Passive event listeners

Expose "passive" boolean in the EventListenerOptions dictionary. Implement the behaviour with respect to dispatching passive EventListeners so that calling preventDefault inside executing the passive registered callback only generates a warning to the console. Can be used to dramatically improve scrolling performance.

Demo

• https://rbyers.github.io/scroll-latency.html

Documentation

• https://github.com/RByers/EventListenerOptions/blob/gh-pages/explainer.md

Specification

Editor's draft

Status in Chromium

Blink components: Blink

Enabled by default (tracking bug) in:

• Chrome for desktop release 51
• Chrome for Android release 51
• Chrome for iOS release 51
• Android WebView release 51
• Opera release 38
• Opera for Android release 38

Consensus & Standardization

• Firefox: Shipped
• Edge: Mixed public signals
• Safari: Shipped
• Web Developers: Positive

Owners

• dtapuska@chromium.org
• rbyers@chromium.org

Last updated on 2017-06-14