How to detect Adblock on my website

Question

I would like to be able to detect if the user is using adblocking software when they visit my website  If they are using it  I want to display a message asking them to turn it off in order to support the project  like this website does   If you enter to that site and your browser has some kind of adblock software enabled  then the site instead of showing the actual ads shows a little banner telling the users that the ad revenue is used for hosting the project and they should consider turning Adblock off   I want to do that on my website  I m using adsense ads on it  How can I do that

User · Answer

I have implemented many methods to detect adblock in the browser and all solutions failed except below one in javascript:

window.onload = function() {
    setTimeout(function() {
        var ad = document.querySelector("ins.adsbygoogle");
        if (ad && ad.innerHTML.replace(/\s/g, "").length == 0) {
            console.log('You seem to blocking Google AdSense ads in your browser.');
        }
    }, 2000);
};

I hope this javascript solution will help you. Thanks for asking this question.

User · Answer

lt script src  http   code jquery com jquery-latest js  gt  lt  script gt   lt script gt var adb true  lt  script gt   lt script src    getbanner cfm   gt  lt  script gt   lt script gt    document  ready function   if adb alert  AdBlock         lt  script gt    and in getbanner cfm file   adb   false    I think it s easiest way to detect adblock

User · Answer

I m using JavaScript promises and jQuery to detect if the user has an adblocker enabled    Create a small image and rename it to ads jpg  or whatever extension   Create a JavaScript function to call it when you need   function hasAdBlocker       return new Promise function resolve  reject        let img       lt img style  display  none   src  ads jpg    gt          img on  load   reject       img on  error   resolve           body   append img            Call it like this   hasAdBlocker   then function        console log  Has adBlock      function         console log  No adBlock dedected

User · Answer

My solution is not specific to a certain ad network and is very lightweight  I ve been running it in production for a few years  AdBlock blocks all URLs containing the word  quot ads quot  or  quot prebid quot   So this is what I did  I added a small js file to my webroot with the name prebid-ads js Update 2020-07-27  you might want to call the file prebid-ads js or something  because uBlock Origin does not block files with name like ads js anymore  This is the only line of code in that file var canRunAds   true   Then somewhere in my page   lt html gt     lt head gt       lt script src  quot  js prebid-ads js quot  gt  lt  script gt     lt  head gt     lt body gt       lt script gt        if  window canRunAds     undefined               adblocker detected  show fallback         showFallbackImage                 lt  script gt     lt  body gt   lt  html gt   Files like ads js are blocked by at least these adblockers on Chrome   AdBlock Adblock Plus Adblock Pro Ghostery  Update on 2019-02-15  Added Ghostery in the list above because the extension now also blocks requests to ads js  Very handy  Does this mean that Ghostery is actually helping us devs to detect the blocking of ads with their extension  Does not work with  Privacy Badger

User · Answer

Just add small script on your site   var isAdsDisplayed   true    With name adsbygoogle js  Then do following    lt script src   js adsbygoogle js  gt  lt  script gt   lt script gt  if window isAdsDisplayed     undefined          AdBlock is enabled  Show message or track custom data here    lt  script gt    Found this solution here

User · Answer

Just created my own  plugin  for solving this and it works really well   adBuddy   jsBuddy    ADBuddy JSBuddy GitHub  I added mobile compatibility and jsBlocking detection among other things     Like an overlay that is shown to the users asking them to disable the adBlocking jsBlocking software   Also made it responsive friendly   It s opensourced under the Coffeeware License

User · Answer

timing s answer is nice thinked but no more working  so I have updated the name of the js file to  adsense  from  ads  and it is working back like a charm   Here is the code  maybe this wil help someone    lt html gt         lt head gt               lt script src   adsense js  gt  lt  script gt         lt  head gt                lt body gt                      lt script gt                             if  window adblockDetecter     undefined                                  Do anithing  adblocker detected                             alert  Adblocker Detected                          lt  script gt               lt  body gt   lt  html gt    In the Js file put just this line  var adblockDetecter   true

