| accesskeys |
Ensures every accesskey attribute value is unique |
Serious |
best-practice, cat.keyboard |
true |
| area-alt |
Ensures <area> elements of image maps have alternate text |
Critical |
cat.text-alternatives, wcag2a, wcag111, section508, section508.22.a |
true |
| aria-allowed-attr |
Ensures ARIA attributes are allowed for an element's role |
Critical |
cat.aria, wcag2a, wcag412 |
true |
| aria-allowed-role |
Ensures role attribute has an appropriate value for the element |
Minor |
cat.aria, best-practice |
true |
| aria-dpub-role-fallback |
Ensures unsupported DPUB roles are only used on elements with implicit fallback roles |
Moderate |
cat.aria, wcag2a, wcag131 |
true |
| aria-hidden-body |
Ensures aria-hidden='true' is not present on the document body. |
Critical |
cat.aria, wcag2a, wcag412 |
true |
| aria-hidden-focus |
Ensures aria-hidden elements do not contain focusable elements |
Serious |
cat.name-role-value, wcag2a, wcag412, wcag131 |
true |
| aria-required-attr |
Ensures elements with ARIA roles have all required ARIA attributes |
Critical |
cat.aria, wcag2a, wcag412 |
true |
| aria-required-children |
Ensures elements with an ARIA role that require child roles contain them |
Critical |
cat.aria, wcag2a, wcag131 |
true |
| aria-required-parent |
Ensures elements with an ARIA role that require parent roles are contained by them |
Critical |
cat.aria, wcag2a, wcag131 |
true |
| aria-roles |
Ensures all elements with a role attribute use a valid value |
Serious, Critical |
cat.aria, wcag2a, wcag412 |
true |
| aria-valid-attr-value |
Ensures all ARIA attributes have valid values |
Critical |
cat.aria, wcag2a, wcag412 |
true |
| aria-valid-attr |
Ensures attributes that begin with aria- are valid ARIA attributes |
Critical |
cat.aria, wcag2a, wcag412 |
true |
| audio-caption |
Ensures <audio> elements have captions |
Critical |
cat.time-and-media, wcag2a, wcag121, section508, section508.22.a |
false |
| autocomplete-valid |
Ensure the autocomplete attribute is correct and suitable for the form field |
Serious |
cat.forms, wcag21aa, wcag135 |
true |
| avoid-inline-spacing |
Ensure that text spacing set through style attributes can be adjusted with custom stylesheets |
Serious |
wcag21, wcag1412 |
true |
| blink |
Ensures <blink> elements are not used |
Serious |
cat.time-and-media, wcag2a, wcag222, section508, section508.22.j |
true |
| button-name |
Ensures buttons have discernible text |
Serious, Critical |
cat.name-role-value, wcag2a, wcag412, section508, section508.22.a |
true |
| bypass |
Ensures each page has at least one mechanism for a user to bypass navigation and jump straight to the content |
Serious |
cat.keyboard, wcag2a, wcag241, section508, section508.22.o |
true |
| checkboxgroup |
Ensures related <input type="checkbox"> elements have a group and that the group designation is consistent |
Critical |
cat.forms, best-practice |
true |
| color-contrast |
Ensures the contrast between foreground and background colors meets WCAG 2 AA contrast ratio thresholds |
Serious |
cat.color, wcag2aa, wcag143 |
true |
| css-orientation-lock |
Ensures content is not locked to any specific display orientation, and the content is operable in all display orientations |
Serious |
cat.structure, wcag134, wcag21aa, experimental |
true |
| definition-list |
Ensures <dl> elements are structured correctly |
Serious |
cat.structure, wcag2a, wcag131 |
true |
| dlitem |
Ensures <dt> and <dd> elements are contained by a <dl> |
Serious |
cat.structure, wcag2a, wcag131 |
true |
| document-title |
Ensures each HTML document contains a non-empty <title> element |
Serious |
cat.text-alternatives, wcag2a, wcag242 |
true |
| duplicate-id-active |
Ensures every id attribute value of active elements is unique |
Serious |
cat.parsing, wcag2a, wcag411 |
true |
| duplicate-id-aria |
Ensures every id attribute value used in ARIA and in labels is unique |
Critical |
cat.parsing, wcag2a, wcag411 |
