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Easy Checks

From: Gregg Vanderheiden <gregg@raisingthefloor.org>
Date: Thu, 30 Jul 2015 10:43:05 -0500
Message-Id: <0E6C1EEC-119C-4E17-B79E-67AC6583E67A@raisingthefloor.org>
To: Judy Brewer <jbrewer@w3.org>, Shawn Henry <shawn@w3.org>, wai-eo-editors@w3.org
this is a great resource !

one thing missing though is Flash.   
Kind of significant.

Your quick check could be 


Flash
People with photosensitive seizure disorders can have a seizure triggered if the web content flashes at them. This is only a problem if 1) the flashing is bright enough 2) it covers a large enough area of the screen, and 3) it flashes more than three times in any one second period.    

A quick check for this problem is 
see if any content on the screen is flashing more than three times in any one second period.  
If nothing flashes more than 3 times in one second,   then you PASS.  No further testing is needed.    You are DONE.
If YES -  (something IS flashing more than three times in any one second period) then:
set you screen to 1024 x 768 and see if the (3+ per second) flashing is smaller than a box that is 1/3  the height and 1/4 the width of the screen.   
If Smaller - (3x flashing is smaller than this box)   you also PASS. No further testing is needed.  You are DONE.   
if Larger - (3x flashing is larger than the box) - it may still pass, but you will need to do some calculations or use the free tool.  Start by retesting using the exact box size (341pixels by 256 pixels). If it doesn’t pass that then see http://www.w3.org/TR/UNDERSTANDING-WCAG20/seizure-does-not-violate.html <http://www.w3.org/TR/UNDERSTANDING-WCAG20/seizure-does-not-violate.html> for precise criteria and a link to the free tool. 


gregg

----------------------------------
Gregg Vanderheiden
gregg@raisingthefloor.org <mailto:gregg@raisingthefloor.org>





Received on Thursday, 30 July 2015 15:43:36 UTC

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