How to capture the browser window close event?

I want to capture the browser window/tab close event. I have tried the following with jQuery:

jQuery(window).bind(
    "beforeunload", 
    function() { 
        return confirm("Do you really want to close?") 
    }
)

But it works on form submission as well, which is not what I want. I want an event that triggers only when the user closes the window.

标签： javascript jquery events browser

17条回答

牵手、夕阳

2楼-- · 2018-12-31 02:59

Perhaps you could handle OnSubmit and set a flag that you later check in your OnBeforeUnload handler.

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时光乱了年华

3楼-- · 2018-12-31 03:02

My Issue: The 'onbeforeunload' event would only be triggered if there were odd number of submits(clicks). I had a combination of solutions from similar threads in SO to have my solution work. well my code will speak.

<!--The definition of event and initializing the trigger flag--->


$(document).ready(function() {
updatefgallowPrompt(true);
window.onbeforeunload = WarnUser;   
}

function WarnUser() {
var allowPrompt = getfgallowPrompt();
    if(allowPrompt) {
    saveIndexedDataAlert();
    return null;
    } else {
        updatefgallowPrompt(true);
        event.stopPropagation
    }
}

<!--The method responsible for deciding weather the unload event is triggered from submit or not--->
function saveIndexedDataAlert() {
    var allowPrompt = getfgallowPrompt();
    var lenIndexedDocs = parseInt($('#sortable3 > li').size()) + parseInt($('#sortable3 > ul').size());

    if(allowPrompt && $.trim(lenIndexedDocs) > 0) {
        event.returnValue = "Your message";
    } else {
        event.returnValue = "   ";
        updatefgallowPrompt(true);
    }
}

<!---Function responsible to reset the trigger flag---->
$(document).click(function(event) {  
$('a').live('click', function() { updatefgallowPrompt(false); });
 });

<!--getter and setter for the flag---->
function updatefgallowPrompt (allowPrompt){ //exit msg dfds
    $('body').data('allowPrompt', allowPrompt); 
}   

function getfgallowPrompt(){        
    return $('body').data('allowPrompt');   
}

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忆尘夕之涩

4楼-- · 2018-12-31 03:03

For a solution that worked well with third party controls like Telerik (ex.: RadComboBox) and DevExpress that use the Anchor tags for various reasons, consider using the following code, which is a slightly tweaked version of desm's code with a better selector for self targeting anchor tags:

var inFormOrLink;
$('a[href]:not([target]), a[href][target=_self]').live('click', function() { inFormOrLink = true; });
$('form').bind('submit', function() { inFormOrLink = true; });

$(window).bind('beforeunload', function(eventObject) {
    var returnValue = undefined;
    if (! inFormOrLink) {
        returnValue = "Do you really want to close?";
    }
    eventObject.returnValue = returnValue;
    return returnValue;
});

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无色无味的生活

5楼-- · 2018-12-31 03:03

My answer is aimed at providing simple benchmarks.

HOW TO

See @SLaks answer.

$(window).on("beforeunload", function() { 
    return inFormOrLink ? "Do you really want to close?" : null; 
})

How long does the browser take to finally shut your page down?

Whenever an user closes the page (x button or CTRL + W), the browser executes the given beforeunload code, but not indefinitely. The only exception is the confirmation box (return 'Do you really want to close?) which will wait until for the user's response.

Chrome: 2 seconds.
Firefox: ∞ (or double click, or force on close)
Edge: ∞ (or double click)
Explorer 11: 0 seconds.
Safari: TODO

What we used to test this out:

A Node.js Express server with requests log
The following short HTML file

What it does is to send as many requests as it can before the browser shut downs its page (synchronously).

<html>
<body>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.1.1/jquery.min.js"></script>
    <script>
    function request() {
        return $.ajax({
            type: "GET",
            url: "http://localhost:3030/" + Date.now(),
            async: true
        }).responseText;
    }
    window.onbeforeunload = () => {
        while (true) {
            request();
        }
        return null;
    }
    </script>
</body>
</html>

Chrome output:

GET /1480451321041 404 0.389 ms - 32  
GET /1480451321052 404 0.219 ms - 32  
...  
GET /hello/1480451322998 404 0.328 ms - 32

1957ms ≈ 2 seconds // we assume it's 2 seconds since requests can take few milliseconds to be sent.

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泪湿衣

6楼-- · 2018-12-31 03:03

As of jQuery 1.7, the .live() method is deprecated. Use .on() to attach event handlers. Users of older versions of jQuery should use .delegate() in preference to .live()

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

on complete or link

$(window).unbind();

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怪性笑人.

7楼-- · 2018-12-31 03:04

var validNavigation = false;
            jQuery(document).ready(function () {

                wireUpEvents();
            });

            function endSession() {
                // Browser or broswer tab is closed
                // Do sth here ...
                alert("bye");
            }

            function wireUpEvents() {
                /*
                * For a list of events that triggers onbeforeunload on IE
                * check http://msdn.microsoft.com/en-us/library/ms536907(VS.85).aspx
                */
                window.onbeforeunload = function () {
                    debugger
                    if (!validNavigation) {
                        endSession();
                    }
                }

                // Attach the event keypress to exclude the F5 refresh
                $(document).bind('keypress', function (e) {
                    debugger
                    if (e.keyCode == 116) {
                        validNavigation = true;
                    }
                });

                // Attach the event click for all links in the page
                $("a").bind("click", function () {
                    debugger
                    validNavigation = true;
                });

                // Attach the event submit for all forms in the page
                $("form").bind("submit", function () {
                    debugger
                    validNavigation = true;
                });

                // Attach the event click for all inputs in the page
                $("input[type=submit]").bind("click", function () {
                    debugger
                    validNavigation = true;
                });

            }`enter code here`

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