User · Answer

I m a bit late to the party here but here s the simplest solution I know for the old AdSense code with jQuery    ads      ins    if   ads length    0           Replacement code about you needing ad income     And in plain JavaScript    ads   document getElementsByTagName  ins    if   ads length    0           Replacement code about you needing ad income     For  ads you can use any selector that you know is consistent with the ad being generated  E g  for the new AdSense code you can use    iframe google ads frame1

User · Answer

This approach I use on my site  maybe you will find it helpful  In my opinion  it s the simpliest solution   AdBlocker blocks specific classes and html elements  by inspecting these selectors of any blocked ads in developer console  they are all listed  you can see which elements will be always blocked    E g  just inspect this question page on stackoverflow and you will see bunch of blocked ads   For example  any element with bottom-ad class is automatically blocked    I created a non-empty div element with bottom-ad class   lt div class  bottom-ad  style  width  1px  height  1px   gt HI lt  div gt  After page loads just check if this element is hidden  I used jQuery  but feel free to use javascript      bottom-ad   css  display       none  or even better by using     bottom-ad   is   visible     If value is true  then AdBlocker is active

User · Answer

this worked for me the document has to be ready before you look for adblock  hope this help someone   jQuery document  ready function      var adBlockEnabled   false  var testAd   document createElement  div    testAd innerHTML     amp nbsp    testAd className    adsbox   document body appendChild testAd   window setTimeout function       if  testAd offsetHeight     0        adBlockEnabled   true        testAd remove      console log  AdBlock Enabled     adBlockEnabled     100

User · Answer

ads js var e document createElement  div   e id  GjyTonmtkfKD  e style display  none  document body appendChild e    html file  lt div id  quot GPlTKAacLIdW quot  gt Our website is made possible by displaying online advertisements to our visitors  lt br gt Please consider supporting us by disabling your ad blocker  lt  div gt  lt script src  quot  ads js quot  type  quot text javascript quot  gt  lt  script gt  lt script type  quot text javascript quot  gt if  document getElementById  GjyTonmtkfKD     document getElementById  GPlTKAacLIdW   style display  block     lt  script gt   This is also shown on https   www detectadblock com

User · Answer

You can check this out it might help detect-adblocker  Its an implementation of timing answer  Add this before any script in the head tag    lt head gt       lt title gt  lt  title gt       lt meta  gt        lt  --adBlocker detection code - START-- gt       lt script src    adblocker fortiapp com ads js  gt  lt  script gt       lt script gt           function  i  o  g  r                i o     typeof i o     typeof undefined    g   r            window   adblocker   true  false        lt  script gt       lt  --adBlocker detection code - END-- gt          Other scripts   lt  head gt    Then later use it   if  adblocker           the add blocker is enabled  else         ad blocker is not enabled

User · Answer

Now there s a better way to do it using a simple JS script called AdBlock Detector  Here s how to use it  Add this to your  lt head gt  section   lt script type  quot text javascript quot  gt  window onload   function     var iframe   document createElement  iframe        randomDomain   Math floor Math random      10000 - 100   1     100      iframeLoaded   true       iframe src    quot http    quot   randomDomain   quot  com ads html quot   iframe height    quot  1px quot   iframe width    quot  1px quot   iframe id    some-ad   iframe onload   function    iframeLoaded   false     document body appendChild iframe    setTimeout function          var someAd   document getElementById  some-ad        if  iframeLoaded           someAd    null            someAd style display     quot none quot             someAd style display     quot hidden quot             someAd style visibility     quot hidden quot             someAd offsetHeight    0          document getElementById  ab-message   style display    block       someAd remove       500       lt  script gt   lt br gt   Now you can use the ab-message id wherever you want to display a message to AdBlock users   lt div id  quot ab-message quot  style  quot display  none quot  gt Your message here  lt  div gt   Note the inline style added to hide it originally  Of course  you can also do this from your own CSS file    Also note that it takes 500ms  that s because it has to wait for the adblocker to do its thing or it won t work  A little explanation of how this script works First  it appends an iframe with a source of a randomly generated link   It is randomly generated because some adblocks are smart  at some point  they realize a link is fake    Then it runs multiple checks on that iframe  if it was loaded successfully or if its style was modified   If one of these tests is true  it then displays the ab-message element to adblock users  This script works for most  if not all  ad blockers  EXTRA No point  really  could have just created a gist  but instead I created a Github project  but still  check it out and star it if it helped you abDetector  Simple vanilla JavaScript AdBlock Detector  Enjoy

