Using Typescript, filesUploadV2 requires deprecated 'channels' argument when 'thread_ts' is given

[rcfox]

Packages:

Select all that apply:

• @slack/web-api
• @slack/rtm-api
• @slack/webhooks
• @slack/oauth
• @slack/socket-mode
• @slack/types
• I don't know

Reproducible in:

The Slack SDK version

"slack/web-api": "^7.3.1",

Node.js runtime version

v21.6.2

Typescript version

"typescript": "5.4.5",

Steps to reproduce:

With the following code:

    const token = '...';
    const channelId = '...';

    const slack = new WebClient(token);

    const response = await slack.chat.postMessage({
      text: `hello`,
      channel: channelId,
    });

    await slack.filesUploadV2({
      channel_id: channelId,
      thread_ts: response.ts,
      content: 'test',
      filename: 'test.txt',
      title: 'test',
    });

I get the following Typescript compile error:

Property 'channels' is missing in type '{ channel_id: string; thread_ts: string; content: string; filename: string; title: string; }' but required in type 'FileThreadDestinationArgumentChannels'.

However, if I include the channels field, I get a warning at runtime:

[WARN] web-api:WebClient:0 Although the 'channels' parameter is still supported for smoother migration from legacy files.upload, we recommend using the new channel_id parameter with a single str value instead (e.g. 'C12345').

If the thread_ts argument is not included, then channels is not required.

[WilliamBergamin]

Hi @rcfox thanks for bringing this up 💯

I was able to reproduce this behavior with the following code

import { WebClient } from '@slack/web-api';

const client = new WebClient('mytoken');

(async () => {
  client.filesUploadV2({
    channels: 'C123',
    thread_ts: '1723.09',
    content: 'test',
    filename: 'slack.json',
    title: 'test',
  });
})();

[rcfox]

Amazing response time. Thanks!