For all user interface components (including but not limited to: form elements, links and components generated by scripts), the name and role can be programmatically determined ; states, properties, and values that can be set by the user can be programmatically set ; and notification of changes to these items is available to user agents, including assistive technologies. (Level A)
WCAG 2.0 All Guidelines
4.1.1: Parsing: (A)
In content implemented using markup languages, elements have complete start and end tags, elements are nested according to their specifications, elements do not contain duplicate attributes, and any IDs are unique, except where the specifications allow these features. (Level A)
4.1 :Compatible:
Maximize compatibility with current and future user agents, including assistive technologies.
Advisory Techniques for Guideline 4.1
- Avoiding deprecated features of W3C technologies
4.0: Principle 4: Robust
Content must be robust enough that it can be interpreted reliably by a wide variety of user agents, including assistive technologies.
3.3.6:Error Prevention (All): (AAA)
For Web pages that require the user to submit information, at least one of the following is true: (Level AAA)
- 1.Reversible: Submissions are reversible.
3.3.5: Help: (AAA)
Context-sensitive help is available. (Level AAA)
Sufficient Techniques for 3.3.5 – Help
Situation A: If a form requires text input:
- 1.G71: Providing a help link on every Web page
3.3.4: Error Prevention (Legal, Financial, Data): (AA)
For Web pages that cause legal commitments or financial transactions for the user to occur, that modify or delete user-controllable data in data storage systems, or that submit user test responses, at least one of the following is true: (Level AA)
3.3.3: Error Suggestion: (AA)
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)
3.3.2: Labels or Instructions: (A)
Labels or instructions are provided when content requires user input. (Level A)
Sufficient Techniques for 3.3.2 – Labels or Instructions
- 1.G131: Providing descriptive labels AND one of the following:
3.3.1: Error Identification: (A)
If an input error is automatically detected, the item that is in error is identified and the error is described to the user in text. (Level A)