在 Chrome 中检测阻塞弹出窗口

我知道检测弹出窗口是否在其他浏览器中被阻塞的 javascript 技术(如 这个问题的答案所述)。下面是最基本的测试:

var newWin = window.open(url);


if(!newWin || newWin.closed || typeof newWin.closed=='undefined')
{
//POPUP BLOCKED
}

但是这在 Chrome 中不起作用。当弹出窗口被阻止时，“弹出窗口阻塞”部分永远不会被触及。

当然，这个测试在一定程度上是有效的，因为 Chrome 实际上并没有阻止弹出窗口，而是在右下角的一个小小的最小化窗口中打开它，其中列出了“阻止”弹出窗口。

我想要做的是能够告诉弹出窗口是否被 Chrome 的弹出窗口拦截器阻止。我尽量避免浏览器嗅探而喜欢特征提取。有没有不用浏览器嗅探的办法？

编辑 : 我现在已经尝试使用 newWin.outerHeight、 newWin.left和其他类似的属性来完成这个任务。当弹出窗口被阻止时，Google Chrome 将所有的位置和高度值返回为0。

不幸的是，即使弹出窗口实际打开了未知的时间，它也返回相同的值。经过一段神奇的时间后(在我的测试中是几秒钟) ，位置和大小信息将作为正确的值返回。换句话说，我还是没有找到答案。如果你能帮忙，我将不胜感激。

97755 次浏览
小开

Check the position of the window relative to the parent. Chrome makes the window appear almost off-screen.

小开

Jason's answer is the only method I can think of too, but relying on position like that is a little bit dodgy!

These days, you don't really need to ask the question “was my unsolicited popup blocked?”, because the answer is invariably “yes” — all the major browsers have the popup blocker turned on by default. Best approach is only ever to window.open() in response to a direct click, which is almost always allowed.

小开
最佳答案

Well the "magical time" you speak of is probably when the popup's DOM has been loaded. Or else it might be when everything (images, outboard CSS, etc.) has been loaded. You could test this easily by adding a very large graphic to the popup (clear your cache first!). If you were using a Javascript Framework like jQuery (or something similar), you could use the ready() event (or something similar) to wait for the DOM to load before checking the window offset. The danger in this is that Safari detection works in a conflicting way: the popup's DOM will never be ready() in Safari because it'll give you a valid handle for the window you're trying to open -- whether it actually opens or not. (in fact, i believe your popup test code above won't work for safari.)

I think the best thing you can do is wrap your test in a setTimeout() and give the popup 3-5 seconds to complete loading before running the test. It's not perfect, but it should work at least 95% of the time.

Here's the code I use for cross-browser detection, without the Chrome part.

function _hasPopupBlocker(poppedWindow) {
var result = false;


try {
if (typeof poppedWindow == 'undefined') {
// Safari with popup blocker... leaves the popup window handle undefined
result = true;
}
else if (poppedWindow && poppedWindow.closed) {
// This happens if the user opens and closes the client window...
// Confusing because the handle is still available, but it's in a "closed" state.
// We're not saying that the window is not being blocked, we're just saying
// that the window has been closed before the test could be run.
result = false;
}
else if (poppedWindow && poppedWindow.test) {
// This is the actual test. The client window should be fine.
result = false;
}
else {
// Else we'll assume the window is not OK
result = true;
}


} catch (err) {
//if (console) {
//    console.warn("Could not access popup window", err);
//}
}


return result;
}

What I do is run this test from the parent and wrap it in a setTimeout(), giving the child window 3-5 seconds to load. In the child window, you need to add a test function:

function test() {}

The popup blocker detector tests to see whether the "test" function exists as a member of the child window.

ADDED JUNE 15 2015:

I think the modern way to handle this would be to use window.postMessage() to have the child notify the parent that the window has been loaded. The approach is similar (child tells parent it's loaded), but the means of communication has improved. I was able to do this cross-domain from the child:

$(window).load(function() {
this.opener.postMessage({'loaded': true}, "*");
this.close();
});

The parent listens for this message using:

$(window).on('message', function(event) {
alert(event.originalEvent.data.loaded)
});

Hope this helps.

