Goal
- Prevent content reproduction errors and interaction errors via scripts.
- Limit the risk of random interpretation of the Document Object Model (DOM) by different user agents.
- Improve the accessibility of content for people with disabilities.
Implementation
The most drastic solution is to ensure the complete validity of the source code of the pages, using a validator such as http://validator.w3.org. However, this solution leads to taking account of all the source code validation errors which do not fall within the scope of this best practice. To keep to the scope of this best practice, take care to avoid any duplicate value of an
id attribute in the same HTML page.Find out more:
Control
Submit the page to the W3C HTML validator (validator.w3.org) or other code validation tool and verify that each
id attribute value is unique within the page.Discover Opquast training and certification
The objective of these rules and the Opquast community mission is ‘making the web better’ for your customers and for everyone! Opquast rules cover the key major areas of risk that can negatively affect website users such as privacy, ecodesign, accessibility and security.
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