Understandable

These articles provide practical advice on how to write your web content so that it conforms to the success criteria outlined in the Understandable principle of the Web Content Accessibility Guidelines (WCAG) 2.0 and 2.1. Understandable states that information and the operation of user interface must be understandable.

WCAG Success Criterion for Understandable Principle

Easy to understand Information and the operation of a user interface must be understandable: Users must be able to understand the information as well as the operation of the user interface. Under this principle you will find guidelines relating but not limited to: Readable: Make text content readable and understandable. Predictable: Make Web pages appear and …

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WCAG – 3.1.2 Language of Parts (Level AA)

3.1.2 Language of Parts: The human language of each passage or phrase in the content can be programmatically determined except for proper names, technical terms, words of indeterminate language, and words or phrases that have become part of the vernacular of the immediately surrounding text. (Level AA) Requirements Content that is written in a different …

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WCAG – 3.2.3 Consistent Navigation (Level AA)

3.2.3 Consistent Navigation: Navigational mechanisms that are repeated on multiple Web pages within a set of Web pages occur in the same relative order each time they are repeated, unless a change is initiated by the user. (Level AA) Requirements Navigational items that are repeated on multiple pages of a website (e.g. Search field, social …

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WCAG – 3.2.4 Consistent Identification (Level AA)

3.2.4 Consistent Identification: Components that have the same functionality within a set of Web pages are identified consistently. (Level AA) This applies to native apps by replacing “Web pages” with “screens”. Requirements When the same user interface components, with the same functionality, are used in multiple places, they must be identified in a consistent way. …

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WCAG – 3.3.2 Labels or Instructions (Level A)

3.3.2 Labels or Instructions: Labels or instructions are provided when content requires user input. (Level A) Requirements Labels All labels in a form clearly and precisely describe the data required from users; Radio buttons and checkboxes are correctly grouped and associated with a group label. Required fields Fields that are mandatory are clearly indicated (for …

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WCAG – 3.3.3 Error Suggestion (Level AA)

3.3.3 Error Suggestion: If an input error is automatically detected and suggestions for correction are known, then the suggestions are provided to the user, unless it would jeopardize the security or purpose of the content. (Level AA) Requirements When a form validation error is detected, a suggestion is provided to help the user correct the …

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