How to transfer transaction id from Bitrix24 crm embedded application?

Question

1C-Bitrix

I integrated my widget with the interface into CRM_DEAL_DETAIL_TAB .
The widget is written in JS

I don't know how to get the deal id .
$_REQUEST in JS is not readable, but BX24.placement.info()returns null.

I will be very grateful. I've been sitting with this for 4 days now. Turned over all the documentation)

Answer 1

It was necessary to make B24.init