小开

HI

I modified the solutions described above slightly and think that it is working for Chrome at least. My solution is made to detect if popup is blocked when the main page is opened, not when popup is opened, but i am sure there are some people that can modify it.:-) The drawback here is that the popup-window is displayed for a couple of seconds (might be possible to shorten a bit) when there is no popup-blocker.

I put this in the section of my 'main' window

<script type="text/JavaScript" language="JavaScript">


var mine = window.open('popuptest.htm','popuptest','width=1px,height=1px,left=0,top=0,scrollbars=no');
if(!mine|| mine.closed || typeof mine.closed=='undefined')
{
popUpsBlocked = true
alert('Popup blocker detected ');
if(mine)
mine.close();
}
else
{
popUpsBlocked = false
var cookieCheckTimer = null;
cookieCheckTimer =  setTimeout('testPopup();', 3500);
}




function testPopup()
{
if(mine)
{
if(mine.test())
{
popUpsBlocked = false;
}
else
{
alert('Popup blocker detected ');
popUpsBlocked = true;
}
mine.close();
}


}
</script>

The popuptest looks like this:

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head>
<title>Popup test</title>
<script type="text/javascript" language="Javascript">
function test() {if(window.innerHeight!=0){return true;} else return false;}
</script>
</head>


<body>
</body>
</html>

As i call the test-function on the popup-page after 3500 ms the innerheight has been set correctly by Chrome.

I use the variable popUpsBlocked to know if the popups are displayed or not in other javascripts. i.e 

function ShowConfirmationMessage()
{
if(popUpsBlocked)
{
alert('Popups are blocked, can not display confirmation popup. A mail will be sent with the confirmation.');
}
else
{
displayConfirmationPopup();
}
mailConfirmation();
}
小开

I had a similar problem with popups not opening in Chrome. I was frustrated because I wasn't trying to do something sneaky, like an onload popup, just opening a window when the user clicked. I was DOUBLY frustrated because running my function which included the window.open() from the firebug command line worked, while actually clicking on my link didn't! Here was my solution:

Wrong way: running window.open() from an event listener (in my case, dojo.connect to the onclick event method of a DOM node).

dojo.connect(myNode, "onclick", function() {
window.open();
}

Right way: assigning a function to the onclick property of the node that called window.open().

myNode.onclick = function() {
window.open();
}

And, of course, I can still do event listeners for that same onclick event if I need to. With this change, I could open my windows even though Chrome was set to "Do not allow any site to show pop-ups". Joy.

If anyone wise in the ways of Chrome can tell the rest of us why it makes a difference, I'd love to hear it, although I suspect it's just an attempt to shut the door on malicious programmatic popups.

小开

As far as I can tell (from what I've tested) Chrome returns a window object with location of 'about:blank'. So, the following should work for all browsers:

var newWin = window.open(url);
if(!newWin || newWin.closed || typeof newWin.closed=='undefined' || newWin.location=='about:blank')
{
//POPUP BLOCKED
}
小开

Here's a version that is currently working in Chrome. Just a small alteration away from Rich's solution, though I added in a wrapper that handles the timing too.

function checkPopupBlocked(poppedWindow) {
setTimeout(function(){doCheckPopupBlocked(poppedWindow);}, 5000);
}


function doCheckPopupBlocked(poppedWindow) {


var result = false;


try {
if (typeof poppedWindow == 'undefined') {
// Safari with popup blocker... leaves the popup window handle undefined
result = true;
}
else if (poppedWindow && poppedWindow.closed) {
// This happens if the user opens and closes the client window...
// Confusing because the handle is still available, but it's in a "closed" state.
// We're not saying that the window is not being blocked, we're just saying
// that the window has been closed before the test could be run.
result = false;
}
else if (poppedWindow && poppedWindow.outerWidth == 0) {
// This is usually Chrome's doing. The outerWidth (and most other size/location info)
// will be left at 0, EVEN THOUGH the contents of the popup will exist (including the
// test function we check for next). The outerWidth starts as 0, so a sufficient delay
// after attempting to pop is needed.
result = true;
}
else if (poppedWindow && poppedWindow.test) {
// This is the actual test. The client window should be fine.
result = false;
}
else {
// Else we'll assume the window is not OK
result = true;
}


} catch (err) {
//if (console) {
//    console.warn("Could not access popup window", err);
//}
}


if(result)
alert("The popup was blocked. You must allow popups to use this site.");
}

To use it just do this:

var popup=window.open('location',etc...);
checkPopupBlocked(popup);

If the popup get's blocked, the alert message will display after the 5 second grace period (you can adjust that, but 5 seconds should be quite safe).

