './retrievers/score_threshold.js', require: './retrievers/score_threshold.cjs' }, './agents/openai/output_parser': { types: { import: './agents/openai/output_parser.d.ts', default: './agents/openai/output_parser.d.ts', require: './agents/openai/output_parser.d.cts' }, import: './agents/openai/output_parser.js', require: './agents/openai/output_parser.cjs' }, './chains/query_constructor/ir': { types: { import: './chains/query_constructor/ir.d.ts', default: './chains/query_constructor/ir.d.ts', require: './chains/query_constructor/ir.d.cts' }, import: './chains/query_constructor/ir.js', require: './chains/query_constructor/ir.cjs' }, './agents/format_scratchpad/log': { types: { import: './agents/format_scratchpad/log.d.ts', default: './agents/format_scratchpad/log.d.ts', require: './agents/format_scratchpad/log.d.cts' }, import: './agents/format_scratchpad/log.js', require: './agents/format_scratchpad/log.cjs' }, './agents/format_scratchpad/xml': { types: { import: './agents/format_scratchpad/xml.d.ts', default: './agents/format_scratchpad/xml.d.ts', require: './agents/format_scratchpad/xml.d.cts' }, import: './agents/format_scratchpad/xml.js', require: './agents/format_scratchpad/xml.cjs' }, './document_loaders/fs/directory': { types: { import: './document_loaders/fs/directory.d.ts', default: './document_loaders/fs/directory.d.ts', require: './document_loaders/fs/directory.d.cts' }, import: './document_loaders/fs/directory.js', require: './document_loaders/fs/directory.cjs' }, './experimental/openai_assistant': { types: { import: './experimental/openai_assistant.d.ts', default: './experimental/openai_assistant.d.ts', require: './experimental/openai_assistant.d.cts' }, import: './experimental/openai_assistant.js', require: './experimental/openai_assistant.cjs' }, './experimental/plan_and_execute': { types: { import: './experimental/plan_and_execute.d.ts', default: './experimental/plan_and_execute.d.ts', require: './experimental/plan_and_execute.d.cts' }, import: './experimental/plan_and_execute.js', require: './experimental/plan_and_execute.cjs' }, './chains/history_aware_retriever': { types: { import: './chains/history_aware_retriever.d.ts', default: './chains/history_aware_retriever.d.ts', require: './chains/history_aware_retriever.d.cts' }, import: './chains/history_aware_retriever.js', require: './chains/history_aware_retriever.cjs' }, './document_loaders/fs/multi_file': { types: { import: './document_loaders/fs/multi_file.d.ts', default: './document_loaders/fs/multi_file.d.ts', require: './document_loaders/fs/multi_file.d.cts' }, import: './document_loaders/fs/multi_file.js', require: './document_loaders/fs/multi_file.cjs' }, './experimental/generative_agents': { types: { import: './experimental/generative_agents.d.ts', default: './experimental/generative_agents.d.ts', require: './experimental/generative_agents.d.cts' }, import: './experimental/generative_agents.js', require: './experimental/generative_agents.cjs' }, './chains/combine_documents/reduce': { types: { import: './chains/combine_documents/reduce.d.ts', default: './chains/combine_documents/reduce.d.ts', require: './chains/combine_documents/reduce.d.cts' }, import: './chains/combine_documents/reduce.js', require: './chains/combine_documents/reduce.cjs' }, './experimental/prompts/handlebars': { types: { import: './experimental/prompts/handlebars.d.ts', default: './experimental/prompts/handlebars.d.ts', require: './experimental/prompts/handlebars.d.cts' }, import: './experimental/prompts/handlebars.js', require: './experimental/prompts/handlebars.cjs' }, './retrievers/document_compressors': { types: { import: './retrievers/document_compressors.d.ts', default: './retrievers/document_compressors.d.ts', require: './retrievers/document_compressors.d.cts' }, import: './retrievers/document_compressors.js', require: './retrievers/document_compressors.cjs' }, './retrievers/matryoshka_retriever': { types: { import: './retrievers/matryoshka_retriever.d.ts', default: './retrievers/matryoshka_retriever.d.ts', require: './retrievers/matryoshka_retriever.d.cts' }, import: './retrievers/matryoshka_retriever.js', require: './retrievers/matryoshka_retriever.cjs' }, './retrievers/self_query/functional': { types: { import: './retrievers/self_query/functional.d.ts', default: './retrievers/self_query/functional.d.ts', require: './retrievers/self_query/functional.d.cts' }, import: './retrievers/self_query/functional.js', require: './retrievers/self_query/functional.cjs' }, './retrievers/contextual_compression': { types: { import: './retrievers/contextual_compression.d.ts', default: './retrievers/contextual_compression.d.ts', require: './retrievers/contextual_compression.d.cts' }, import: './retrievers/contextual_compression.js', require: './retrievers/contextual_compression.cjs' }, './experimental/prompts/custom_format': { types: { import: './experimental/prompts/custom_format.d.ts', default: './experimental/prompts/custom_format.d.ts', require: './experimental/prompts/custom_format.d.cts' }, import: './experimental/prompts/custom_format.js', require: './experimental/prompts/custom_format.cjs' }, './agents/format_scratchpad/openai_tools': { types: { import: './agents/format_scratchpad/openai_tools.d.ts', default: './agents/format_scratchpad/openai_tools.d.ts', require: './agents/format_scratchpad/openai_tools.d.cts' }, import: './agents/format_scratchpad/openai_tools.js', require: './agents/format_scratchpad/openai_tools.cjs' }, './document_transformers/openai_functions': { types: { import: './document_transformers/openai_functions.d.ts', default: './document_transformers/openai_functions.d.ts', require: './document_transformers/openai_functions.d.cts' }, import: './document_transformers/openai_functions.js', require: './document_transformers/openai_functions.cjs' }, './agents/format_scratchpad/log_to_message': { types: { import: './agents/format_scratchpad/log_to_message.d.ts', default: './agents/format_scratchpad/log_to_message.d.ts', require: './agents/format_scratchpad/log_to_message.d.cts' }, import: './agents/format_scratchpad/log_to_message.js', require: './agents/format_scratchpad/log_to_message.cjs' }, './experimental/chains/violation_of_expectations': { types: { import: './experimental/chains/violation_of_expectations.d.ts', default: './experimental/chains/violation_of_expectations.d.ts', require: './experimental/chains/violation_of_expectations.d.cts' }, import: './experimental/chains/violation_of_expectations.js', require: './experimental/chains/violation_of_expectations.cjs' }, './retrievers/document_compressors/chain_extract': { types: { import: './retrievers/document_compressors/chain_extract.d.ts', default: './retrievers/document_compressors/chain_extract.d.ts', require: './retrievers/document_compressors/chain_extract.d.cts' }, import: './retrievers/document_compressors/chain_extract.js', require: './retrievers/document_compressors/chain_extract.cjs' }, './retrievers/document_compressors/embeddings_filter': { types: { import: './retrievers/document_compressors/embeddings_filter.d.ts', default: './retrievers/document_compressors/embeddings_filter.d.ts', require: './retrievers/document_compressors/embeddings_filter.d.cts' }, import: './retrievers/document_compressors/embeddings_filter.js', require: './retrievers/document_compressors/embeddings_filter.cjs' } }, gitHead: '67574efc941f455d6f08693cd78f827a6bce7525', scripts: { lint: 'yarn lint:eslint && yarn lint:dpdm', test: 