User · Answer

They re utilizing the fact that Google s ad code creates an iframe with the id  iframe    So as long as you don t already have something on your page with that ID  this d work for you too    lt p id  ads  gt   lt script type  text javascript  gt  lt  -- google ad client    their-ad-code-here      160x600  droite    google ad slot    their-ad-code-here   google ad width   160  google ad height   600    -- gt   lt  script gt   lt script type  text javascript  src  http   pagead2 googlesyndication com pagead show ads js  gt   lt  script gt    lt  p gt    lt script type  text javascript  gt  lt  -- if document getElementsByTagName  iframe   item 0     null        document write   lt div style  width 160px  height 600px  padding-top  280px  margin-left 5px border 1px solid  000000  text-align center  font-family century gothic  arial  helvetica  sans serif padding-left 5px padding-right 5px   gt Advertising seems to be blocked by your browser  lt br   gt  lt br   gt  lt span style  font-size 10px  gt Please notice that advertising helps us to host the project  lt br   gt  lt br   gt If you find these ads intrusive or inappropriate  please contact me  lt  span gt  lt img src  http   www playonlinux com images abp jpg  alt  Adblock Plus    gt  lt  div gt       -- gt  lt  script gt

User · Answer

the safe way is to wrap your ads inside  lt div gt  and check the height   lt div id  check-ab  gt     your ads code     lt  div gt   setTimeout function      if document getElementById  check-ab   offsetHeight     0       console log  ads blocked          else      console log  ads running           100     it work with adblock plus and bluehell firewall

User · Answer

An efficient way to check if there is an adblock  Simply check if there is adblock enabled by trying to trigger the URL of google ads  If yes then run the callback has adblock  if not then run the callback no adblock  This solution costs one request more but at least it always works  var hasAdBlock   function  callback has adblock  callback no adblock           getScript   quot https   pagead2 googlesyndication com pagead show ads js quot             done function  script  textStatus                 callback no adblock                        fail function  jqxhr  settings  exception                 callback has adblock                This solution works for all kind of ads  not only google adsense

User · Answer

My advice is  don t do it   Any scenario where you treat people as  wrongdoers  is going to result in them fighting back   Here s my proposal   Put a small unobtrusive message at the top of the page  regardless of whether ads are being blocked  with the text I  totally  respect your right to block ads and a link to another page pop-up entitled Read more       On the other page  make it clear that you understand it s their computer and they are free to use ad blocking   Also make it clear in a non-accusatory way that the use of these blockers makes it more difficult for you to deliver great content  explaining why in detail  and that  while you d prefer the ad blocking to not happen on your site  it s totally their decision  Focus on the positives of turning off blocking   Those who are vehemently opposed to ads will ignore this but you never stood a chance of convincing them anyway  Those who are indifferent may well be swayed by your appeal since you re not doing the whole  let me get my way or I ll take my ball and go home  thing that honestly should be the exclusive domain of five year old children   Remember  no-one held a gun to your head and forced you to put your stuff on the net  Treat your readership users with respect and you ll probably find a good number of them will reciprocate

