[removed] - Only show warning when not submitting form [duplicate]

Answer 1

you could use .on() to bind onbeforeunload and then use .off() to unbind it in form submission

$(document).ready(function () {
    // Warning
    $(window).on('beforeunload', function(){
        return "Any changes will be lost";
    });

    // Form Submit
    $(document).on("submit", "form", function(event){
        // disable warning
        $(window).off('beforeunload');
    });
}