how can i prevent onbeforeunload from firing when a certain condition is met?

Question

i have a page on which i want to confirm if the user wants to leave. i have to confirm only when a certain condition is met so i wrote code like this

var bac         


        

Answer 1

You could also consider not setting the window.beforeunload event untill your list of conditions are met.

var confirmUserToLeave = function () {
    if (/* conditions are met */) {
        window.unbeforeunload = function (e) {
            /* whatever you want to do here */
        };
    } else {
        window.unbeforeunload = undefined;
    }
};

Then just call that method on certain events that might change the outcome of your 'conditions are met'.