Detect Click into Iframe using JavaScript

Question

I understand that it is not possible to tell what the user is doing inside an iframe if it is cross domain. What I would like to do is track if the user clicked at all in the iframe. I imagine a scenario where there is an invisible div on top of the iframe and the the div will just then pass the click event to the iframe.

Is something like this possible? If it is, then how would I go about it? The iframes are ads, so I have no control over the tags that are used.

Answer 1

This is certainly possible. This works in Chrome, Firefox, and IE 11 (and probably others).

const message = document.getElementById("message");

// main document must be focused in order for window blur to fire when the iframe is interacted with. 
// There's still an issue that if user interacts outside of the page and then click iframe first without clicking page, the following logic won't run. But since the OP is only concerned about first click this shouldn't be a problem.
window.focus()

window.addEventListener("blur", () => {
  setTimeout(() => {
    if (document.activeElement.tagName === "IFRAME") {
      message.textContent = "clicked " + Date.now();
      console.log("clicked");
    }
  });
}, { once: true });

<div id="message"></div>
<iframe width="50%" height="300" src="//example.com"></iframe>

Caveat: This only detects the first click. As I understand, that is all you want.

Answer 2

This is small solution that works in all browsers even IE8:

var monitor = setInterval(function(){
    var elem = document.activeElement;
    if(elem && elem.tagName == 'IFRAME'){
        clearInterval(monitor);
        alert('clicked!');
    }
}, 100);

You can test it here: http://jsfiddle.net/oqjgzsm0/

Answer 3

Based on Mohammed Radwan's answer I came up with the following jQuery solution. Basically what it does is keep track of what iFrame people are hovering. Then if the window blurs that most likely means the user clicked the iframe banner.

the iframe should be put in a div with an id, to make sure you know which iframe the user clicked on:

<div class='banner' bannerid='yyy'>
    <iframe src='http://somedomain.com/whatever.html'></iframe>
<div>

so:

$(document).ready( function() {
    var overiFrame = -1;
    $('iframe').hover( function() {
        overiFrame = $(this).closest('.banner').attr('bannerid');
    }, function() {
        overiFrame = -1
    });

... this keeps overiFrame at -1 when no iFrames are hovered, or the 'bannerid' set in the wrapping div when an iframe is hovered. All you have to do is check if 'overiFrame' is set when the window blurs, like so: ...

    $(window).blur( function() {
        if( overiFrame != -1 )
            $.post('log.php', {id:overiFrame}); /* example, do your stats here */
    });
});

Very elegant solution with a minor downside: if a user presses ALT-F4 when hovering the mouse over an iFrame it will log it as a click. This only happened in FireFox though, IE, Chrome and Safari didn't register it.

Thanks again Mohammed, very useful solution!

Answer 4

Is something like this possible?

No. All you can do is detect the mouse going into the iframe, and potentially (though not reliably) when it comes back out (ie. trying to work out the difference between the pointer passing over the ad on its way somewhere else versus lingering on the ad).

I imagine a scenario where there is an invisible div on top of the iframe and the the div will just then pass the click event to the iframe.

Nope, there is no way to fake a click event.

By catching the mousedown you'd prevent the original click from getting to the iframe. If you could determine when the mouse button was about to be pressed you could try to get the invisible div out of the way so that the click would go through... but there is also no event that fires just before a mousedown.

You could try to guess, for example by looking to see if the pointer has come to rest, guessing a click might be about to come. But it's totally unreliable, and if you fail you've just lost yourself a click-through.

Answer 5

The following code will show you if the user click/hover or move out of the iframe:-

