知乎 - 有问题，就会有答案

ARIA roles used must conform to valid values

Ensure all elements with a role attribute use a valid value

ARIA attributes must conform to valid names

Ensure attributes that begin with aria- are valid ARIA attributes

Buttons must have discernible text

Ensure buttons have discernible text

Buttons must have discernible text

Ensure buttons have discernible text

Buttons must have discernible text

Ensure buttons have discernible text

Buttons must have discernible text

Ensure buttons have discernible text

Buttons must have discernible text

Ensure buttons have discernible text

Images must have alternative text

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

Zooming and scaling must not be disabled

Ensure <meta name="viewport"> does not disable text scaling and zooming

Page should contain a level-one heading

Ensure that the page, or at least one of its frames contains a level-one heading

All page content should be contained by landmarks

Ensure all page content is contained by landmarks