Products Web 1. CSS Triggers How do you know if a CSS property is going to cause you performance problems? Looks like Paul has an answer he's desperate to tell Jake. Don't miss Jake's bizarre revelation about keyboard design! Read more CSS Triggers Except as otherwise noted, the content of this page is licensed under the Creative Commons Attribution 3.0 License, and code samples are licensed under the Apache 2.0 License. For details, see our Site Policies. Java is a registered trademark of Oracle and/or its affiliates. Last updated February 9, 2017.