# Rule Descriptions ## Table of Contents - [WCAG 2.0 Level A & AA Rules](#wcag-20-level-a--aa-rules) - [WCAG 2.1 Level A & AA Rules](#wcag-21-level-a--aa-rules) - [WCAG 2.2 Level A & AA Rules](#wcag-22-level-a--aa-rules) - [Best Practices Rules](#best-practices-rules) - [WCAG 2.x level AAA rules](#wcag-2x-level-aaa-rules) - [Experimental Rules](#experimental-rules) - [Deprecated Rules](#deprecated-rules) ## WCAG 2.0 Level A & AA Rules | Rule ID | Description | Impact | Tags | Issue Type | ACT Rules | | :------------------------------------------------------------------------------------------------------------------------------- | :---------------------------------------------------------------------------------------------------------------------------------------------------- | :------- | :--------------------------------------------------------------------------------------------------------------------------------- | :------------------------- | :----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | [area-alt](https://dequeuniversity.com/rules/axe/4.9/area-alt?application=RuleDescription) | Ensures <area> elements of image maps have alternate text | Critical | cat.text-alternatives, wcag2a, wcag244, wcag412, section508, section508.22.a, TTv5, TT6.a, EN-301-549, EN-9.2.4.4, EN-9.4.1.2, ACT | failure, needs review | [c487ae](https://act-rules.github.io/rules/c487ae) | | [aria-allowed-attr](https://dequeuniversity.com/rules/axe/4.9/aria-allowed-attr?application=RuleDescription) | Ensures an element's role supports its ARIA attributes | Critical | cat.aria, wcag2a, wcag412, EN-301-549, EN-9.4.1.2 | failure, needs review | [5c01ea](https://act-rules.github.io/rules/5c01ea) | | [aria-braille-equivalent](https://dequeuniversity.com/rules/axe/4.9/aria-braille-equivalent?application=RuleDescription) | Ensure aria-braillelabel and aria-brailleroledescription have a non-braille equivalent | Serious | cat.aria, wcag2a, wcag412, EN-301-549, EN-9.4.1.2 | needs review | | | [aria-command-name](https://dequeuniversity.com/rules/axe/4.9/aria-command-name?application=RuleDescription) | Ensures every ARIA button, link and menuitem has an accessible name | Serious | cat.aria, wcag2a, wcag412, TTv5, TT6.a, EN-301-549, EN-9.4.1.2, ACT | failure, needs review | [97a4e1](https://act-rules.github.io/rules/97a4e1) | | [aria-conditional-attr](https://dequeuniversity.com/rules/axe/4.9/aria-conditional-attr?application=RuleDescription) | Ensures ARIA attributes are used as described in the specification of the element's role | Serious | cat.aria, wcag2a, wcag412, EN-301-549, EN-9.4.1.2 | failure | [5c01ea](https://act-rules.github.io/rules/5c01ea) | | [aria-deprecated-role](https://dequeuniversity.com/rules/axe/4.9/aria-deprecated-role?application=RuleDescription) | Ensures elements do not use deprecated roles | Minor | cat.aria, wcag2a, wcag412, EN-301-549, EN-9.4.1.2 | failure | [674b10](https://act-rules.github.io/rules/674b10) | | [aria-hidden-body](https://dequeuniversity.com/rules/axe/4.9/aria-hidden-body?application=RuleDescription) | Ensures aria-hidden="true" is not present on the document body. | Critical | cat.aria, wcag2a, wcag131, wcag412, EN-301-549, EN-9.1.3.1, EN-9.4.1.2 | failure | | | [aria-hidden-focus](https://dequeuniversity.com/rules/axe/4.9/aria-hidden-focus?application=RuleDescription) | Ensures aria-hidden elements are not focusable nor contain focusable elements | Serious | cat.name-role-value, wcag2a, wcag412, TTv5, TT6.a, EN-301-549, EN-9.4.1.2 | failure, needs review | [6cfa84](https://act-rules.github.io/rules/6cfa84) | | [aria-input-field-name](https://dequeuniversity.com/rules/axe/4.9/aria-input-field-name?application=RuleDescription) | Ensures every ARIA input field has an accessible name | Serious | cat.aria, wcag2a, wcag412, TTv5, TT5.c, EN-301-549, EN-9.4.1.2, ACT | failure, needs review | [e086e5](https://act-rules.github.io/rules/e086e5) | | [aria-meter-name](https://dequeuniversity.com/rules/axe/4.9/aria-meter-name?application=RuleDescription) | Ensures