User · Answer

I ve not seen any good  simple answers that address both of the two types of ad blockers in prevalent use today  so I ll provide my own answer     Ad blocker type 1   Blocks web advertisement scripts based upon the script name  AdBlock  uBlock origin etc       Ad blocker type 2   Blocks web advertisements based upon a database of ad serving host names  FireFox content blocker  various gateway plugins  etc      This solution works for both   It throws up a big pink  appeal box  asking users to disable their ad blocker   We like to place it below the menus and above the content   We don t actually block access to the site - this just pushes the content down on the page a bit  but people will find it annoying just enough that virtually all will comply and disable their ad blocker on your site     So here is the solution   A  Create a file named advertisement js and place it in the root of your web server  consisting of the following line of code   document write   lt div id  tester  gt an advertisement lt  div gt       B  Inject the following into your web pages  you might even use your ad server code to do this     Suggested location is below the menus and above the content    lt script src  advertisement js  gt  lt  script gt   lt table id  tbl ab appeal  style  width  900px  margin-left auto  margin-right  auto  padding  25px  background   FCC  border  1px solid  F66  visibility collapse  border-collapse  collapse   gt       lt tr gt           lt td gt We ve detected that you re using an  lt strong gt ad content blocking lt  strong gt  browser plug-in or feature  Ads provide a critical source of revenue to the continued operation of  This website name   amp nbsp  We ask that you disable ad blocking while on  This             website name  in the best interests of our community  lt  td gt       lt  tr gt   lt  table gt   lt script gt      if  document getElementById  tester      undefined  adsBlocked         function adsBlocked             document getElementById  tbl ab appeal   style visibility    visible           document getElementById  tbl ab appeal   style borderCollapse    separate           document getElementById  tbl ab appeal   style marginTop    10px          document getElementById  tbl ab appeal   style marginBottom    10px         lt  script gt   lt script onerror  adsBlocked    src    www googletagservices com tag js gpt js  gt  lt  script gt    How does it work   The message is loaded  but made zero height and invisible   If either the local script advertisement js fails to run  or the remote AdSense script www googletagservices com tag js gpt js fails to load  the box is made visible

User · Answer

Most adblocker cancel HTTP request to ads js and make 0px for the element but sometime adblocker removed the DOM  and some answer above will fail because not checking existence of the element    Using setTimeout   is good practice because without it  will make the script race with adblocker   The script below will check if dom exist removed and check offsetHeight of an element if it exist    x000D   x000D  setTimeout function     x000D    var a   document querySelector   showads    x000D      b   a    a offsetHeight   false   true    true  x000D    console log  ads blocked    b  x000D     200      don t too fast or will make the result wrong  x000D   lt div class  ads showads  gt  x000D    Lorem ipsum dolor sit amet  consectetur adipisicing elit  x000D   lt  div gt  x000D   x000D   x000D

User · Answer

My easiest solution with jquery is     ajax       url    scripts advertisement js      this is just an empty js file     dataType   script     fail function             redirect or display message here       advertisement js just contains nothing  When somebody uses adblock  it fails and the function gets called

User · Answer

It works fine for me          lt html gt           lt head gt               lt script src  https   ajax googleapis com ajax libs jquery 3 4 1 jquery min js  gt  lt  script gt           lt  head gt           lt body gt               lt p gt If you click on me  I will disappear  lt  p gt               lt p gt Click me away  lt  p gt               lt p gt Click me too  lt  p gt               lt script gt                  var adBlockEnabled   false                  var adSense   document createElement  div                    adSense innerHTML     amp nbsp                    adSense className    adsbox                   document body appendChild adSense                   window setTimeout function                       if  adSense offsetHeight     0                        adBlockEnabled   true                                        adSense remove                      if  adBlockEnabled                            alert  Adblock enabled                        else                           alert  Adblock disabled or Not installed                                           100                lt  script gt           lt  body gt       lt  html gt

User · Answer

This one works good if there s an adBlocker it will alert you  x000D   x000D  checkAdBlocker     function checkAdBlocker         try           fetch              new Request  https   pagead2 googlesyndication com pagead js adsbygoogle js                     method   HEAD                   mode   no-cors                  catch error   gt                showNotification                     catch  e               Request failed  likely due to ad blocker         showNotification            function showNotification         alert  Please disable adBlocker     x000D   x000D   x000D

