When Clicking the "Redirect" Button BackgroundCallCard::completeTransferButtonClick

Choose a tool for developing with an AI agent:

  • use Alaio Vibecode to build an app for Bitrix24 from a task description without knowing any programming language. The agent writes the code and deploys the app to a server, with no manual hosting setup
  • use the MCP server to develop a REST API integration in your own project. The agent refers to the official REST documentation

Scope: placement — registration of the placement, telephony — registration of the call that raises the card

Who can subscribe: any user

The BackgroundCallCard::completeTransferButtonClick event occurs when the operator clicks the "Redirect" button to complete the call transfer.

The button is available only in the transferring state. The application enables it with the CallCardSetUiState command after the transferButtonClick event, which passes the other party's number phoneNumber and the transfer recipient target. The second button of this state, "Continue call", sends cancelTransferButtonClick.

Bitrix24 does not complete the transfer of an application call itself: the application hands the call over to the recipient and changes the card state.

The event operates within the application context in the PAGE_BACKGROUND_WORKER placement. This is a JS interface event, not a REST event: you cannot subscribe to it with a request to /rest/.

What the Handler Receives

No data is passed to the event handler.

Event Subscription Parameters

The handler is registered from the widget with the BX24.placement.bindEvent method.

Required parameters are marked with *

Name
type

Description

event*
string

The name of the interface event.

For this event — BackgroundCallCard::completeTransferButtonClick

callback*
callable

The function Bitrix24 invokes when the event occurs. No arguments are passed to the handler

Code Examples

How to Use Examples in Documentation

BX24.ready(function () {
            BX24.init(function () {
                BX24.placement.bindEvent('BackgroundCallCard::completeTransferButtonClick', function () {
                    // handler code
                });
            });
        });
        
// $b24 is an already-initialized SDK instance (see the SDK "Get started" guide)
        import type { B24Frame } from '@bitrix24/b24jssdk'
        
        declare const $b24: B24Frame
        
        await $b24.placement.bindEvent('BackgroundCallCard::completeTransferButtonClick', () => {
          // handler code
        })
        
<!-- Load the SDK (UMD build); it is exposed as the global B24Js -->
        <script src="https://unpkg.com/@bitrix24/b24jssdk@1/dist/umd/index.min.js"></script>
        <script>
          document.addEventListener('DOMContentLoaded', async () => {
            const $b24 = await B24Js.initializeB24Frame()
        
            await $b24.placement.bindEvent('BackgroundCallCard::completeTransferButtonClick', () => {
              // handler code
            })
          })
        </script>

Errors

Check the following conditions.

  • The widget is open in the PAGE_BACKGROUND_WORKER placement. In other placements, the BackgroundCallCard::* events are not registered, and the subscription silently fails
  • The event name is passed without typos and with the correct capitalization. The list of events available in the current placement is returned by BX24.placement.getInterface
  • The call was raised by the application with the telephony.externalCall.register method. For calls made by Bitrix24 itself, the BackgroundCallCard::* events are not emitted at all

Continue Learning

Previous
When Clicking the "Continue Call" Button
Next
When Clicking the "End" Button