WebAIM: Quick Reference – Web Accessibility Principles

Quick Reference
Web Accessibility Principles

Article Contents

  • Principles
  • Alternative Text
  • Readability
  • Content Navigation
  • Data Tables
  • Color
  • Forms
  • Links and Buttons
  • Multimedia
  • Documents
  • Miscellaneous
  • Principles

    Accessibility guidelines and techniques are based on four core principles:

    • Perceivable – Available through sight, hearing, or touch.
    • Operable – Compatible with keyboard or mouse.
    • Understandable – Easy to comprehend.
    • Robust – Works across browsers, assistive technologies, mobile devices, old devices/browsers, etc. Follows standards.


    Alternative Text

    • Every non-text element needs a text equivalent (often conveyed in the alt attribute) to provide an alternative to the image content.
    • The alt attribute should present the content and function of an image, but not necessarily a detailed [...]

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