Javascript : Detect when console is activated and do something about it


You do not want your website visitors to see what is behind the curtain of your website. You want your web page to have the ability to detect whenever a user activates the browser's console(DevTools, Firebug, etc ) and do something about it. Such as redirect the user to a new page, troll the user or prompt the user not to peek behind the curtain.


This JavaScript code is a cross browser's solution that will detect if a user activates the console or dev tool inspector. Upon detection, it will redirect the user to another page /nopeeking.php.

 window.onresize = function(){
 if ((window.outerHeight - window.innerHeight) > 100) {
 window.location = "/nopeeking.php"; // or whatever action you want to happen upon console activation detection.

NOTE: This is one of the methods that you can use to troll the users(crackers) that attempt to peek/temper with your web page JavaScript. Check out the JavaScript obfuscator at as well.

Use to inject anti-console, obfuscate your code and anti-debugger to frustrate the would-be cracker. These are a couple of ways that you can deploy to stop the cracker/reverse-engineer from debugging your web app.

  See also : Javascript : Put image into Chrome browser's console

By Adam Ng

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