every ARIA meter node has an accessible name | Serious | cat.aria, wcag2a, wcag111, EN-301-549, EN-9.1.1.1 | failure, needs review | | | [aria-progressbar-name](https://dequeuniversity.com/rules/axe/4.9/aria-progressbar-name?application=RuleDescription) | Ensures every ARIA progressbar node has an accessible name | Serious | cat.aria, wcag2a, wcag111, EN-301-549, EN-9.1.1.1 | failure, needs review | | | [aria-prohibited-attr](https://dequeuniversity.com/rules/axe/4.9/aria-prohibited-attr?application=RuleDescription) | Ensures ARIA attributes are not prohibited for an element's role | Serious | cat.aria, wcag2a, wcag412, EN-301-549, EN-9.4.1.2 | failure, needs review | [5c01ea](https://act-rules.github.io/rules/5c01ea) | | [aria-required-attr](https://dequeuniversity.com/rules/axe/4.9/aria-required-attr?application=RuleDescription) | Ensures elements with ARIA roles have all required ARIA attributes | Critical | cat.aria, wcag2a, wcag412, EN-301-549, EN-9.4.1.2 | failure | [4e8ab6](https://act-rules.github.io/rules/4e8ab6) | | [aria-required-children](https://dequeuniversity.com/rules/axe/4.9/aria-required-children?application=RuleDescription) | Ensures elements with an ARIA role that require child roles contain them | Critical | cat.aria, wcag2a, wcag131, EN-301-549, EN-9.1.3.1 | failure, needs review | [bc4a75](https://act-rules.github.io/rules/bc4a75), [ff89c9](https://act-rules.github.io/rules/ff89c9) | | [aria-required-parent](https://dequeuniversity.com/rules/axe/4.9/aria-required-parent?application=RuleDescription) | Ensures elements with an ARIA role that require parent roles are contained by them | Critical | cat.aria, wcag2a, wcag131, EN-301-549, EN-9.1.3.1 | failure | [ff89c9](https://act-rules.github.io/rules/ff89c9) | | [aria-roles](https://dequeuniversity.com/rules/axe/4.9/aria-roles?application=RuleDescription) | Ensures all elements with a role attribute use a valid value | Critical | cat.aria, wcag2a, wcag412, EN-301-549, EN-9.4.1.2 | failure | [674b10](https://act-rules.github.io/rules/674b10) | | [aria-toggle-field-name](https://dequeuniversity.com/rules/axe/4.9/aria-toggle-field-name?application=RuleDescription) | Ensures every ARIA toggle field has an accessible name | Serious | cat.aria, wcag2a, wcag412, TTv5, TT5.c, EN-301-549, EN-9.4.1.2, ACT | failure, needs review | [e086e5](https://act-rules.github.io/rules/e086e5) | | [aria-tooltip-name](https://dequeuniversity.com/rules/axe/4.9/aria-tooltip-name?application=RuleDescription) | Ensures every ARIA tooltip node has an accessible name | Serious | cat.aria, wcag2a, wcag412, EN-301-549, EN-9.4.1.2 | failure, needs review | | | [aria-valid-attr-value](https://dequeuniversity.com/rules/axe/4.9/aria-valid-attr-value?application=RuleDescription) | Ensures all ARIA attributes have valid values | Critical | cat.aria, wcag2a, wcag412, EN-301-549, EN-9.4.1.2 | failure, needs review | [6a7281](https://act-rules.github.io/rules/6a7281) | | [aria-valid-attr](https://dequeuniversity.com/rules/axe/4.9/aria-valid-attr?application=RuleDescription) | Ensures attributes that begin with aria- are valid ARIA attributes | Critical | cat.aria, wcag2a, wcag412, EN-301-549, EN-9.4.1.2 | failure | [5f99a7](https://act-rules.github.io/rules/5f99a7) | | [blink](https://dequeuniversity.com/rules/axe/4.9/blink?application=RuleDescription) | Ensures <blink> elements are not used | Serious | cat.time-and-media, wcag2a, wcag222, section508, section508.22.j, TTv5, TT2.b, EN-301-549, EN-9.2.2.2 | failure | | | [button-name](https://dequeuniversity.com/rules/axe/4.9/button-name?application=RuleDescription) | Ensures buttons have discernible text | Critical | cat.name-role-value, wcag2a, wcag412, section508, section508.22.a, TTv5, TT6.a, EN-301-549, EN-9.4.1.2, ACT | failure, needs review | [97a4e1](https://act-rules.github.io/rules/97a4e1), [m6b1q3](https://act-rules.github.io/rules/m6b1q3) | | [bypass](https://dequeuniversity.com/rules/axe/4.9/bypass?application=RuleDescription) | 