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Mat Marquis,
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Accessibility11
Wednesday, October 12
Accessibility11
Wednesday, October 12
Why build accessible websites?
• Because we’re decent human beings.
• Why wouldn’t we?
• What are you, some kind of jerk?
• C’mon, man.
• C’mon.
Wednesday, October 12
Why build accessible websites?
• Because we’re decent human beings.
• Why wouldn’t we?
• What are you, some kind of jerk?
• C’mon, man.
• C’mon.
Wednesday, October 12
The power of the Web is in its universality. Access by everyone regardless of disability is an essential aspect.
Tim Berners-Lee
“
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Difficulty Seeinghttp://www.census.gov
Severe Difficulty Seeinghttp://www.census.gov
Internet Explorer 6http://www.ie6countdown.com 1.4%
3.4%
0.8%
Percentage of U.S. Population Suffering From:
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Difficulty Seeinghttp://www.census.gov
Severe Difficulty Seeinghttp://www.census.gov
Internet Explorer 6http://www.ie6countdown.com 1.4%
3.4%
0.8%
Percentage of U.S. Population Suffering From:
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Who is this for?
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Around 10 percent of the world’s population, or 650 million people, live with a disability. They are the world's largest minority.
The United Nationshttp://www.un.org/disabilities/default.asp?id=18
“
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Context
Wednesday, October 12
Context
Wednesday, October 12
Progressive Enhancement
Content First
HTML
CSS
WAI-ARIA
JavaScript
Wednesday, October 12
Progressive Enhancement
Content First
HTML
CSS
WAI-ARIA
JavaScript
Wednesday, October 12
Progressive Enhancement
Content First
HTML
CSS
WAI-ARIA
JavaScript
Wednesday, October 12
Progressive Enhancement
Content First
HTML
CSS
WAI-ARIA
JavaScript
Wednesday, October 12
Progressive Enhancement
Content First
HTML
CSS
WAI-ARIA
JavaScript
Wednesday, October 12
We need to make smarter content,not smarter containers.*
Stephanie Riegerhttp://twitter.com/stephanierieger
“
* We’re gonna make smarter containers, too.Wednesday, October 12
We need to make smarter content,not smarter containers.*
Stephanie Riegerhttp://twitter.com/stephanierieger
“
* We’re gonna make smarter containers, too.Wednesday, October 12
Semantic Markup
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0 100
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0 100
<input type="number" name="widget" min="0" max="100" value="0" />
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<label for="widget">Freeze-Ray Completion Percentage</label>
<input type="number" name="widget" id="widget"
min="0"
max="100"
value="80"
/>
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Freeze-Ray Completion Percentage
0
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<div class="slider"> <a href="#" class="slider-handle"></a></div>
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<div class="slider"> <a href="#" class="slider-handle" style="left: 80%;"></a></div>
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Freeze-Ray Completion Percentage
0
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0Freeze-Ray Completion Percentage
50
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<label for="widget">Freeze-Ray Completion Percentage</label><input type="number" name="widget" id="widget"
min="0"max="100"value="80"/>
<div class="slider"> <a href="#" class="slider-handle"></a></div>
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<label for="widget">Freeze-Ray Completion Percentage</label>
<input type="number" name="widget" id="widget"
min="0"
max="100"
value="80"
/>
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<div class="percent-slider">
<label for="widget">Freeze-Ray Completion Percentage</label>
<input type="number" name="widget" id="widget"
min="0"
max="100"
value="80"
/>
</div>
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.ui-slider label,
.ui-slider input {
position: absolute;
left: -9999px;
}
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<div class="percent-slider">
<label for="widget">Freeze-Ray Completion Percentage</label>
<input type="number" name="widget" id="widget"
min="0"
max="100"
value="80"
/>
</div>
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WAI-ARIA*
*Web Accessibility Initiative - Accessible Rich Internet ApplicationsWednesday, October 12
WAI-ARIA*
*Web Accessibility Initiative - Accessible Rich Internet ApplicationsWednesday, October 12
ARIA Attributes
landmark"banner" "main" "navigation"
role"slider" "tabs"
state"aria-expanded" "aria-checked"
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ARIA Attributes
landmark"banner" "main" "navigation"
role"slider" "tabs"
state"aria-expanded" "aria-checked"
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<div class="slider">
<a href="#" class="slider-handle" style="left: 80%;"></a>
</div>
“Number link.”
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<div role="application" class="percent-slider"> <a href="#" class="slider-handle" style="left: 80%;"
role="slider"aria-valuemin="0"aria-valuemax="100"aria-valuenow="80"aria-valuetext="80%"></a>
</div>
“Slider control: eighty percent. Use arrows to move handle.”
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<div role="application" class="percent-slider"> <a href="#" class="slider-handle" style="left: 80%;"
role="slider"aria-valuemin="0"aria-valuemax="100"aria-valuenow="80"aria-valuetext="80%"></a>
</div>
“Slider control: eighty percent. Use arrows to move handle.”
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AWESOME
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Resources
Designing with Progressive EnhancementBuilding the Web that Works for Everyone
http://wil.to/a11y/g
http://wil.to/a11y/
http://twitter.com/wilto
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