Summary: Authors can declare in their addEventListener call that the listener will not be calling preventDefault() on the event. This unlocks certain performance optimizations.
Bug: https://bugzilla.mozilla.org/show_bug.cgi?id=1266066 Link to standard: https://dom.spec.whatwg.org/#dom-addeventlisteneroptions-passive - note that this intent email is specifically about the "passive" flag; the AddEventListenerOptions dictionary and addEventListener modifications were already implemented in bug 1266194. I don't recall seeing an intent email for that but maybe I missed it. There is also an explainer doc at https://github.com/WICG/EventListenerOptions which might be easier to read for those already familiar with DOM events. Platform coverage: all platforms Estimated or target release: Hoping to get it in Firefox 49. I wrote the patches today (they were pretty small) hence combining the intent to implement and ship into this email rather than sending two separate emails. Preference behind which this will be implemented: none at the moment Other browsers: See https://github.com/WICG/EventListenerOptions#status-of-implementations _______________________________________________ dev-platform mailing list dev-platform@lists.mozilla.org https://lists.mozilla.org/listinfo/dev-platform
