Tìm kiếm hỗ trợ

Tránh các lừa đảo về hỗ trợ. Chúng tôi sẽ không bao giờ yêu cầu bạn gọi hoặc nhắn tin đến số điện thoại hoặc chia sẻ thông tin cá nhân. Vui lòng báo cáo hoạt động đáng ngờ bằng cách sử dụng tùy chọn "Báo cáo lạm dụng".

Learn More

no way to disable the javascript window.onbeforeunload()

  • 5 trả lời
  • 35 gặp vấn đề này
  • 13 lượt xem
  • Trả lời mới nhất được viết bởi alecail

more options

Firefox has given the options for the user to control how certain javascript functions can be used. I came across a horrible use of window.onbeforeunload() which keeps firefox from closing a tab, and therefore also quiting. A manual kill is required to close a page with the following code: (just open in firefox to test)

<title>test</title><script type="text/javascript">window.onbeforeunload=function(){return 'PRESS ESCAPE OR CLOSE THIS ALERT\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n';}</script>

It would be great if I could disable this javascript code, just like I can with window move/resize, raise/lower, hide statusbar, etc..

Firefox has given the options for the user to control how certain javascript functions can be used. I came across a horrible use of window.onbeforeunload() which keeps firefox from closing a tab, and therefore also quiting. A manual kill is required to close a page with the following code: (just open in firefox to test) <html> <head> <html><title>test</title><head><script type='text/javascript'>window.onbeforeunload=function(){return 'PRESS ESCAPE OR CLOSE THIS ALERT\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n';}</script></body></html> It would be great if I could disable this javascript code, just like I can with window move/resize, raise/lower, hide statusbar, etc..

Tất cả các câu trả lời (5)

more options

I have the same problem. This script attaches to random web pages, then will not allow me to close the page. I have to use Task Manager to kill Firefox.

window.onbeforeunload=function(){return 'PRESS ESCAPE OR CLOSE THIS ALERT\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\

more options

Same reply as above.

Được chỉnh sửa bởi jhathaway vào

more options

You can either disable JavaScript temporarily (Tools > Options > Content) or use a bookmarklet like this:

javascript:void(window.onbeforeunload=null);
more options

The only solution I've found that works correctly cross-browser is javascript:window.onbeforeunload=null;

more options

First, install GreaseMonkey: https://addons.mozilla.org/en-US/firefox/addon/greasemonkey/

Then, create a new user script for all pages, or for the specific website; the script itself is very simple, it's just this line:

window.onbeforeunload=null;


It's just overriding the annoying function called at the time the page is closed, with an empty function. That's all. In some cases, it may not work if some script inside the page is modifying the DOM after the page is loaded. Have fun!