Rocket Validator integrates axe-core version 4.4, into an automated web site scanner.
Ensures <frame> and <iframe> elements with focusable content do not have tabindex=-1
%lt;iframe%gt;elements with focusable content must not have
When a frame has a negative tabindex, the browser is prevented from redirecting the focus to the content inside that frame. This causes all its content from getting skipped in keyboard navigation, and if the frame is scrollable also prevents the focus from reaching any element from which the frame can be scrolled with the keyboard.
Other WCAG: 2.1.1 accessibility rules checked by Rocket Validator
The document contains an image map that is server-side instead of client-side.
Server-side image maps are not keyboard accessible; mouse clicks are required to access the links contained in the image, making the image inaccessible to people who only use keyboards for their navigation.
Server side image maps pass the coordinates of the mouse click to the server-side script used to process the image map. Because they rely on mouse clicks, they are not keyboard accessible, whereas client-side image maps are keyboard accessible. Further, it is not possible to provide text alternatives to the actionable areas of a server-side image map like you can with the
areas of a client-side image map.
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