Images must have alternative text

Ensure <img> elements have alternative text or a role of none or presentation

Documents must have <title> element to aid in navigation

Ensure each HTML document contains a non-empty <title> element

Heading levels should only increase by one

Ensure the order of headings is semantically correct

Document should have one main landmark

Ensure the document has a main landmark

All page content should be contained by landmarks

Ensure all page content is contained by landmarks

All page content should be contained by landmarks

Ensure all page content is contained by landmarks

All page content should be contained by landmarks

Ensure all page content is contained by landmarks