Using the processBeforeResponse flag

[rosgoo]

Hi @seratch, I am building a slack app on cloud functions (for now... cold starts are annoying...) and I think I should be using the processBeforeResponse as outlined in slackapi/bolt-js#444 but having issues figuring out how to use it. Is it as easy as just adding the option to my App constructor? Do I need to move by ack() calls to the end of my handler functions or can I keep them at the beginning?

[seratch]

Thanks for flagging this! Yes, this example should be updated.

Is it as easy as just adding the option to my App constructor?

Yes, it is. If you initialize ExpressReceiver manually, you need to set the flag to both App and ExpressReceiver.

Do I need to move by ack() calls to the end of my handler functions or can I keep them at the beginning?

No, you don't. When you turn on the option, your app waits for the whole completion of a listener function before sending an HTTP response to Slack regardless of the position of ack() calls.

[rosgoo]

Thanks! that worked fine!

[seratch]

I've updated this example to be up-to-date. Let me close this issue now.