User · Answer

AdBlock seems to block the loading of AdSense  etc  JavaScript files  So  if you are using asynchronous version of AdSense ads you can check if adsbygoogle is an Array  This must be checked after few seconds since the asynchronous script is    asynchronous  Here is a rough outline   window setTimeout function        if adsbygoogle instanceof Array               adsbygoogle js did not execute  probably blocked by an ad blocker       else              adsbygoogle js executed          2000     To clarify  here is an example of what the AdSense asynchronous ads code looks like    lt  -- this can go anywhere -- gt   lt script async src    pagead2 googlesyndication com pagead js adsbygoogle js  gt  lt  script gt    lt  -- this is where the ads display -- gt   lt ins class  adsbygoogle      gt  lt  ins gt   lt script gt   adsbygoogle   window adsbygoogle        push       lt  script gt    Notice that adsbygoogle is initialized as an Array  The adsbygoogle js library changes this array into Object  push       when it executes  Checking the type of variable after a certain time can tell you if the script was loaded

User · Answer

Most ads are dynamically loaded in javascript   I just used the onerror event to detect whether the ad script could be loaded or not   Seems to work   Example with GoogleAds    lt script async src    pagead2 googlesyndication com pagead js adsbygoogle js  onerror  adBlockFunction     gt  lt  script gt    This can be used on other elements as well to see if an ad blocker is blocking the content   This method can produce false positives if the remote elements doesn t exist or cannot be reached

User · Answer

All of the answers above are valid  however most will not work for DNS-level ad blocking   DNS-level ad blockers like pi-hole  basically return NXDOMAIN domain does not exist  for a list of ad blocking domains  e g  telemetry microsoft com will  not exist  when it does     There are a few ways to circumvent this   Method A  Request for ads by ip address  not domain   This method is a bit annoying as you would have to keep track of ip addresses  This will be problematic if your code isn t well maintained or updated regularly   Method B  Block all requests that fail- even if the client reports NXDOMAIN   This will be very annoying for users if it is a  legitimate  NXDOMAIN

User · Answer

Despite the age of this question  I recently found it very useful and therefore can only assume there are others still viewing it  After looking here and elsewhere I surmised that the main three client side checks for indirectly detecting an ad blocker were to check for blocked  div img  blocked iframes and blocked resources  javascript files    Maybe it s over the top or paranoid but it covers for ad blocking systems that block only one or two out of the selection and therefore may not have been covered had you only done the one check   On the page your are running the checks add   I am using jQuery    lt script type  text javascript  src  jquery js  gt  lt  script gt   lt script type  text javascript  src  advertisement js  gt  lt  script gt   lt script type  text javascript  src  abds js  gt  lt  script gt    and add the following anywhere else on the page    lt div id  myTestAd  gt  lt img src  http   placehold it 300x250 000000 ffffff png amp text Advert    gt  lt  div gt    I used a div with a bait name as well as an externally hosted image with the text  Advert  and in dimensions used by AdSense  thanks to placehold it     In advertisement js you should append something to the document which we can check for later  Although it seems like you re doing the same as before  you are actually checking for the file  advertisement js  itself being loaded  not the output     document  ready            body   append   lt div id   myTestAd2   gt check lt  div gt            And then the ad blocker detection script which combines everything    document  ready function         var ifr     lt iframe id  adServer  src  http   ads google com adserver adlogger tracker php  width  300  height  300  gt  lt  iframe gt           body   append ifr          window  on  load  function          var atb       myTestAd        var atb2      myTestAd2        var ifr       adServer         setTimeout function                  if   atb height    0                  atb filter   visible   length  0                  atb filter   hidden   length gt 0                  atb is  hidden                    atb css  visibility     hidden                   atb css  display     none                   atb2 html     check                   ifr height    300                  ifr width    300                          alert  You re using ad blocker you normal person  you                      500          When the document is ready  i e  the markup is loaded  we add the iframe to the document also  Then  when the window is loaded  i e  the content incl  images etc  is loaded  we check    The dimensions and visibility of the first test div  That the content of the second test div is  check   as it would have been if the advertimsent js was not blocked  The dimensions  and I guess visibility  as a hidden object has no height or width   of the iframe   And the styles   div myTestAd  iframe adServer       display  block      position  absolute      left  -9999px      top  -9999px     div myTestAd2       display  none      Hope this helps