小开

This fragment incorporates all of the above - For some reason - StackOverflow is excluding the first and last lines of code in the code block below, so I wrote a blog on it. For a full explanation and the rest of the (downloadable) code have a look at my blog at thecodeabode.blogspot.com

var PopupWarning = {


init : function()
{


if(this.popups_are_disabled() == true)
{
this.redirect_to_instruction_page();
}
},


redirect_to_instruction_page : function()
{
document.location.href = "http://thecodeabode.blogspot.com";
},


popups_are_disabled : function()
{
var popup = window.open("http://localhost/popup_with_chrome_js.html", "popup_tester", "width=1,height=1,left=0,top=0");


if(!popup || popup.closed || typeof popup == 'undefined' || typeof popup.closed=='undefined')
{
return true;
}


window.focus();
popup.blur();


//
// Chrome popup detection requires that the popup validates itself - so we need to give
// the popup time to load, then call js on the popup itself
//
if(navigator && (navigator.userAgent.toLowerCase()).indexOf("chrome") > -1)
{
var on_load_test = function(){PopupWarning.test_chrome_popups(popup);};
var timer = setTimeout(on_load_test, 60);
return;
}




popup.close();
return false;
},


test_chrome_popups : function(popup)
{
if(popup && popup.chrome_popups_permitted && popup.chrome_popups_permitted() == true)
{
popup.close();
return true;
}


//
// If the popup js fails - popups are blocked
//
this.redirect_to_instruction_page();
}
};


PopupWarning.init();
小开

Rich's answer isn't going to work anymore for Chrome. Looks like Chrome actually executes any Javascript in the popup window now. I ended up checking for a screenX value of 0 to check for blocked popups. I also think I found a way to guarantee that this property is final before checking. This only works for popups on your domain, but you can add an onload handler like this:

var myPopup = window.open("site-on-my-domain", "screenX=100");
if (!myPopup)
alert("failed for most browsers");
else {
myPopup.onload = function() {
setTimeout(function() {
if (myPopup.screenX === 0)
alert("failed for chrome");
}, 0);
};
}

As many have reported, the "screenX" property sometimes reports non-zero for failed popups, even after onload. I experienced this behavior as well, but if you add the check after a zero ms timeout, the screenX property always seems to output a consistent value.

Let me know if there are ways to make this script more robust. Seems to work for my purposes though.

小开

Just one improvement to InvisibleBacon's snipet (tested in IE9, Safari 5, Chrome 9 and FF 3.6):

var myPopup = window.open("popupcheck.htm", "", "directories=no,height=150,width=150,menubar=no,resizable=no,scrollbars=no,status=no,titlebar=no,top=0,location=no");
if (!myPopup)
alert("failed for most browsers");
else {
myPopup.onload = function() {
setTimeout(function() {
if (myPopup.screenX === 0) {
alert("failed for chrome");
} else {
// close the test window if popups are allowed.
myPopup.close();
}
}, 0);
};
}
小开 
function openPopUpWindow(format)
{
var win = window.open('popupShow.html',
'ReportViewer',
'width=920px,height=720px,left=50px,top=20px,location=no,directories=no,status=no,menubar=no,toolbar=no,resizable=1,maximize:yes,scrollbars=0');


if (win == null || typeof(win) == "undefined" || (win == null && win.outerWidth == 0) || (win != null && win.outerHeight == 0) || win.test == "undefined")
{
alert("The popup was blocked. You must allow popups to use this site.");
}
else if (win)
{
win.onload = function()
{
if (win.screenX === 0) {
alert("The popup was blocked. You must allow popups to use this site.");
win.close();
}
};
}
}
小开

