Close expanded card by clicking into the background

When clicking into the background of an already expanded card I want it to be closed.

The following widget almost does what it should but additionally to closing the expanded card it runs the action which is assigned to the cell (in my example “0”).
Anybody knows what I need to do differently?

uid: my-cell
props:
  parameters:
    - label: comma-seperated commands
      name: vCmd
      required: false
      type: TEXT
component: oh-label-cell
config:
  label: Test
  actionItem: TestItem
  action: command
  actionCommand: 0
slots:
  default:
    - component: oh-button
      config:
        class:
          - card-close
        style:
          --f7-button-bg-color: transparent
          --f7-button-hover-bg-color: transparent
          --f7-button-pressed-bg-color: transparent
          height: 100%
          width: 100%
          position: absolute
          left: 0px
          top: 0px
    - component: oh-repeater
      config:
        sourceType: array
        for: btn
        in: =props.vCmds.split(",")
        fragment: true
      slots:
        default:
          - component: oh-button
            config:
              actionItem: TestItem
              outline: false
              class:
                - display-flex
                - flex-direction-column
              style:
                height: 70px
                width: 230px
                margin-top: 20px
                --f7-button-bg-color: white
                --f7-button-pressed-bg-color: gray
                color: black
                font-size: 20px
                font-weight: 400
                border-radius: var(--f7-card-expandable-border-radius)
                box-shadow: var(--f7-card-expandable-box-shadow)
                --f7-button-text-transform: none
              text: =loop.btn.split("=")[1]
              action: command
              actionCommand: =loop.btn.split("=")[0]

I saw this the other day but haven’t used it or even it would work.
closeByBackdropClick
https://www.rdocumentation.org/packages/shinyMobile/versions/0.8.0/topics/f7Popup

thanks, but backdrop is the area outside the popup.

noone has an idea how to close an expanded card when clicking into the background?