Execute function before refresh

Question

On my HTML page, when the user clicks / presses F5 button the page refreshes, but before it refreshes I want to execute a function or a simple alert.

User can click on refresh button, press F5 or Ctrl + R.

Using core JavaScript, jQuery or YUI.

Eucalyptol

possible duplicate of Javascript function, on web page close – Encratia

Answer 1

    window.onbeforeunload = function(event)
    {
        return confirm("Confirm refresh");
    };

Odel

Well, for me this does not solve the problem described. It triggers the confirm box (with a predefined and probably browser specific text) on all events leaving the page. I.e., also on form-submission. There it is really irritating and not intended! Any thoughts? – Bird

Then you need to explain som more about whats specific about your problem... Show us some code (jsfiddle ?) and tell us what browser your using... – Odel

Chrome blocks it – Carducci

This in an outdated Solution. Confirm block will not work inside the onbeforeunload. chromestatus.com/features/5349061406228480 – Spode

Answer 2

$(window).bind('beforeunload', function(){
    return '>>>>>Before You Go<<<<<<<< \n Your custom message go here';
});

Source: http://www.mkyong.com/jquery/how-to-stop-a-page-from-exit-or-unload-with-jquery/

Demo: http://www.mkyong.com/wp-content/uploads/jQuery/jQuery-stop-page-from-exit.html

Impassable

Answer 3

$(window).bind("beforeunload", function(){
        return confirm("Do you really want to refresh?"); 
});

Teacher

Answer 4

the jQuery related event is:

$( window ).on('unload', function( event ) {
    console.log('Handler for `unload` called.');
});

Works great for me.

Dufrene

The question is for 'before' unload, this event will not work for that, read the docs: developer.mozilla.org/en-US/docs/Web/API/Window/unload_event – Contrary