Call action on page load, but with action button hidden

Hi, i have $defaultAction property set on custom page. It is working ok. Default action is triggered on pageLoad.

But I would like to hide action button. If I set visible(false) action is not triggered.

What is the purpose:
When page loads, I show announcement in action modal, but only if user has unread announcement. Please, make a reply if youbdont understand me.

Solution

ok, fixed it. extraAttributes and display:none;