This worked for me:

    cope.PopupTest.params = 'height=1,width=1,left=-100,top=-100,location=no,toolbar=no,menubar=no,scrollbars=no,resizable=no,directories=no,status=no';
cope.PopupTest.testWindow = window.open("popupTest.htm", "popupTest", cope.PopupTest.params);


if( !cope.PopupTest.testWindow
|| cope.PopupTest.testWindow.closed
|| (typeof cope.PopupTest.testWindow.closed=='undefined')
|| cope.PopupTest.testWindow.outerHeight == 0
|| cope.PopupTest.testWindow.outerWidth == 0
) {
// pop-ups ARE blocked
document.location.href = 'popupsBlocked.htm';
}
else {
// pop-ups are NOT blocked
cope.PopupTest.testWindow.close();
}

The outerHeight and outerWidth are for chrome because the 'about:blank' trick from above doesn't work in chrome anymore.

小开

The following is a jQuery solution to popup blocker checking. It has been tested in FF (v11), Safari (v6), Chrome (v23.0.127.95) & IE (v7 & v9). Update the _displayError function to handle the error message as you see fit.

var popupBlockerChecker = {
check: function(popup_window){
var _scope = this;
if (popup_window) {
if(/chrome/.test(navigator.userAgent.toLowerCase())){
setTimeout(function () {
_scope._is_popup_blocked(_scope, popup_window);
},200);
}else{
popup_window.onload = function () {
_scope._is_popup_blocked(_scope, popup_window);
};
}
}else{
_scope._displayError();
}
},
_is_popup_blocked: function(scope, popup_window){
if ((popup_window.innerHeight > 0)==false){ scope._displayError(); }
},
_displayError: function(){
alert("Popup Blocker is enabled! Please add this site to your exception list.");
}
};

Usage:

var popup = window.open("http://www.google.ca", '_blank');
popupBlockerChecker.check(popup);

Hope this helps! :)

小开

Wow there sure are a lot of solutions here. This is mine, it uses solutions taken from the current accepted answer (which doesn't work in latest Chrome and requires wrapping it in a timeout), as well as a related solution on this thread (which is actually vanilla JS, not jQuery).

Mine uses a callback architecture which will be sent true when the popup is blocked and false otherwise.

window.isPopupBlocked = function(popup_window, cb)
{
var CHROME_CHECK_TIME = 2000;       // the only way to detect this in Chrome is to wait a bit and see if the window is present


function _is_popup_blocked(popup)
{
return !popup.innerHeight;
}


if (popup_window) {
if (popup_window.closed) {
// opened OK but was closed before we checked
cb(false);
return;
}
if (/chrome/.test(navigator.userAgent.toLowerCase())) {
// wait a bit before testing the popup in chrome
setTimeout(function() {
cb(_is_popup_blocked(popup_window));
}, CHROME_CHECK_TIME);
} else {
// for other browsers, add an onload event and check after that
popup_window.onload = function() {
cb(_is_popup_blocked(popup_window));
};
}
} else {
cb(true);
}
};
小开

I'm going to just copy/paste the answer provided here: https://stackoverflow.com/a/27725432/892099 by DanielB . works on chrome 40 and it's very clean. no dirty hacks or waiting involves.

function popup(urlToOpen) {
var popup_window=window.open(urlToOpen,"myWindow","toolbar=no, location=no, directories=no, status=no, menubar=no, scrollbars=yes, resizable=yes, copyhistory=yes, width=400, height=400");
try {
popup_window.focus();
}
catch (e) {
alert("Pop-up Blocker is enabled! Please add this site to your exception list.");
}
}
小开

How about a Promise approach ?

const openPopUp = (...args) => new Promise(s => {
const win = window.open(...args)
if (!win || win.closed) return s()
setTimeout(() => (win.innerHeight > 0 && !win.closed) ? s(win) : s(), 200)
})

And you can use it like the classic window.open

const win = await openPopUp('popuptest.htm', 'popuptest')
if (!win) {
// popup closed or blocked, handle alternative case
}

You could change the code so that it fail the promise instead of returning undefined, I just thought that if was an easier control flow than try / catch for this case.


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