User · Answer

http   thepcspy com read how to block adblock   With jQuery   function blockAdblockUser         if      myTestAd   height      0            window location    http   example com AdblockNotice html              document  ready function        blockAdblockUser          Of course  you would need to have a landing page for AdblockNotice html  and the  myTestAd class needs to reflect your actual ad containers  But this should work   EDIT  As TD Nijboer recommends  a better way is to use the  hidden  or  visible  as I use below  selector so that display  none is also checked   function blockAdblockUser         if      myTestAd   filter   visible   length    0               All are hidden  or  not visible   so             Redirect  show dialog  do something          else if      myTestAd   filter   hidden   length  gt  0               Maybe a different error if only some are hidden             Redirect  show dialog  do something              Of course  both of these could be combined into one if block if desired   Note that visibility  hidden will not be captured by either as well  where the layout space stays  but the ad is not visible   To check that  another filter can be used       myTestAd   filter function fi        return   this  css  visibility       hidden        Which will give you an array of ad elements which are  invisible   with any being greater than 0 being a problem  in theory

User · Answer

This is what worked for me   function isAdBlocked          return  typeof window google jobrunner       undefined     true   false       document  ready function        if isAdBlocked             alert  Y U NO LIKE ADS

User · Answer

For me none of the tricks worked  may be I was doing something wrong  but this is a very specific way to implement for google ads   window onload   function        if  document getElementsByClassName  google-auto-placed   length    0                      Adblock Detected                  If you have other ad system like amazon  look for their generic class name   ids by inspecting page    If you are planing to put this code in seperate  js file make sure file name does not have  Ad  word in it  just name it magic js  If Google ever decides to change div name  this method would fail  but that seems unlikely

User · Answer

To detect if the user is blocking ads  all you have to do is find a function in the ad javascript and try testing for it  It doesn t matter what method they re using to block the ad  Here s what it looks like for Google Adsense ads   if  window hasOwnProperty  google render ad      window google render ad     undefined           They re blocking ads  display your banner     This method is outlined here  http   www metamorphosite com detect-web-popup-blocker-software-adblock-spam

User · Answer

Run this with adblock on and Paste this in your page-footer before the close of the  lt  body gt  tag on your page    x000D   x000D   lt script type  text javascript   charset  utf-8  gt  x000D     Place this code snippet near the footer of your page before the close of the  body tag x000D      x000D                               x000D  eval function p a c k e d  e function c  return c lt a    e parseInt c a      c c a  gt 35 String fromCharCode c 29  c toString 36    if     replace     String   while c--  d e c   k c   e c  k  function e  return d e    e function   return   w    c 1  while c--  if k c   p p replace new RegExp    b  e c     b   g   k c    return p    q O      29   1W   1S q i 0 i lt 12 i   O  29 X B N B K   29 F   q 2z 1 2u 4p 2v 4o 2x 4n 33 C e  q i  1 o C   z k 1g  k 2T   2J   t  D 2T   1V   t  S k 2V   2L   t  D 2V   27   t    t C   z  i amp  amp  k 1g  4m 2E     1V    k 2O     2K     i  0 o   e     z k 2O     2K    e   S z k 1g  k 1g   2J   t  D 1g   1V   t  S k 2M 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User · Answer

If you have problem with adblock blocking new tab in browser you can do something like this      a   click function e      change    a   into more specific selector     const openedWindow   window open this href    blank            Check if browser tab was closed within 0 3 second  user can t  adblock does       setTimeout      gt            if  openedWindow closed                alert  Adblock detected                      300        e preventDefault       return false if you like       This code is ONLY useful IF you don t want to block entire site AND just tell users why their browser tabs are closed

