4.1.1 Parsing (A)
Understanding 4.1.1 Parsing (A)
The code of the page must not cause browser or assistive technology conflicts. This ensures that content and functionality is presented in a way that works reliably across all supported browsers and assistive technologies.
Requirements / What to do?
- HTML code must conform to the standard identified in the doctype statement;
- ARIA code must conform to the rules for use with the host language (HTML).
Common mistakes
- HTML elements are not well formed (opened and closed properly);
- HTML elements include invalid attributes;
- HTML id attributes use duplicate values within the same page;
- ARIA attributes are invalid.