true |
| duplicate-id |
Ensures every id attribute value is unique |
Minor |
cat.parsing, wcag2a, wcag411 |
true |
| empty-heading |
Ensures headings have discernible text |
Minor |
cat.name-role-value, best-practice |
true |
| focus-order-semantics |
Ensures elements in the focus order have an appropriate role |
Minor |
cat.keyboard, best-practice, experimental |
true |
| form-field-multiple-labels |
Ensures form field does not have multiple label elements |
Moderate |
cat.forms, wcag2a, wcag332 |
true |
| frame-tested |
Ensures <iframe> and <frame> elements contain the axe-core script |
Critical |
cat.structure, review-item, best-practice |
true |
| frame-title-unique |
Ensures <iframe> and <frame> elements contain a unique title attribute |
Serious |
cat.text-alternatives, best-practice |
true |
| frame-title |
Ensures <iframe> and <frame> elements contain a non-empty title attribute |
Serious |
cat.text-alternatives, wcag2a, wcag241, wcag412, section508, section508.22.i |
true |
| heading-order |
Ensures the order of headings is semantically correct |
Moderate |
cat.semantics, best-practice |
true |
| hidden-content |
Informs users about hidden content. |
Minor |
cat.structure, experimental, review-item, best-practice |
true |
| html-has-lang |
Ensures every HTML document has a lang attribute |
Serious |
cat.language, wcag2a, wcag311 |
true |
| html-lang-valid |
Ensures the lang attribute of the <html> element has a valid value |
Serious |
cat.language, wcag2a, wcag311 |
true |
| html-xml-lang-mismatch |
Ensure that HTML elements with both valid lang and xml:lang attributes agree on the base language of the page |
Moderate |
cat.language, wcag2a, wcag311 |
true |
| identical-links-same-purpose |
Ensures that links with identical accessible names resolve to the same resource |
Minor |
wcag2aaa, wcag249, experimental |
true |
| image-alt |
Ensures <img> elements have alternate text or a role of none or presentation |
Critical |
cat.text-alternatives, wcag2a, wcag111, section508, section508.22.a |
true |
| image-redundant-alt |
Ensure button and link text is not repeated as image alternative |
Minor |
cat.text-alternatives, best-practice |
true |
| input-image-alt |
Ensures <input type="image"> elements have alternate text |
Critical |
cat.text-alternatives, wcag2a, wcag111, section508, section508.22.a |
true |
| label-content-name-mismatch |
Ensures that elements labelled through their content must have their visible text as part of their accessible name |
Serious |
wcag21a, wcag253, experimental |
true |
| label-title-only |
Ensures that every form element is not solely labeled using the title or aria-describedby attributes |
Serious |
cat.forms, best-practice |
true |
| label |
Ensures every form element has a label |
Minor, Critical |
cat.forms, wcag2a, wcag332, wcag131, section508, section508.22.n |
true |
| landmark-banner-is-top-level |
Ensures the banner landmark is at top level |
Moderate |
cat.semantics, best-practice |
true |
| landmark-complementary-is-top-level |
Ensures the complementary landmark or aside is at top level |
Moderate |
cat.semantics, best-practice |
true |
| landmark-contentinfo-is-top-level |
Ensures the contentinfo landmark is at top level |
Moderate |
cat.semantics, best-practice |
true |
| landmark-main-is-top-level |
Ensures the main landmark is at top level |
Moderate |
cat.semantics, best-practice |
true |
| landmark-no-duplicate-banner |
Ensures the document has at most one banner landmark |
Moderate |
cat.semantics, best-practice |
true |
| landmark-no-duplicate-contentinfo |
Ensures the document has at most one contentinfo landmark |
Moderate |
cat.semantics, best-practice |
true |
| landmark-one-main |
Ensures the document has only one main landmark and each iframe in the page has at most one main landmark |
Moderate |
cat.semantics, best-practice |
true |
| layout-table |
Ensures presentational <table> elements do not use <th>, <caption> elements or the summary attribute |
