User Agent UseCases

Gathered all of the UseCases related to user agents I could find. If you
have more please comment in this message.

Jim

A blind employee who needs to search a specific entries in a photo gallery
or repository of charts can't, because most browsers do not search the
alternative text.

Employees using a keyboard cannot read all the content contained in a
<div> with overflow, because in most browsers, they cannot use the keyboard
to enter the box and cannot move the scrollbars. Even cursor browsing won't
enter that overflow box.

the default contrast of <option> in hover or focus state in <select> does
not meet WCAG, and is not styleable by the author.
there was a bug filed on chrome
https://code.google.com/p/chromium/issues/detail?can=2&q=476992&colspec=ID%20Pri%20M%20Week%20ReleaseBlock%20Cr%20Status%20Owner%20Summary%20OS%20Modified&id=476992

People with low vision can't customize the text so they can read it when
browsers eliminate user stylesheets.  Zoom is inadequate for people who
need to reduce space and heading sizes so the maximum amount of text
appears in their field of vision.

In most browsers, people with low vision can't print out a web page at the
size or customization they need.  These employees can't work without their
computer which limits their ability to do sales calls, or field service.

An employee reading a long document can't resize the text or resize the
window without losing their place, because browsers don't keep the point of
regard.

Users who want to read a tooltip from the keyboard can't in major browsers,
because the browsers don't provide tooltips on keyboard focus.  Elements
that can't get focus cannot display tooltips.  This requires authors to go
through a lot of work to meet WCAG requirements for keyboard access.

Placeholder text and disabled elements by default do not meet WCAG color
contrast requirements, so authors have to compensate to meet WCAG.

In additional, many web pages are designed to require a mouse. The browser
could provide alternative access for keyboard users, such as the ability to
tab to elements that have recognized scripted reactions to mouse input;
without this support the pages remain inaccessible to them. (As just one
example, this prevents keyboard users from paying their property taxes
online in at least one county.)

In at least one browser, the security status button next to the address can
be reached using the keyboard only by navigating BACKWARDS through the tab
order, which is not easily discoverable.

In at least one browser, toolbar buttons are not accessible from the
keyboard (both those built-in and those added by extensions).

In at least one browser, you cannot customize the selection and order of
toolbar buttons using the keyboard.

Most or all browsers interpret the HTML specification as telling them to
ignore styles that generate content for elements lacking content (e.g. IMG
elements). This prevents the user of style sheets to show alt text and
other properties.

Generated content may not be exposed to assistive technology through
platform API or the DOM, even though it appears to users indistinguishable
from other content and may be required to use the page.

As we discussed on last week's call, some users find that check boxes and
other controls in content do not scale up with font size, leaving them
difficult for some users to see or recognize.

At least one browser running on Windows for the desktop does not assign
shortcut keys to the controls in its dialog boxes, failing to comply with
platform UI guidelines or accessibility guidelines, and vastly increasing
the number of navigation and keystrokes required to perform tasks.

1) The ability to display captions is very inconsistent in media players on
mobile browsers. Most mobile browsers do not respect OS settings to display
captions and don't provide their own control to turn it on.


2) VW font attribute in CSS is inconsistently implemented in browsers
(especially mobile) and some browsers prevent text size from increasing on
zoom when the CSS attribute is set.


-- 
Jim Allan, Accessibility Coordinator
Texas School for the Blind and Visually Impaired
1100 W. 45th St., Austin, Texas 78756
voice 512.206.9315    fax: 512.206.9264  http://www.tsbvi.edu/
"We shape our tools and thereafter our tools shape us." McLuhan, 1964