I have created a custom confirm function which creates a bootstrap confirmation box.
There is a third party javascript library, which has an event if we return true in that event means the further process will run else return false will not run the execution.

If I use javascript confirm function it waits for user confirmation (Expected behaviour). see code below:

variable.attachEvent("onSomeEvent", function (e){
        let r = confirm("Do you want to proceed?");
        if(r){
            return true;
        }else{
            return false;
        }
    });

If I use my custom confirm it does not wait for user confirmation. see code below:

variable.attachEvent("onSomeEvent", function (e){
        customConfirm("Do you want to proceed?", callback(choice){
            return choice == "Yes";// I know this return is for callback function not of event.
        });
    });

I tried using async and await but didn’t work, might be I am doing something wrong.