User · Answer

In React js you can do the following   class AdblockDetect extends Component     constructor  props        super props      this state           usingAdblock  false              componentDidMount         this setState   usingAdblock  this fakeAdBanner offsetHeight     0            render         if  this state usingAdblock     true          return this props children             return          lt div         ref  r   gt   this fakeAdBanner   r           style    height   1px   width   1px   visiblity   none   pointerEvents   none             className  adBanner          gt                class App extends Component     render         return          lt div className  App  gt           lt AdblockDetect gt You are using adblock lt  AdblockDetect gt         lt  div gt                 Source  https   stackoverflow com a 55635499 5539715

User · Answer

You don t need an extra HTTP request   you may simply calculate the height of a fake add  By the way  here is a full list matching the elements that adblockers avoid rendering   x000D   x000D  window adBlockRunning   function         return  getComputedStyle document getElementById  detect     display       none     true   false         console log window adBlockRunning   x000D   detect     height  1px    width  1px    position  absolute    left  -999em    top  -999em   x000D   lt div id  detect  class  ads ad adsbox doubleclick ad-placement carbon-ads  gt  lt  div gt  x000D   x000D   x000D

User · Answer

I understand your tension and you can check if element has been created by script or element is hidden  And if we speak about ad-blocking you can count only on the element visibility  not on the element presence    Element created with third-party script will never be present  that if script is not reachable at the moment  DNS error  remote web server error  offline web page preload  etc   and you ll always get false positive   All other answers with checks are correct  but keep this in mind

User · Answer

No extra requests  No external libraries  Just plain  simple JavaScript    x000D   x000D  var adBlockEnabled   false  x000D  var testAd   document createElement  div    x000D  testAd innerHTML     amp nbsp    x000D  testAd className    adsbox   x000D  document body appendChild testAd   x000D  window setTimeout function     x000D    if  testAd offsetHeight     0    x000D      adBlockEnabled   true  x000D      x000D    testAd remove    x000D    console log  AdBlock Enabled     adBlockEnabled  x000D     100   x000D   x000D   x000D     You create an element with the class adsbox  as defined as a removable element in the definition file of AdBlock Plus  You add it to the document and after a short while you read its offsetHeight If AdBlock is installed  the element won   t have any height    Credit to Christian Heilmann s post  I think it s by far the best solution for detecting AdBlock

User · Answer

Not a direct answer  but I d put the message behind the ad to be loaded    rather that trying to detect it  it d just show up when the ad doesn t

User · Answer

I ve only tested with AdBlock    if the ads js file solution won t work for you  this may    Somewhere in your  lt body gt  add    lt div class  ads-wrapper adTop adUnit  gt  lt  div gt    then you can detect if AdBlock is enabled after DOM ready and then trigger whatever you intend to do   var adBlockDetected   null    document  ready function         setTimeout function             adBlockDetected        ads-wrapper   length  gt  0         ads-wrapper   is   visible             if  adBlockDetected                  document  trigger  adblock-detected                     1000      give adblock time to do what it does best        document  on  adblock-detected   function                your code here

User · Answer

If using the new AdSense code  you can do an easy check  with out resorting to content or css checks   Place your ads as normal in your markup    lt ins class  adsbygoogle  style  display  block      data-ad-client  ca-pub-           data-ad-slot              data-ad-format  auto  gt  lt  ins gt   lt script gt  adsbygoogle   window adsbygoogle        push      lt  script gt    Then you call the adsense code at the bottom of your page  note do not use the  async  flag when calling the adsbygoogle js script     lt script src    pagead2 googlesyndication com pagead js adsbygoogle js  gt  lt  script gt    Then add this little snippit of code below that    lt script gt  if   adsbygoogle loaded          do something to alert the user    lt  script gt    AdSense always creates sets the flag adsbygoogle loaded to true when the ads are loaded   You could place the check in a setTimeout function to delay the check by a few seconds

