a11yTips — Overview






Information and user interface components must be presentable to users in ways they can perceive. This means that users must be able to perceive the information being presented (it can’t be invisible to all of their senses).

1.1 Text Alternatives

Provide text alternatives for any non-text content so that it can be changed into other forms people need, such as large print, braille, speech, symbols or simpler language.

Make sure visual contents such as images and graphics come with alternate text-based descriptions that can be reliably conveyed and interpreted by assistive technologies such as screen readers.

1.1.1 Non-text Content

  • 2014/04/29: Turn purely decorative images in PDF documents into artifacts
  • 2014/04/28: Provide meaningful text alternatives for images in PDF documents
  • 2014/04/17: Include decorative images using CSS
  • 2014/04/10: Provide alternate CAPTCHAs in the form of logic tests
  • 2014/04/09: Provide alternate audio CAPTCHAs to support visual CAPTCHA tasks
  • 2014/04/08: Provide a text alternative describing the purpose of the CAPTCHA
  • 2014/03/02: Provide ALT attributes on images used as submit buttons
  • 2014/02/24: Provide long descriptions for complex images using longdesc
  • 2014/02/23: Bind complex images to long descriptions using aria-describedby
  • 2014/02/22: State the presence of long descriptions from complex images
  • 2014/02/21: Provide adjacent long descriptions for complex images
  • 2014/02/18: Provide long descriptions for complex images in a remote location
  • 2014/02/17: [...]

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