Skip to content

Instantly share code, notes, and snippets.

@benknight

benknight/before-unload-bookmarklet.md

Last active November 28, 2018 04:41
Show Gist options
  • Save benknight/13595bdd49a6b87c6d24 to your computer and use it in GitHub Desktop.
Save benknight/13595bdd49a6b87c6d24 to your computer and use it in GitHub Desktop.
Download ZIP
Before Unload Bookmarklet
Raw
before-unload-bookmarklet.md

Before Unload Bookmarklet

Clicking this bookmarklet on a browser tab will cause the above alert to display when you try to close it. Handy if you have work you really don't want to lose.

Raw
gistfile1.txt
javascript:window.addEventListener%28%22beforeunload%22%2C%20function%20%28e%29%20%7B%20var%20confirmationMessage%20%3D%20%22o/%22%3B%20%28e%20%7C%7C%20window.event%29.returnValue%20%3D%20confirmationMessage%3B%20return%20confirmationMessage%3B%20%7D%29%3B
@shmdhussain
Copy link

How to use this? Where i need to paste the code?

Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment