i am trying to make it so that the code waits for a result

if(confirm("hi") {
   //true
} else {
   //false
}
function confirm(text){
          document.getElementById("confirm").style.visibility="visible"
          document.getElementById("confirmText").value = text
          yesconfirm.addEventListener("click", function(){
            document.getElementById("confirm").style.visibility="hidden"
            return true
          });
          noconfirm.addEventListener("click", function(){
            document.getElementById("confirm").style.visibility="hidden"
            return false
          });
        }

i do not know how to do this? and when i do the function it returns undefined