No elegant solution came to mind.

There is a trick: if the user chooses to disable it, then when calling this method, the code will not be blocked and the next code will be executed immediately. We can set a timer. When the time expires at the millisecond level, it means that the client has blocked the pop-up window.

var begin = Date.now();

//如果客户端没有禁用confirm，那么这个弹窗会阻塞代码继续往下执行，直到用户点了确认或取消，
// 那么end与start之间的值就会比较大了。
//反之，end与start之间的值就非常小了，毫秒级。
var result = window.confirm('hello'); 

var end = Date.now();
if (end - begin < 10) {
    console.log('用户禁用了confirm弹窗');
}

No way of knowing.

It is recommended to write your own dialog box instead.

Never Use a Warning When you Mean Undo