VAPI•2w ago

[URGENT] Broken React SDK

Trying to run the react sdk results in

Uncaught TypeError: _vapi_ai_web__WEBPACK_IMPORTED_MODULE_2__ is not a constructor

Uncaught TypeError: _vapi_ai_web__WEBPACK_IMPORTED_MODULE_2__ is not a constructor

Uncaught TypeError: _vapi_ai_web__WEBPACK_IMPORTED_MODULE_2__ is not a constructor

Uncaught TypeError: _vapi_ai_web__WEBPACK_IMPORTED_MODULE_2__ is not a constructor

Issue was created here
https://github.com/VapiAI/client-sdk-react/issues/35

There's a simple reproduction repo

GitHub

Uncaught TypeError · Issue #35 · VapiAI/client-sdk-react

Hi, We are getting the following error using this this library Uncaught TypeError: _vapi_ai_webWEBPACK_IMPORTED_MODULE_2 is not a constructor Here's a reproduction repo here: https://github...

VapiAPP•12/11/25, 11:11 AM

Hi Manny,

I reproduced this locally. The SDK works perfectly with Vite but fails with react-scriptsreact-scripts (Create React App).

Root Cause: Your project is using react-scriptsreact-scripts, which has known issues handling modern ESM exports. It incorrectly bundles the SDK import, causing the TypeError: ... is not a constructorTypeError: ... is not a constructor runtime error.

Fix: Since this is a test app, I strongly recommend initializing with Vite instead of CRA. It handles ESM natively and resolves this immediately.

Bash

npm create vite@latest my-vapi-app -- --template react

npm create vite@latest my-vapi-app -- --template react

Let me know if you hit any issues after switching bundlers.

Best,

Vikash

[URGENT] Broken React SDK

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