I want this kinda image for the following link
https://taskcluster-ui.herokuapp.com/worker-manager
You can use the native JS function confirm, which produces a dialogue box similar to the alert function. If ‘OK’ is pressed, it will return true. Otherwise it returns false. You can combine it with an if statement to get the behaviour you require. See https://www.w3schools.com/jsref/met_win_confirm.asp for more.
However, styling the dialogue box involves writing the confirm function from scratch according to https://stackoverflow.com/questions/7853130/how-to-change-the-style-of-alert-box. A better way to deal with this would be to use a library like SweetAlert https://sweetalert.js.org/.