Twilio function deployed with TypeScript cannot find module @twilio-labs/serverless-runtime-types

Question

I'm trying to migrate a Twilio functions repo to use TypeScript. I completely rewritten one of the functions via TypeScript and successfully tested it locally. However, after I deployed the function, it started returning 500 with the following error: "message": "Cannot find module '@twilio-labs/serverless-runtime-types'

I'm trying to find out how I can correctly import and use types.

Some context:

Mainly followed this guide: https://www.twilio.com/blog/twilio-functions-typescript
Deployed the repo via: twilio serverless:deploy --functions-folder build/src/functions --runtime node14 --override-existing-project

Before compiling to javascript my import statement looks like this:

import '@twilio-labs/serverless-runtime-types';
import * as VoiceResponse from '@twilio-labs/serverless-runtime- 
   types/node_modules/twilio/lib/twiml/VoiceResponse';
import { Context, ServerlessCallback, ServerlessFunctionSignature, TwilioClient } from 
  '@twilio-labs/serverless-runtime-types/types';

And after compiling the import statement looks like this:
```
require("@twilio-labs/serverless-runtime-types");
```

ege · Accepted Answer · 2022-08-10 17:39:56Z

2

I tried adding the type dependency @twilio-labs/serverless-runtime-types as production dependency rather than a dev dependency via npm.

npm i @twilio-labs/serverless-runtime-types -P

I deployed the function again after this change. Now, I'm not getting the 500 error and the function works as expected.

answered Aug 10, 2022 at 17:39

ege

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2 Comments

ege Over a year ago

Accepting this workaround as an answer until someone provides a better solution...

philnash Over a year ago

In the blog post you followed, the @twilio-labs/serverless-runtime-types were installed as a production dependency, not a dev dependency, so this is the answer.

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