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Detect IFrame Clicks</title>
<script type="text/javascript">
    $(document).ready(function() {
        var isOverIFrame = false;

        function processMouseOut() {
            log("IFrame mouse >> OUT << detected.");
            isOverIFrame = false;
            top.focus();
        }

        function processMouseOver() {
            log("IFrame mouse >> OVER << detected.");
            isOverIFrame = true;
        }

        function processIFrameClick() {
            if(isOverIFrame) {
                // replace with your function
                log("IFrame >> CLICK << detected. ");
            }
        }

        function log(message) {
            var console = document.getElementById("console");
            var text = console.value;
            text = text + message + "\n";
            console.value = text;
        }

        function attachOnloadEvent(func, obj) {
            if(typeof window.addEventListener != 'undefined') {
                window.addEventListener('load', func, false);
            } else if (typeof document.addEventListener != 'undefined') {
                document.addEventListener('load', func, false);
            } else if (typeof window.attachEvent != 'undefined') {
                window.attachEvent('onload', func);
            } else {
                if (typeof window.onload == 'function') {
                    var oldonload = onload;
                    window.onload = function() {
                        oldonload();
                        func();
                    };
                } else {
                    window.onload = func;
                }
            }
        }

        function init() {
            var element = document.getElementsByTagName("iframe");
            for (var i=0; i<element.length; i++) {
                element[i].onmouseover = processMouseOver;
                element[i].onmouseout = processMouseOut;
            }
            if (typeof window.attachEvent != 'undefined') {
                top.attachEvent('onblur', processIFrameClick);
            }
            else if (typeof window.addEventListener != 'undefined') {
                top.addEventListener('blur', processIFrameClick, false);
            }
        }

        attachOnloadEvent(init);
    });
</script>
</head>
<body>
<iframe src="www.google.com" width="100%" height="1300px"></iframe>
<br></br>
<br></br>
<form name="form" id="form" action=""><textarea name="console"
id="console" style="width: 100%; height: 300px;" cols="" rows=""></textarea>
<button name="clear" id="clear" type="reset">Clear</button>
</form>
</body>
</html>

You need to replace the src in the iframe with your own link. Hope this'll help. Regards, Mo.

Answer 6

Just found this solution... I tried it, I loved it..

Works for cross domain iframes for desktop and mobile!

Don't know if it is foolproof yet

window.focus();
window.addEventListener('blur',function(){
      if(document.activeElement.id == 'CrossDomainiframeId'){
        //do something :-)
      }
});

Happy coding

Answer 7

see http://jsfiddle.net/Lcy797h2/ for my long winded solution that doesn't work reliably in IE

        $(window).on('blur',function(e) {    
            if($(this).data('mouseIn') != 'yes')return;
            $('iframe').filter(function(){
                return $(this).data('mouseIn') == 'yes';
            }).trigger('iframeclick');    
        });

        $(window).mouseenter(function(){
            $(this).data('mouseIn', 'yes');
        }).mouseleave(function(){
            $(this).data('mouseIn', 'no');
        });

        $('iframe').mouseenter(function(){
            $(this).data('mouseIn', 'yes');
            $(window).data('mouseIn', 'yes');
        }).mouseleave(function(){
            $(this).data('mouseIn', null);
        });

        $('iframe').on('iframeclick', function(){
            console.log('Clicked inside iframe');
            $('#result').text('Clicked inside iframe'); 
        });
        $(window).on('click', function(){
            console.log('Clicked inside window');
            $('#result').text('Clicked inside window'); 
        }).blur(function(){
            console.log('window blur');
        });

        $('<input type="text" style="position:absolute;opacity:0;height:0px;width:0px;"/>').appendTo(document.body).blur(function(){
                $(window).trigger('blur');
            }).focus();

Answer 8

You can achieve this by using the blur event on window element.

Here is a jQuery plugin for tracking click on iframes (it will fire a custom callback function when an iframe is clicked) : https://github.com/finalclap/iframeTracker-jquery

Use it like this :

jQuery(document).ready(function($){
    $('.iframe_wrap iframe').iframeTracker({
        blurCallback: function(){
            // Do something when iframe is clicked (like firing an XHR request)
        }
    });
});

Answer 9

http://jsfiddle.net/QcAee/406/

Just make a invisible layer over the iframe that go back when click and go up when mouseleave event will be fired !!
Need jQuery

this solution don't propagate first click inside iframe!

