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Principios y pautas de WCAG 2.1 (en inglés)
Principles: At the top are four principles that provide the foundation for Web accessibility:
perceivable, operable, understandable, and robust.
Guidelines: Under the principles are guidelines.
The 13 guidelines provide the basic goals that authors should work toward in order to
make content more accessible to users with different disabilities.
The guidelines are not testable, but provide the framework and overall objectives to help authors understand
the success criteria and better implement the techniques.
- Principle 1: Perceivable - Information and user interface components must be presentable to users in ways they can perceive.
- Guideline 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.
- Guideline 1.2 Time-based Media: Provide alternatives for time-based media.
- Guideline 1.3 Adaptable: Create content that can be presented in different ways (for example simpler layout) without losing information or structure.
- Guideline 1.4 Distinguishable: Make it easier for users to see and hear content including separating foreground from background.
- Principle 2: Operable - User interface components and navigation must be operable.
- Guideline 2.1 Keyboard Accessible: Make all functionality available from a keyboard.
- Guideline 2.2 Enough Time: Provide users enough time to read and use content.
- Guideline 2.3 Seizures and Physical Reactions: Do not design content in a way that is known to cause seizures or physical reactions.
- Guideline 2.4 Navigable: Provide ways to help users navigate, find content, and determine where they are.
- Guideline 2.5 Input Modalities: Make it easier for users to operate functionality through various inputs beyond keyboard.
- Principle 3: Understandable - Information and the operation of user interface must be understandable.
- Guideline 3.1 Readable: Make text content readable and understandable.
- Guideline 3.2 Predictable: Make Web pages appear and operate in predictable ways.
- Guideline 3.3 Input Assistance: Help users avoid and correct mistakes.
- Principle 4: Content must be robust enough that it can be interpreted by a wide variety of user agents, including assistive technologies.
- Guideline 4.1 Compatible: Maximize compatibility with current and future user agents, including assistive technologies.
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