javascript - Is there a way to overwrite the refresh button action? - Stack Overflow

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I would like to use some kind of preventDefault function to overwrite what hitting the refresh button on the browser does (or also pressing CTRL/CMD+R).

Is there something that allows me to prevent refreshing the page?

I tried this but it doesn't seem to do anything in Firefox.

window.onunload = function(){
     alert("unload event detected!");
}

I would like to use some kind of preventDefault function to overwrite what hitting the refresh button on the browser does (or also pressing CTRL/CMD+R).

Is there something that allows me to prevent refreshing the page?

I tried this but it doesn't seem to do anything in Firefox.

window.onunload = function(){
     alert("unload event detected!");
}

• javascript
• http
• browser
• cross-browser
• reload

Share Improve this question Follow edited Jan 14, 2021 at 11:10 Erik Kaplun 38.3k1515 gold badges102102 silver badges113113 bronze badges asked May 29, 2013 at 5:36 Todd JenkTodd Jenk 31111 gold badge33 silver badges1313 bronze badges 2

• 1 maybe window.onunload = window.onbeforeunload = function(){ – Ohgodwhy Commented May 29, 2013 at 5:38
• this kind of works ... thanks – Todd Jenk Commented May 29, 2013 at 7:33

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1 Answer 1

Sorted by: Reset to default 8

You can use onbeforeunload to prompt whether they'd like to leave:

window.onbeforeunload = function() {
    return "Are you really sure?\nI don't know why anyone would want to leave my beautiful website!";
};

However, you can't override it any more than that.

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