$("#invisible_layer").on("click",function(){
  alert("click");
  $("#invisible_layer").css("z-index",-11);

});
$("iframe").on("mouseleave",function(){
  $("#invisible_layer").css("z-index",11);
});

iframe {
    width: 500px;
    height: 300px;
}
#invisible_layer{
  position: absolute;
  background-color:trasparent;
  width: 500px;
  height:300px;
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div id="message"></div>
<div id="invisible_layer">

</div>
<iframe id="iframe" src="//example.com"></iframe>

Answer 10

This works for me on all browsers (included Firefox)

https://gist.github.com/jaydson/1780598

https://jsfiddle.net/sidanmor/v6m9exsw/

var myConfObj = {
  iframeMouseOver : false
}
window.addEventListener('blur',function(){
  if(myConfObj.iframeMouseOver){
    console.log('Wow! Iframe Click!');
  }
});

document.getElementById('idanmorblog').addEventListener('mouseover',function(){
   myConfObj.iframeMouseOver = true;
});
document.getElementById('idanmorblog').addEventListener('mouseout',function(){
    myConfObj.iframeMouseOver = false;
});

<iframe id="idanmorblog" src="https://sidanmor.com/" style="width:400px;height:600px" ></iframe>

<iframe id="idanmorblog" src="https://sidanmor.com/" style="width:400px;height:600px" ></iframe>

Answer 11

Combining above answer with ability to click again and again without clicking outside iframe.

    var eventListener = window.addEventListener('blur', function() {
    if (document.activeElement === document.getElementById('contentIFrame')) {
        toFunction(); //function you want to call on click
        setTimeout(function(){ window.focus(); }, 0);
    }
    window.removeEventListener('blur', eventListener );
    });

Answer 12

You can do this to bubble events to parent document:

$('iframe').load(function() {
    var eventlist = 'click dblclick \
                    blur focus focusin focusout \
                    keydown keypress keyup \
                    mousedown mouseenter mouseleave mousemove mouseover mouseout mouseup mousemove \
                    touchstart touchend touchcancel touchleave touchmove';

    var iframe = $('iframe').contents().find('html');

    // Bubble events to parent
    iframe.on(eventlist, function(event) {
        $('html').trigger(event);
    });
});

Just extend the eventlist for more events.

Answer 13

I ran into a situation where I had to track clicks on a social media button pulled in through an iframe. A new window would be opened when the button was clicked. Here was my solution:

var iframeClick = function () {
    var isOverIframe = false,
    windowLostBlur = function () {
        if (isOverIframe === true) {
            // DO STUFF
            isOverIframe = false;
        }
    };
    jQuery(window).focus();
    jQuery('#iframe').mouseenter(function(){
        isOverIframe = true;
        console.log(isOverIframe);
    });
    jQuery('#iframe').mouseleave(function(){
        isOverIframe = false;
        console.log(isOverIframe);
    });
    jQuery(window).blur(function () {
        windowLostBlur();
    });
};
iframeClick();

Answer 14

Mohammed Radwan, Your solution is elegant. To detect iframe clicks in Firefox and IE, you can use a simple method with document.activeElement and a timer, however... I have searched all over the interwebs for a method to detect clicks on an iframe in Chrome and Safari. At the brink of giving up, I find your answer. Thank you, sir!

Some tips: I have found your solution to be more reliable when calling the init() function directly, rather than through attachOnloadEvent(). Of course to do that, you must call init() only after the iframe html. So it would look something like:

<script>
var isOverIFrame = false;
function processMouseOut() {
    isOverIFrame = false;
    top.focus();
}
function processMouseOver() { isOverIFrame = true; }
function processIFrameClick() {
    if(isOverIFrame) {
    //was clicked
    }
}

function init() {
    var element = document.getElementsByTagName("iframe");
    for (var i=0; i<element.length; i++) {
        element[i].onmouseover = processMouseOver;
        element[i].onmouseout = processMouseOut;
    }
    if (typeof window.attachEvent != 'undefined') {
        top.attachEvent('onblur', processIFrameClick);
    }
    else if (typeof window.addEventListener != 'undefined') {
        top.addEventListener('blur', processIFrameClick, false);
    }
}
</script>

<iframe src="http://google.com"></iframe>

<script>init();</script>

Answer 15

This definitely works if the iframe is from the same domain as your parent site. I have not tested it for cross-domain sites.

