Inheritance error with Slack Node SDK and NCC

[ataylorme]

Hello,
I'm updating dependencies in my project (yay!) but I'm having some issues with the Slack Node SDK and @vercel/ncc.

I am maintaining a serverless function that reacts to interactive Slack messages. I am using the Slack SDK in a TypeScript environment, compiling my code with ncc for deployment to AWS Lambda.

Updating ncc also updates static-eval, which throws a new error when running my compiled Lambda function.

Going through the change logs between the old and new versions I believe this was introduced in #27

The error I am seeing is Error: Attempt to inherit from WebClient methods without inheriting from WebClient

Here is how I am using the Slack SDK:

import {WebClient as SlackWebClient} from '@slack/web-api'
(async () => {
  // The slack token is fetched from SSM
  const {slackToken} = await getSecrets({environment})
  const slackClient = new SlackWebClient(slackToken)
  await slackClient.chat.postMessage({
    channel: channelID,
    thread_ts: messageID,
    text: `Some message text`,
  })
})

which aligns with their Posting a message with Web API documentation

If you can point me in the right direction on how to resolve this I would appreciate it.

[goto-bus-stop]

Looking at ncc's lockfile, static-eval is only installed through their pdfkit dependency, which is only installed for tests and not for end users. As such, I don't think this error can possibly be related to static-eval.

[ataylorme]

@goto-bus-stop thanks for the reply. I think you are correct -- I did some more debugging and compiling my code with TypeScript only (without ncc) does not throw this error.

The error comes from the Slack SDK: https://github.com/slackapi/node-slack-sdk/blob/main/packages/web-api/src/methods.ts#L37