User · Answer

No need for timeouts and DOM sniffing  Simply attempt to load a script from popular ad networks  and see if the ad blocker intercepted the HTTP request          Attempt to load a script from a popular ad network  Ad blockers will intercept the HTTP request         param  string  url     param  Function  cb     function detectAdBlockerAsync url  cb       var script   document createElement  script         script onerror   function            script onerror   null          document body removeChild script           cb               script src   url      document body appendChild script      detectAdBlockerAsync  http   ads pubmatic com AdServer js gshowad js   function        document body style background     c00

User · Answer

I know this is already answered  but I looked at the suggested sample site  and I see they do it like this    lt script type  text javascript  gt  if document getElementsByTagName  iframe   item 0     null        document write   lt div style  width  160px  height  600px  padding-top  280px  margin-left  5px  border  1px solid  666666  color   FFF  background-color   666  text-align center  font-family  Maven Pro  century gothic  arial  helvetica  sans-serif  padding-left  5px  padding-right  5px  border-radius  7px  font-size  18px   gt Advertising seems to be blocked by your browser  lt br gt  lt br gt  lt span style  font-size  12px   gt Please notice that advertising helps us to host the project  lt br gt  lt br gt If you find these ads intrusive or inappropriate  please contact me  lt  span gt  lt br gt  lt img src  http   www playonlinux com images abp png  alt  Adblock Plus  gt  lt  div gt         lt  script gt

User · Answer

async function hasAdBlock       try       await fetch  quot https   pagead2 googlesyndication com pagead js adsbygoogle js quot           method   quot HEAD quot         mode   quot no-cors quot              return false      catch e        return true

User · Answer

if you are using react with hooks   import React    useState  useEffect   from  react   const AdblockDetect        gt      const  usingAdblock  setUsingAdblock    useState false     let fakeAdBanner   useEffect      gt        if  fakeAdBanner          setUsingAdblock fakeAdBanner offsetHeight     0                if  usingAdblock     true        return null        return        lt div gt         lt div         ref  r   gt   fakeAdBanner   r           style    height   1px   width   1px   visibility   hidden   pointerEvents   none             className  adBanner          gt        Adblock       lt  div gt         export default AdblockDetect

User · Answer

I know there are already enough answers  but since this question comes up on Google searched for  detect adblock  at the topic  I wanted to provide some insight in case you re not using adsense   Specifically  with this example you can detect if the default Adblock-list provided by Firefox Adblock is used  It takes advantage that in this blocklist there is an element blocked with the CSS id  bottomAd  If I include such an element in the page and test for it s height  I know whether adblocking is active or not    lt  -- some code before -- gt   lt div id  bottomAd  style  font-size  2px   gt  amp nbsp  lt  div gt   lt  -- some code after -- gt    The rest is done via the usual jQuery suspect     document  ready  function       window setTimeout  function         var bottomad       bottomAd        if  bottomad length    1          if  bottomad height      0               adblocker active         else              no adblocker                          1       As can be seen  I m using setTimeout with at least a timeout of 1ms  I ve tested this on various browsers and most of the time  directly checking for the element in ready always returned 0  no matter whether the adblocker was active or not  I was having two ideas about this  either rendering wasn t yet done or Adblock didn t kick in yet  I didn t bother to investigate further

User · Answer

I noticed previous comments uses google adsense as object to test  Some pages don t uses adsense  and using adsense block as test is not really a good idea  Because adsense block may harm your SEO   Here is example how I detect by adblocker simple blocked class   Html    lt div class  ad-placement  id  ablockercheck  gt  lt  div gt   lt div id  ablockermsg  style  display  none  gt  lt  div gt    Jquery     document  ready function        if      ablockercheck   is   visible                  ablockermsg   text  Please disable adblocker    show                ablockercheck  is an ID which adblocker blocks  So checking it if it is visible you are able to detect if adblocker is turned On

[adsense] How to detect Adblock on my website?

Examples related to adblock

[adsense] How to detect Adblock on my website?

Examples related to adsense

Examples related to adblock