$(window.frames['YouriFrameId']).click(function(event){  /* do something here  */ });
$(window.frames['YouriFrameId']).mousedown(function(event){ /* do something here */ });
$(window.frames['YouriFrameId']).mouseup(function(event){ /* do something here */ });

Without jQuery you could try something like this, but again I have not tried this.

window.frames['YouriFrameId'].onmousedown = function() { do something here }

You can even filter your results:

$(window.frames['YouriFrameId']).mousedown(function(event){   
  var eventId = $(event.target).attr('id');      
  if (eventId == 'the-id-you-want') {
   //  do something
  }
});

Answer 16

We can catch all the clicks. The idea is to reset focus on an element outside the iFrame after each click:

    <input type="text" style="position:fixed;top:-1000px;left:-1000px">
    <div id="message"></div>
    <iframe id="iframe" src="//example.com"></iframe>
    <script>
        focus();
        addEventListener('blur', function() {
            if(document.activeElement = document.getElementById('iframe')) {
                message.innerHTML += 'Clicked';
                setTimeout(function () {
                    document.querySelector("input").focus();
                    message.innerHTML += ' - Reset focus,';
                }, 1000);
            }  
        });
    </script>

JSFiddle

Answer 17

Assumptions -

1. Your script runs outside the iframe BUT NOT in the outermost window.top window. (For outermost window, other blur solutions are good enough)
2. A new page is opened replacing the current page / a new page in a new tab and control is switched to new tab.

This works for both sourceful and sourceless iframes

var ifr = document.getElementById("my-iframe");
var isMouseIn;
ifr.addEventListener('mouseenter', () => {
    isMouseIn = true;
});
ifr.addEventListener('mouseleave', () => {
    isMouseIn = false;
});
window.document.addEventListener("visibilitychange", () => {
    if (isMouseIn && document.hidden) {
        console.log("Click Recorded By Visibility Change");
    }
});
window.addEventListener("beforeunload", (event) => {
    if (isMouseIn) {
        console.log("Click Recorded By Before Unload");
    }
});

If a new tab is opened / same page unloads and the mouse pointer is within the Iframe, a click is considered

Answer 18

As found there : Detect Click into Iframe using JavaScript

=> We can use iframeTracker-jquery :

$('.carousel-inner .item').each(function(e) {
    var item = this;
    var iFrame = $(item).find('iframe');
    if (iFrame.length > 0) {
        iFrame.iframeTracker({
            blurCallback: function(){
                // Do something when iFrame is clicked (like firing an XHR request)
                onItemClick.bind(item)(); // calling regular click with right context
                console.log('IFrameClick => OK');
            }
        });
        console.log('IFrameTrackingRegistred => OK');
    }
})

Answer 19

Based in the answer of Paul Draper, I created a solution that work continuously when you have Iframes that open other tab in the browser. When you return the page continue to be active to detect the click over the framework, this is a very common situation:

          focus();
        $(window).blur(() => {
           let frame = document.activeElement;
           if (document.activeElement.tagName == "IFRAME") {
             // Do you action.. here  frame has the iframe clicked
              let frameid = frame.getAttribute('id')
              let frameurl = (frame.getAttribute('src'));
           }            
        });

        document.addEventListener("visibilitychange", function () {
            if (document.hidden) {

            } else {
                focus();
            }
        });

The Code is simple, the blur event detect the lost of focus when the iframe is clicked, and test if the active element is the iframe (if you have several iframe you can know who was selected) this situation is frequently when you have publicity frames.

The second event trigger a focus method when you return to the page. it is used the visibility change event.

Answer 20

Here is solution using suggested approaches with hover+blur and active element tricks, not any libraries, just pure js. Works fine for FF/Chrome. Mostly approache is same as @Mohammed Radwan proposed, except that I use different method proposed by @zone117x to track iframe click for FF, because window.focus is not working without addition user settings:

Makes a request to bring the window to the front. It may fail due to user settings and the window isn't guaranteed to be frontmost before this method returns.

