Trelollo board button URL target

Trello
1

Hi,

How does the target tag work?

Is there a way to actually set it to something as _self , _parent etc;
Seems to be overridden by anchor URL

I have a board button URL that downloads a file and try to avoid opening a new tab while keeping user inside Trello board.

If I could set it to _parent this would work.

Example

      text: 'URL',
      condition: 'always',
      url: 'https://test.com/download/test.jpg',
      target: '_parent' // optional target for above url