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javascriptmicrosoft-edgebookmarklet

why does window.open(''); usually work as expected; but sometimes fails?

My Test Case:

  • I browse to a webpage;
  • open DevTools console;
  • and execute windows.open('');

it usually works fine and I get a new blank window.

But if I browse to [NSFW] spankbang.com and do the same; it fails.

1-2yrs ago I wrote a bookmarklet for YouTube. It grabs <meta> tags and <script type="application/json"> blocks and dumps them to a blank page. It has worked great on YouTube and a ton of other sites. But, today I tried using it on [NSFW] spankbang.com and it fails!

This is on Windows 10 Pro using Edge.

Solution

  • because they delete the open fonction at this website

    // the open fonction are deleted
delete window.open
// throw error
window.open('')

    and you can get it back like this

    console.log(typeof window.open); // "function"
delete window.open;
console.log(typeof window.open); // "undefined"

//  "insert an iframe into DOM, to take window.open from its contentWindow"
var iframe = document.createElement("iframe");
document.body.appendChild(iframe);
window.open = iframe.contentWindow.open;
console.log(typeof window.open); // "function"
// it work now!
window.open('')

    and dont post adulte link here