Here is compound method:

function () {
    const state = {};

    (function (setup) {
        if (typeof window.addEventListener !== 'undefined') {
            window.addEventListener('load', setup, false);
        } else if (typeof document.addEventListener !== 'undefined') {
            document.addEventListener('load', setup, false);
        } else if (typeof window.attachEvent !== 'undefined') {
            window.attachEvent('onload', setup);
        } else {
            if (typeof window.onload === 'function') {
                const oldonload = onload;
                window.onload = function () {
                    oldonload();
                    setup();
                };
            } else {
                window.onload = setup;
            }
        }
    })(function () {
        state.isOverIFrame = false;
        state.firstBlur = false;
        state.hasFocusAcquired = false;

        findIFramesAndBindListeners();

        document.body.addEventListener('click', onClick);

        if (typeof window.attachEvent !== 'undefined') {
            top.attachEvent('onblur', function () {
                state.firstBlur = true;
                state.hasFocusAcquired = false;
                onIFrameClick()
            });
            top.attachEvent('onfocus', function () {
                state.hasFocusAcquired = true;
                console.log('attachEvent.focus');
            });
        } else if (typeof window.addEventListener !== 'undefined') {
            top.addEventListener('blur', function () {
                state.firstBlur = true;
                state.hasFocusAcquired = false;
                onIFrameClick();
            }, false);
            top.addEventListener('focus', function () {
                state.hasFocusAcquired = true;
                console.log('addEventListener.focus');
            });
        }

        setInterval(findIFramesAndBindListeners, 500);
    });

    function isFF() {
        return navigator.userAgent.search(/firefox/i) !== -1;
    }

    function isActiveElementChanged() {
        const prevActiveTag = document.activeElement.tagName.toUpperCase();
        document.activeElement.blur();
        const currActiveTag = document.activeElement.tagName.toUpperCase();
        return !prevActiveTag.includes('BODY') && currActiveTag.includes('BODY');
    }

    function onMouseOut() {
        if (!state.firstBlur && isFF() && isActiveElementChanged()) {
            console.log('firefox first click');
            onClick();
        } else {
            document.activeElement.blur();
            top.focus();
        }
        state.isOverIFrame = false;
        console.log(`onMouseOut`);
    }

    function onMouseOver() {
        state.isOverIFrame = true;
        console.log(`onMouseOver`);
    }

    function onIFrameClick() {
        console.log(`onIFrameClick`);
        if (state.isOverIFrame) {
            onClick();
        }
    }

    function onClick() {
        console.log(`onClick`);
    }

    function findIFramesAndBindListeners() {
        return Array.from(document.getElementsByTagName('iframe'))
            .forEach(function (element) {
                element.onmouseover = onMouseOver;
                element.onmouseout = onMouseOut;
            });
    }
}

Answer 21

A colleague and I, we have a problem similar to that of Brian Trumpsett and found this thread very helpful. Our kiosk has animations inside iframes and we need to track the page activity to set a timer.

As suggested here, rather than tracking the clicks, we now detect the focus change at each click and change it back The following code is Okay on macOS with Safari and Chrome but does not work with FireFox (why?):

var eventListener = window.addEventListener('blur', function() {
if (document.activeElement.classList && document.activeElement.classList[0] == 'contentiFrame') {
    refresh(); //function you want to call on click
            setTimeout(function(){ window.focus(); }, 1);
}
    window.removeEventListener('blur', eventListener );
});

The problem is that, on Windows, it works neither with Chrome nor with FireFox and thus, our kiosk is not functional. Do you know why it is not working ? Do you have a solution to make it work on Windows ?

Answer 22

My approach was similar to that proposed by Paul Draper above. However, it didn't work in Firefox because activeElement did not update in time for the code to execute. So we wait a little bit.

This will also fire if you tab into the iframe. For my use case, it's fine, but you could filter for that keypress.

addEventListenerOnIframe() {
    window.addEventListener('blur', this.onBlur);
}


onBlur = () => {
    setTimeout(() => {
        let activeElement = document.activeElement;
        let iframeElement = document.querySelector('iframe');
        if (activeElement === iframeElement) {
            
            //execute your code here

            //we only want to listen for the first time we click into the iframe
            window.removeEventListener('blur', this.onBlur);
        }
    }, 500);
};

Answer 23

I believe you can do something like:

$('iframe').contents().click(function(){function to record click here });

using jQuery to accomplish this.