Mostrando entradas de septiembre, 2017

Focus ring

Have you ever noticed the little blue or dashed ring that appears around elements when you activate them with your keyboard or mouse? This is known as a focus indicator, and it's extremely important for users who rely primarily on their keyboard to navigate the screen. For a keyboard user, the focus indicator (or ""focus ring"") is kind of like their mouse pointer. It shows them which element is currently active and receiving keyboard events. Because the focus ring can show up on custom controls or whenever we add styles to native elements like the button tag, it's a common anti-pattern to remove the focus indicator using the CSS outline: none style. But doing this degrades the user experience for our keyboard users as they are no longer able to tell which elements are currently focused. Enter :focus-ring! The :focus-ring pseudo class is a new CSS selector designed to help differentiate between mouse and keyboard focus. Today on a11ycasts we'll look at h

Accesibildad de gráficos complejos

En  Charts & Accessibility  se ofrecen algunos consejos, con ejemplos, para crear gráficos accesibles: If the data in a chart, graph or map is crucial to the content of a Web page, then you must provide a text description of the image. In some cases, a numeric table replicating the chart data could provide additional accessibility. WCAG 2.0 Guideline 1.1.1—"All non-text content that is presented to the user has a text alternative that serves the equivalent purpose…" Supplement color-coding of charts with texture, differences in line style, text in graphs or different shades of color to improve accessibility for colorblind users. Charts should be readable in black and white. NOTE: The default settings of the Chart Wizard in Excel are not color accessible. Use the formatting tools to change line styles and colors. WCAG 2.0 Guideline 1.4.1—"Color is not used as the only visual means of conveying information, indicating an action, prompting a response, or distinguishing

WCAG 2.0 - Operable


WCAG 2.0 - Perceivable


CSS Speech

Interesante el artículo  Let’s Talk About Speech CSS : The CSS 3 Speech Module, the evolved version of the aural Media Type, looks the most promising. Like display: none;, it is part of the small subset of CSS that has an impact on screen reader behavior. It uses traditional CSS property/value pairings alongside existing declarations to create an audio experience that has parity with the visual box model. La realidad actual es que el soporte por parte de los productos de apoyo es muy reducido.

Uso de un magnificador de pantalla (2)


Uso de un magnificador de pantalla (1)