'NODE_OPTIONS=--experimental-vm-modules jest --testPathIgnorePatterns=\\.int\\.test.ts --testTimeout 30000 --maxWorkers=50%', build: 'yarn turbo:command build:internal --filter=langchain', clean: 'rm -rf .turbo dist/', format: 'prettier --config .prettierrc --write "src"', prepack: 'yarn build', release: 'release-it --only-version --config .release-it.json', 'lint:fix': 'yarn lint:eslint --fix && yarn lint:dpdm', 'lint:dpdm': 'dpdm --exit-code circular:1 --no-warning --no-tree src/*.ts src/**/*.ts', precommit: 'lint-staged', 'test:watch': 'NODE_OPTIONS=--experimental-vm-modules jest --watch --testPathIgnorePatterns=\\.int\\.test.ts', 'lint:eslint': 'NODE_OPTIONS=--max-old-space-size=4096 eslint --cache --ext .ts,.js src/', 'test:single': 'NODE_OPTIONS=--experimental-vm-modules yarn run jest --config jest.config.cjs --testTimeout 100000', 'format:check': 'prettier --config .prettierrc --check "src"', 'build:internal': 'yarn lc_build --create-entrypoints --pre --tree-shaking --gen-maps', 'test:integration': 'NODE_OPTIONS=--experimental-vm-modules jest --testPathPattern=\\.int\\.test.ts --testTimeout 100000 --maxWorkers=50%' }, directories: {}, dependencies: { zod: '^3.22.4', uuid: '^10.0.0', yaml: '^2.2.1', 'js-yaml': '^4.1.0', 'p-retry': '4', langsmith: '^0.1.56-rc.1', 'js-tiktoken': '^1.0.12', jsonpointer: '^5.0.1', 'openapi-types': '^12.1.3', '@langchain/openai': '>=0.1.0 <0.4.0', 'zod-to-json-schema': '^3.22.3', '@langchain/textsplitters': '>=0.0.0 <0.2.0' }, publishConfig: { access: 'public' }, devDependencies: { dpdm: '^3.12.0', jest: '^29.5.0', axios: '^0.26.0', peggy: '^3.0.2', dotenv: '^16.0.3', eslint: '^8.33.0', openai: '^4.41.1', rimraf: '^5.0.1', rollup: '^3.19.1', cheerio: '1.0.0-rc.12', 'ts-jest': '^29.1.0', typeorm: '^0.3.20', prettier: '^2.8.3', '@swc/core': '^1.3.90', '@swc/jest': '^0.2.29', '@types/ws': '^8', wikipedia: '^2.1.2', handlebars: '^4.7.8', 'release-it': '^17.6.0', typescript: '~5.1.6', '@types/uuid': '^9', '@types/jsdom': '^21.1.1', '@jest/globals': '^29.5.0', '@langchain/aws': '*', '@types/js-yaml': '^4', '@faker-js/faker': '^7.6.0', '@langchain/core': 'workspace:*', '@langchain/groq': '*', '@langchain/cohere': '*', '@langchain/ollama': '*', '@types/handlebars': '^4.1.0', '@langchain/scripts': '>=0.1.0 <0.2.0', 'eslint-plugin-jest': '^27.6.0', '@types/html-to-text': '^9', '@langchain/anthropic': '*', '@langchain/mistralai': '*', 'eslint-plugin-import': '^2.27.5', '@tsconfig/recommended': '^1.0.2', 'jest-environment-node': '^29.6.4', 'eslint-config-prettier': '^8.6.0', 'eslint-plugin-prettier': '^4.2.1', '@langchain/google-genai': '*', '@typescript-eslint/parser': '^5.58.0', 'eslint-config-airbnb-base': '^15.0.0', '@langchain/google-vertexai': '*', 'eslint-plugin-no-instanceof': '^1.0.1', '@typescript-eslint/eslint-plugin': '^5.58.0' }, peerDependencies: { axios: '*', peggy: '^3.0.2', cheerio: '*', typeorm: '*', handlebars: '^4.7.8', '@langchain/aws': '*', '@langchain/core': '>=0.2.21 <0.4.0', '@langchain/groq': '*', '@langchain/cohere': '*', '@langchain/ollama': '*', '@langchain/anthropic': '*', '@langchain/mistralai': '*', '@langchain/google-genai': '*', '@langchain/google-vertexai': '*' }, peerDependenciesMeta: { axios: { optional: true }, peggy: { optional: true }, cheerio: { optional: true }, typeorm: { optional: true }, handlebars: { optional: true }, '@langchain/aws': { optional: true }, '@langchain/groq': { optional: true }, '@langchain/cohere': { optional: true }, '@langchain/ollama': { optional: true }, '@langchain/anthropic': { optional: true }, '@langchain/mistralai': { optional: true }, '@langchain/google-genai': { optional: true }, '@langchain/google-vertexai': { optional: true } } } Done in 1.05s. ```
node -v
v20.14.0
yarn -v
1.22.22
npm -v
10.7.0

