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 clicke

Answer 1

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 2

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 3

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;
            });
    }
}