Re: [whatwg] DOM Events Proposal: EventListenerOptions 'mayCancel' for improved scroll performance

On Thu, Jul 9, 2015 at 6:40 PM, Boris Zbarsky <bzbarsky@mit.edu> wrote:
> On 7/9/15 8:42 AM, Philip Jägenstedt wrote:
>>
>> Would there be any way to feature detect support for EventListenerOptions
>> as the third
>> argument?
>
>
> Yes.  You call addEventListener and pass an object that has getters for the
> properties you care about detecting.  If those getters get invoked, the
> browser knows about those dictionary properties.

Ah, that's cool :)

Philip