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Re: [presentation-api] Check on Presentation display availability in getAvailability can never be true

From: Mark Foltz via GitHub <sysbot+gh@w3.org>
Date: Mon, 05 Dec 2016 19:52:52 +0000
To: public-secondscreen@w3.org
Message-ID: <issue_comment.created-264958260-1480967570-sysbot+gh@w3.org>
Okay, I am starting to understand what you are getting at.  Thanks for
 your patience.

The question is whether the availability promise/object is tied to the
 lifetime of the request that created them, which means they are 
created once and only once.  Or, if they can be GCed independently 
from the request and recreated later.

I believe the intention is that the developer can use the lifetime of 
the availability object to control when the browser is engaged in 
continuous monitoring of displays, and responsible usage would discard
 the object when the site isn't offering a UX to start presentation.

We didn't add a specific `discard()` or `dispose()` API for this; that
 doesn't seem to be a common Web idiom.

Unless we go that route, GC should be able to discard the availability
 object/promise independent of the request, and in that case, we would
 need to recreate them if getAvailability() is called again.

@schien Does that make sense?  Any other input?





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Received on Monday, 5 December 2016 19:53:12 UTC

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