How to add a button to the Bitrix model window?

Question

1C-Bitrix

There is a standard Bitrix modal window, I want to insert an additional one into it. a button that closes this window and brings up another, bootstrap one.
I found the code in the script, added the "1 click" button

if (this.config.showClosePopup)
          {
            popupButtons = [
              new BasketButton({
                text: BX.message('BTN_MESSAGE_BASKET_REDIRECT'),
                events: {
                  click: BX.delegate(this.basketRedirect, this)
                },
                style: {marginRight: '10px'}
              }),
              new BasketButton({
                text: BX.message('BTN_MESSAGE_CLOSE_POPUP'),
                events: {
                  click: BX.delegate(this.obPopupWin.close, this.obPopupWin)
                }
              }),
                            new BasketButton({
                                text: '1 клик',
                                events: {
                                    click: BX.delegate(this.obPopupWin.close, $('#oneclick').modal('show'))
                                }
                            })
            ];
          }

but what is it

click: BX.delegate(this.obPopupWin.close, $('#oneclick').modal('show'))

that the modal opens even when you click buy, i.e. Two windows open at once, instead of one and then another. Maybe I'm doing something wrong or in the wrong place? click: $('#oneclick').modal('show')

Answer 1

The most obvious option

click:  function() {
    $('#oneclick').modal('show')
}