package.json:

{
  "name": "something",
  "version": "0.1.0",
  "private": true,
  "dependencies": {
    "@langchain/cohere": "^0.3.0",
    "@langchain/core": "^0.3.3",
    "@testing-library/jest-dom": "^5.17.0",
    "@testing-library/react": "^13.4.0",
    "@testing-library/user-event": "^13.5.0",
    "react": "^18.3.1",
    "react-dom": "^18.3.1",
    "react-scripts": "5.0.1",
    "web-vitals": "^2.1.4"
  },
  "scripts": {
    "start": "react-scripts start",
    "build": "react-scripts build",
    "test": "react-scripts test",
    "eject": "react-scripts eject"
  },
  "eslintConfig": {
    "extends": [
      "react-app",
      "react-app/jest"
    ]
  },
  "browserslist": {
    "production": [
      ">0.2%",
      "not dead",
      "not op_mini all"
    ],
    "development": [
      "last 1 chrome version",
      "last 1 firefox version",
      "last 1 safari version"
    ]
  }
}
dosubot[bot] commented 1 day ago

Hello @pratham-jaiswal 👋, I'm Dosu, here to help you with any bugs, questions, or contributions.

The error you're encountering, Uncaught SyntaxError: Invalid left-hand side in assignment, typically occurs when there is an issue with the way the code is being bundled or transpiled. This can sometimes happen due to version conflicts or misconfigurations in your build tools like Webpack or Babel.

Here are a few steps to troubleshoot and resolve this issue:

  1. Check Dependencies and Peer Dependencies: Ensure that the versions of @langchain/cohere and @langchain/core are compatible. According to the @langchain/cohere package, it requires @langchain/core version >=0.2.21 <0.4.0 [1].

  2. Update package.json: Make sure your package.json enforces the same version of @langchain/core across all LangChain packages. You can do this by adding resolutions and overrides fields:

    {
     "name": "something",
     "version": "0.1.0",
     "private": true,
     "dependencies": {
       "@langchain/cohere": "^0.3.0",
       "@langchain/core": "^0.3.3",
       "@testing-library/jest-dom": "^5.17.0",
       "@testing-library/react": "^13.4.0",
       "@testing-library/user-event": "^13.5.0",
       "react": "^18.3.1",
       "react-dom": "^18.3.1",
       "react-scripts": "5.0.1",
       "web-vitals": "^2.1.4"
     },
     "resolutions": {
       "@langchain/core": "0.3.3"
     },
     "overrides": {
       "@langchain/core": "0.3.3"
     },
     "pnpm": {
       "overrides": {
         "@langchain/core": "0.3.3"
       }
     },
     "scripts": {
       "start": "react-scripts start",
       "build": "react-scripts build",
       "test": "react-scripts test",
       "eject": "react-scripts eject"
     },
     "eslintConfig": {
       "extends": [
         "react-app",
         "react-app/jest"
       ]
     },
     "browserslist": {
       "production": [
         ">0.2%",
         "not dead",
         "not op_mini all"
       ],
       "development": [
         "last 1 chrome version",
         "last 1 firefox version",
         "last 1 safari version"
       ]
     }
    }
  3. Clear Cache and Reinstall Dependencies: Sometimes, clearing the cache and reinstalling dependencies can resolve bundling issues.

    rm -rf node_modules
    rm -rf yarn.lock package-lock.json
    yarn cache clean
    yarn install
  4. Check Webpack Configuration: Ensure that your Webpack configuration is correctly set up to handle ES modules. You might need to adjust the module rules to include the @langchain packages.

  5. Babel Configuration: If you are using Babel, ensure that it is configured to transpile the @langchain packages correctly. You might need to include these packages in the include or exclude options of your Babel loader.

  6. Example Code: Here is a minimal example of how to use ChatCohere in a React application:

    import React from "react";
    import { ChatCohere } from "@langchain/cohere";
    
    const App = () => {
     const llm = new ChatCohere({
       model: "command-r-plus",
       temperature: 0,
       maxRetries: 2,
     });
    
     return (
       <div>
         <h1>hi</h1>
       </div>
     );
    };
    
    export default App;

By following these steps, you should be able to resolve the issue and successfully import and use ChatCohere in your React application.

To continue talking to Dosu, mention @dosu.