confirm button in Javascript code example

Example 1: javascript confirm yes no

var proceed = confirm("Are you sure you want to proceed?");
if (proceed) {
  //proceed
} else {
  //don't proceed
}

Example 2: confirm javascript

if (window.confirm("Une nouvelle fenêtre va s'ouvrir.")) {
    window.open("fenetre.html", "Nouvelle fenêtre", "");
}