"onbeforeunload" | Can I use... Support tables for HTML5, CSS3, etc

Can I use

Search

?

0 results found.

Browser support tables for modern web technologies

Created & maintained by @Fyrd, design by @Lensco.

Support data contributions by the GitHub community.

Usage share statistics by StatCounter GlobalStats for February, 2026

Location detection provided by ipinfo.io.

Browser testing done via

Become a caniuse Patron to support the site and disable ads for only $1/month!

Legend