Serious |
cat.semantics, wcag2a, wcag131 |
true |
| link-in-text-block |
Links can be distinguished without relying on color |
Serious |
cat.color, experimental, wcag2a, wcag141 |
true |
| link-name |
Ensures links have discernible text |
Serious |
cat.name-role-value, wcag2a, wcag412, wcag244, section508, section508.22.a |
true |
| list |
Ensures that lists are structured correctly |
Serious |
cat.structure, wcag2a, wcag131 |
true |
| listitem |
Ensures <li> elements are used semantically |
Serious |
cat.structure, wcag2a, wcag131 |
true |
| marquee |
Ensures <marquee> elements are not used |
Serious |
cat.parsing, wcag2a, wcag222 |
true |
| meta-refresh |
Ensures <meta http-equiv="refresh"> is not used |
Critical |
cat.time, wcag2a, wcag2aaa, wcag221, wcag224, wcag325 |
true |
| meta-viewport-large |
Ensures <meta name="viewport"> can scale a significant amount |
Minor |
cat.sensory-and-visual-cues, best-practice |
true |
| meta-viewport |
Ensures <meta name="viewport"> does not disable text scaling and zooming |
Critical |
cat.sensory-and-visual-cues, wcag2aa, wcag144 |
true |
| object-alt |
Ensures <object> elements have alternate text |
Serious |
cat.text-alternatives, wcag2a, wcag111, section508, section508.22.a |
true |
| p-as-heading |
Ensure p elements are not used to style headings |
Serious |
cat.semantics, wcag2a, wcag131, experimental |
true |
| page-has-heading-one |
Ensure that the page, or at least one of its frames contains a level-one heading |
Moderate |
cat.semantics, best-practice |
true |
| radiogroup |
Ensures related <input type="radio"> elements have a group and that the group designation is consistent |
Critical |
cat.forms, best-practice |
true |
| region |
Ensures all page content is contained by landmarks |
Moderate |
cat.keyboard, best-practice |
true |
| role-img-alt |
Ensures [role='img'] elements have alternate text |
Serious |
cat.text-alternatives, wcag2a, wcag111, section508, section508.22.a |
true |
| scope-attr-valid |
Ensures the scope attribute is used correctly on tables |
Moderate, Critical |
cat.tables, best-practice |
true |
| scrollable-region-focusable |
Elements that have scrollable content should be accessible by keyboard |
Moderate |
wcag2a, wcag211 |
true |
| server-side-image-map |
Ensures that server-side image maps are not used |
Minor |
cat.text-alternatives, wcag2a, wcag211, section508, section508.22.f |
true |
| skip-link |
Ensure all skip links have a focusable target |
Moderate |
cat.keyboard, best-practice |
true |
| tabindex |
Ensures tabindex attribute values are not greater than 0 |
Serious |
cat.keyboard, best-practice |
true |
| table-duplicate-name |
Ensure that tables do not have the same summary and caption |
Minor |
cat.tables, best-practice |
true |
| table-fake-caption |
Ensure that tables with a caption use the <caption> element. |
Serious |
cat.tables, experimental, wcag2a, wcag131, section508, section508.22.g |
true |
| td-has-header |
Ensure that each non-empty data cell in a large table has one or more table headers |
Critical |
cat.tables, experimental, wcag2a, wcag131, section508, section508.22.g |
true |
| td-headers-attr |
Ensure that each cell in a table using the headers refers to another cell in that table |
Serious |
cat.tables, wcag2a, wcag131, section508, section508.22.g |
true |
| th-has-data-cells |
Ensure that each table header in a data table refers to data cells |
Serious |
cat.tables, wcag2a, wcag131, section508, section508.22.g |
true |
| valid-lang |
Ensures lang attributes have valid values |
Serious |
cat.language, wcag2aa, wcag312 |
true |
| video-caption |
Ensures <video> elements have captions |
Critical |
cat.text-alternatives, wcag2a, wcag122, section508, section508.22.a |
true |
| video-description |
Ensures <video> elements have audio descriptions |
Critical |
cat.text-alternatives, wcag2aa, wcag125, section508, section508.22.b |
true |