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Re: Comments on the discussion about target size and accidental activation (was Re: Minutes: AGWG meeting April 4, 2017)

From: Alastair Campbell <acampbell@nomensa.com>
Date: Wed, 5 Apr 2017 08:30:50 +0000
To: Gregg C Vanderheiden <greggvan@umd.edu>
CC: "w3c-waI-gl@w3. org" <w3c-wai-gl@w3.org>
Message-ID: <B1E4E032-838A-4FAB-90EF-89C377A83119@nomensa.com>
Gregg wrote:

> sounds very HTML Specific……

It does sound that way, but I’d say it is browser-specific.

Just to follow the logic:

·         Any content shown in a “web page” (our unit of testing) must be shown in a browser, or be capable of being shown in a browser, therefore you can test it in a browser.

·         Anything shown in a browser has to be rendered by a browser.

·         Anything rendered in a browser is translated into CSS pixels, or can be compared to CSS pixels.

So given the variety of hardware pixel densities, using CSS pixels as a unit of size measurement is the most robust way across devices, even for plugins like Flash/Silverlight. The worst-case scenario is that you compare the size of something in a plugin black-box to HTML content next to it, or in another browser window.

On a related note, are we worried about plugins for 2.1? Given that browsers are deprecating them [1], by mid-2018 they might be a non-issue. It is getting to the point where companies are having to pay people to enable plugins [2].



1] https://arstechnica.co.uk/information-technology/2016/08/chrome-starts-retiring-flash-in-favour-of-html5/

“with Chrome 55 in December [2016], Flash will be deprecated entirely, with exceptions for "sites which only support Flash." In both cases HTML5 is expected to take up the reins”

2] http://www.theverge.com/2017/3/24/15052286/fedex-adobe-flash-five-dollar-discount-print-orders

“The world’s most hated plugin is clinging on thanks to a generous $5 discount offer from FedEx, which apparently desperately needs customers to reenable Adobe Flash to be able to print things from its website”
Received on Wednesday, 5 April 2017 08:31:26 UTC

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