Friday, August 31st, 2007
Brian really gave the development of this jQuery plugin some good thought as attested by his overview of the functionality:
- Users with color vision deficiency, or color blindness
The plugin does not use color as a primary indicator of a change in state for the slider. Instead, the “previous” and “next” arrows are either visible or hidden, depending on the location of the news slider. There is also an indicator that communicates the total number of news stories in the slider.
- Users with limited or poor vision, but who do not use a screen reader
If the user chooses to resize the text via the browser file menu, the slider will flex vertically to accommodate the larger text, and still function. This is primarily a function of the CSS, and it is suggested you maintain a variable font size on your site in order to take advantage of this capability.
- Users that are legally blind, and who browse Web pages with a screen reader
Since screen readers actually read through the code, it is important that the XHTML be formatted free of confusion. The appropriate skip links and title tags have been included for navigation and messaging. The important thing to remember is that screen readers like JAWS ignore elements with the display property set to “none”, or with the visibility property set to “hidden”. This helps significantly in managing the presentation to several categories of disabled users.
- Users that browse with the keyboard and an adaptive device such as a mouth stick
When developing a Web component to be accessible, this is the most difficult group of disabled users to accommodate. If you have ever tried to browse by tabbing through a Web page, it can be frustrating. Although the core functionality of the news slider is partially accessible with a keyboard, the “View All” link was added as a catch-all mechanism.
Posted by Rey Bango at 7:00 am