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, TTv5, TT9.a, EN-301-549, EN-9.2.4.1 | needs review | [cf77f2](https://act-rules.github.io/rules/cf77f2), [047fe0](https://act-rules.github.io/rules/047fe0), [b40fd1](https://act-rules.github.io/rules/b40fd1), [3e12e1](https://act-rules.github.io/rules/3e12e1), [ye5d6e](https://act-rules.github.io/rules/ye5d6e) | | [color-contrast](https://dequeuniversity.com/rules/axe/4.9/color-contrast?application=RuleDescription) | Ensures the contrast between foreground and background colors meets WCAG 2 AA minimum contrast ratio thresholds | Serious | cat.color, wcag2aa, wcag143, TTv5, TT13.c, EN-301-549, EN-9.1.4.3, ACT | failure, needs review | [afw4f7](https://act-rules.github.io/rules/afw4f7), [09o5cg](https://act-rules.github.io/rules/09o5cg) | | [definition-list](https://dequeuniversity.com/rules/axe/4.9/definition-list?application=RuleDescription) | Ensures <dl> elements are structured correctly | Serious | cat.structure, wcag2a, wcag131, EN-301-549, EN-9.1.3.1 | failure | | | [dlitem](https://dequeuniversity.com/rules/axe/4.9/dlitem?application=RuleDescription) | Ensures <dt> and <dd> elements are contained by a <dl> | Serious | cat.structure, wcag2a, wcag131, EN-301-549, EN-9.1.3.1 | failure | | | [document-title](https://dequeuniversity.com/rules/axe/4.9/document-title?application=RuleDescription) | Ensures each HTML document contains a non-empty <title> element | Serious | cat.text-alternatives, wcag2a, wcag242, TTv5, TT12.a, EN-301-549, EN-9.2.4.2, ACT | failure | [2779a5](https://act-rules.github.io/rules/2779a5) | | [duplicate-id-aria](https://dequeuniversity.com/rules/axe/4.9/duplicate-id-aria?application=RuleDescription) | Ensures every id attribute value used in ARIA and in labels is unique | Critical | cat.parsing, wcag2a, wcag412, EN-301-549, EN-9.4.1.2 | needs review | [3ea0c8](https://act-rules.github.io/rules/3ea0c8) | | [form-field-multiple-labels](https://dequeuniversity.com/rules/axe/4.9/form-field-multiple-labels?application=RuleDescription) | Ensures form field does not have multiple label elements | Moderate | cat.forms, wcag2a, wcag332, TTv5, TT5.c, EN-301-549, EN-9.3.3.2 | needs review | | | [frame-focusable-content](https://dequeuniversity.com/rules/axe/4.9/frame-focusable-content?application=RuleDescription) | Ensures <frame> and <iframe> elements with focusable content do not have tabindex=-1 | Serious | cat.keyboard, wcag2a, wcag211, TTv5, TT4.a, EN-301-549, EN-9.2.1.1 | failure, needs review | [akn7bn](https://act-rules.github.io/rules/akn7bn) | | [frame-title-unique](https://dequeuniversity.com/rules/axe/4.9/frame-title-unique?application=RuleDescription) | Ensures <iframe> and <frame> elements contain a unique title attribute | Serious | cat.text-alternatives, wcag2a, wcag412, TTv5, TT12.d, EN-301-549, EN-9.4.1.2 | needs review | [4b1c6c](https://act-rules.github.io/rules/4b1c6c) | | [frame-title](https://dequeuniversity.com/rules/axe/4.9/frame-title?application=RuleDescription) | Ensures <iframe> and <frame> elements have an accessible name | Serious | cat.text-alternatives, wcag2a, wcag412, section508, section508.22.i, TTv5, TT12.d, EN-301-549, EN-9.4.1.2 | failure, needs review | [cae760](https://act-rules.github.io/rules/cae760) | | [html-has-lang](https://dequeuniversity.com/rules/axe/4.9/html-has-lang?application=RuleDescription) | Ensures every HTML document has a lang attribute | Serious | cat.language, wcag2a, wcag311, TTv5, TT11.a, EN-301-549, EN-9.3.1.1, ACT | failure | [b5c3f8](https://act-rules.github.io/rules/b5c3f8) | | [html-lang-valid](https://dequeuniversity.com/rules/axe/4.9/html-lang-valid?application=RuleDescription) | Ensures the lang attribute of the <html> element has a valid value | Serious | cat.language, wcag2a, wcag311, TTv5, TT11.a, EN-301-549, EN-9.3.1.1, ACT | failure | [bf051a](https://act-rules.github.io/rules/bf051a) | | [html-xml-lang-mismatch](https://dequeuniversity.com/rules/axe/4.9/html-xml-lang-mismatch?application=RuleDescription) | 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, EN-301-549, EN-9.3.1.1, ACT | failure | [5b7ae0](https://act-rules.github.io/rules/5b7ae0) | | [image-alt](https://dequeuniversity.com/rules/axe/4.9/image-alt?application=RuleDescription) | Ensures <img> elements have alternate text or a role of none or presentation | Critical | cat.text-alternatives, wcag2a, wcag111, section508, section508.22.a, TTv5, TT7.a, TT7.b, EN-301-549, EN-9.1.1.1, ACT | failure, needs review | [23a2a8](https://act-rules.github.io/rules/23a2a8) | | [input-button-name](https://dequeuniversity.com/rules/axe/4.9/input-button-name?application=RuleDescription) | Ensures input buttons have discernible text | Critical | cat.name-role-value, wcag2a, wcag412, section508, section508.22.a, TTv5, TT5.c, EN-301-549, EN-9.4.1.2, ACT | failure, needs review | [97a4e1](https://act-rules.github.io/rules/97a4e1) | | [input-image-alt](https://dequeuniversity.com/rules/axe/4.9/input-image-alt?application=RuleDescription) | Ensures <input type="image"> elements have alternate text | Critical | cat.text-alternatives, wcag2a, wcag111, wcag412, section508, section508.22.a, TTv5, TT7.a, EN-301-549, EN-9.1.1.1, EN-9.4.1.2, ACT | failure, needs review | [59796f](https://act-rules.github.io/rules/59796f) | | [label](https://dequeuniversity.com/rules/axe/4.9/label?application=RuleDescription) | Ensures every form element has a label | Critical | cat.forms, wcag2a, wcag412, section508, section508.22.n, TTv5, TT5.c, EN-301-549, EN-9.4.1.2, ACT | failure, needs review | [e086e5](https://act-rules.github.io/rules/e086e5) | | [link-in-text-block](https://dequeuniversity.com/rules/axe/4.9/link-in-text-block?application=RuleDescription) | Ensure links are distinguished from surrounding text in a way that does not rely on color | Serious | cat.color, wcag2a, wcag141, TTv5, TT13.a, EN-301-549, EN-9.1.4.1 | failure, needs review | | | [link-name](https://dequeuniversity.com/rules/axe/4.9/link-name?application=RuleDescription) | Ensures links have discernible text | Serious | cat.name-role-value, wcag2a, wcag244, wcag412, section508, section508.22.a, TTv5, TT6.a, EN-301-549, EN-9.2.4.4, EN-9.4.1.2, ACT | failure, needs review | [c487ae](https://act-rules.github.io/rules/c487ae) | | [list](https://dequeuniversity.com/rules/axe/4.9/list?application=RuleDescription) | Ensures that lists are structured correctly | Serious | cat.structure, wcag2a, wcag131, EN-301-549, EN-9.1.3.1 | failure | | | [listitem](https://dequeuniversity.com/rules/axe/4.9/listitem?application=RuleDescription) | Ensures <li> elements are used semantically | Serious | cat.structure, wcag2a, wcag131, EN-301-549, EN-9.1.3.1 | failure | | | [marquee](https://dequeuniversity.com/rules/axe/4.9/marquee?application=RuleDescription) | Ensures <marquee> elements are not used | Serious | cat.parsing, wcag2a, wcag222, TTv5, TT2.b, EN-301-549, EN-9.2.2.2 | failure | | | [meta-refresh](https://dequeuniversity.com/rules/axe/4.9/meta-refresh?application=RuleDescription) | Ensures <meta http-equiv="refresh"> is not used for delayed refresh | Critical | cat.time-and-media, wcag2a, wcag221, TTv5, TT8.a, EN-301-549, EN-9.2.2.1 | failure | [bc659a](https://act-rules.github.io/rules/bc659a), [bisz58](https://act-rules.github.io/rules/bisz58) | | [meta-viewport](https://dequeuniversity.com/rules/axe/4.9/meta-viewport?application=RuleDescription) | Ensures <meta name="viewport"> does not disable text scaling and zooming | Critical | cat.sensory-and-visual-cues, wcag2aa, wcag144, EN-301-549, EN-9.1.4.4, ACT | failure | [b4f0c3](https://act-rules.github.io/rules/b4f0c3) | | [nested-interactive](https://dequeuniversity.com/rules/axe/4.9/nested-interactive?application=RuleDescription) | Ensures interactive controls are not nested as they are not always announced by screen readers or can cause focus problems for assistive technologies | Serious | cat.keyboard, wcag2a, wcag412, TTv5, TT6.a, EN-301-549, EN-9.4.1.2 | failure, needs review | [307n5z](https://act-rules.github.io/rules/307n5z) | | [no-autoplay-audio](https://dequeuniversity.com/rules/axe/4.9/no-autoplay-audio?application=RuleDescription) | Ensures <video> or <audio> elements do not autoplay audio for more than 3 seconds without a control mechanism to stop or mute the audio | Moderate | cat.time-and-media, wcag2a, wcag142, TTv5, TT2.a, EN-301-549, EN-9.1.4.2, ACT | needs review | [80f0bf](https://act-rules.github.io/rules/80f0bf) | | [object-alt](https://dequeuniversity.com/rules/axe/4.9/object-alt?application=RuleDescription) | Ensures <object> elements have alternate text | Serious | cat.text-alternatives, wcag2a, wcag111, section508, section508.22.a, EN-301-549, EN-9.1.1.1 | failure, needs review | [8fc3b6](https://act-rules.github.io/rules/8fc3b6) | | [role-img-alt](https://dequeuniversity.com/rules/axe/4.9/role-img-alt?application=RuleDescription) | Ensures [role="img"] elements have alternate text | Serious | cat.text-alternatives, wcag2a, wcag111, section508, section508.22.a, TTv5, TT7.a, EN-301-549, EN-9.1.1.1, ACT | failure, needs review | [23a2a8](https://act-rules.github.io/rules/23a2a8) | | [scrollable-region-focusable](https://dequeuniversity.com/rules/axe/4.9/scrollable-region-focusable?application=RuleDescription) | Ensure elements that have scrollable content are accessible by keyboard | Serious | cat.keyboard, wcag2a, wcag211, wcag213, TTv5, TT4.a, EN-301-549, EN-9.2.1.1, EN-9.2.1.3 | failure | [0ssw9k](https://act-rules.github.io/rules/0ssw9k) | | [select-name](https://dequeuniversity.com/rules/axe/4.9/select-name?application=RuleDescription) | Ensures select element has an accessible name | Critical | cat.forms, wcag2a, wcag412, section508, section508.22.n, TTv5, TT5.c, EN-301-549, EN-9.4.1.2, ACT | failure, needs review | [e086e5](https://act-rules.github.io/rules/e086e5) | | [server-side-image-map](https://dequeuniversity.com/rules/axe/4.9/server-side-image-map?application=RuleDescription) | Ensures that server-side image maps are not used | Minor | cat.text-alternatives, wcag2a, wcag211, section508, section508.22.f, TTv5, TT4.a, EN-301-549, EN-9.2.1.1 | needs review | | | [svg-img-alt](https://dequeuniversity.com/rules/axe/4.9/svg-img-alt?application=RuleDescription) | Ensures <svg> elements with an img, graphics-document or graphics-symbol role have an accessible text | Serious | cat.text-alternatives, wcag2a, wcag111, section508, section508.22.a, TTv5, TT7.a, EN-301-549, EN-9.1.1.1, ACT | failure, needs review | [7d6734](https://act-rules.github.io/rules/7d6734) | | [td-headers-attr](https://dequeuniversity.com/rules/axe/4.9/td-headers-attr?application=RuleDescription) | Ensure that each cell in a table that uses the headers attribute refers only to other cells in that table | Serious | cat.tables, wcag2a, wcag131, section508, section508.22.g, TTv5, TT14.b, EN-301-549, EN-9.1.3.1 | failure, needs review | [a25f45](https://act-rules.github.io/rules/a25f45) | | [th-has-data-cells](https://dequeuniversity.com/rules/axe/4.9/th-has-data-cells?application=RuleDescription) | Ensure that <th> elements and elements with role=columnheader/rowheader have data cells they describe | Serious | cat.tables, wcag2a, wcag131, section508, section508.22.g, TTv5, TT14.b, EN-301-549, EN-9.1.3.1 | failure, needs review | [d0f69e](https://act-rules.github.io/rules/d0f69e) | | [valid-lang](https://dequeuniversity.com/rules/axe/4.9/valid-lang?application=RuleDescription) | Ensures lang attributes have valid values | Serious | cat.language, wcag2aa, wcag312, TTv5, TT11.b, EN-301-549, EN-9.3.1.2, ACT | failure | [de46e4](https://act-rules.github.io/rules/de46e4) | | [video-caption](https://dequeuniversity.com/rules/axe/4.9/video-caption?application=RuleDescription) | Ensures <video> elements have captions | Critical | cat.text-alternatives, wcag2a, wcag122, section508, section508.22.a, TTv5, TT17.a, EN-301-549, EN-9.1.2.2 | needs review | [eac66b](https://act-rules.github.io/rules/eac66b) | ## WCAG 2.1 Level A & AA Rules | Rule ID | Description | Impact | Tags | Issue Type | ACT Rules | | :----------------------------------------------------------------------------------------------------------------- | :-------------------------------------------------------------------------------------------- | :------ | :-------------------------------------------------------------- | :--------- | :--------------------------------------------------------------------------------------------------------------------------------------------------------- | | [autocomplete-valid](https://dequeuniversity.com/rules/axe/4.9/autocomplete-valid?application=RuleDescription) | Ensure the autocomplete attribute is correct and suitable for the form field | Serious | cat.forms, wcag21aa, wcag135, EN-301-549, EN-9.1.3.5, ACT | failure | [73f2c2](https://act-rules.github.io/rules/73f2c2) | | [avoid-inline-spacing](https://dequeuniversity.com/rules/axe/4.9/avoid-inline-spacing?application=RuleDescription) | Ensure that text spacing set through style attributes can be adjusted with custom stylesheets | Serious | cat.structure, wcag21aa, wcag1412, EN-301-549, EN-9.1.4.12, ACT | failure | [24afc2](https://act-rules.github.io/rules/24afc2), [9e45ec](https://act-rules.github.io/rules/9e45ec), [78fd32](https://act-rules.github.io/rules/78fd32) | ## WCAG 2.2 Level A & AA Rules These rules are disabled by default, until WCAG 2.2 is more widely adopted and required. | Rule ID | Description | Impact | Tags | Issue Type | ACT Rules | | :----------------------------------------------------------------------------------------------- | :------------------------------------------------- | :------ | :--------------------------------------------- | :------------------------- | :-------- | | [target-size](https://dequeuniversity.com/rules/axe/4.9/target-size?application=RuleDescription) | Ensure touch target have sufficient size and space | Serious | cat.sensory-and-visual-cues, wcag22aa, wcag258 | failure, needs review | | ## Best Practices Rules Rules that do not necessarily conform to WCAG success criterion but are industry accepted practices that improve the user experience. | Rule ID | Description | Impact | Tags | Issue Type | ACT Rules | | :----------------------------------------------------------------------------------------------------------------------------------------------- | :--------------------------------------------------------------------------------------------------------------------------------------------- | :------- | :----------------------------------------- | :------------------------- | :------------------------------------------------- | | [accesskeys](https://dequeuniversity.com/rules/axe/4.9/accesskeys?application=RuleDescription) | Ensures every accesskey attribute value is unique | Serious | cat.keyboard, best-practice | failure | | | [aria-allowed-role](https://dequeuniversity.com/rules/axe/4.9/aria-allowed-role?application=RuleDescription) | Ensures role attribute has an appropriate value for the element | Minor | cat.aria, best-practice | failure, needs review | | | [aria-dialog-name](https://dequeuniversity.com/rules/axe/4.9/aria-dialog-name?application=RuleDescription) | Ensures every ARIA dialog and alertdialog node has an accessible name | Serious | cat.aria, best-practice | failure, needs review | | | [aria-text](https://dequeuniversity.com/rules/axe/4.9/aria-text?application=RuleDescription) | Ensures role="text" is used on elements with no focusable descendants | Serious | cat.aria, best-practice | failure, needs review | | | [aria-treeitem-name](https://dequeuniversity.com/rules/axe/4.9/aria-treeitem-name?application=RuleDescription) | Ensures every ARIA treeitem node has an accessible name | Serious | cat.aria, best-practice | failure, needs review | | | [empty-heading](https://dequeuniversity.com/rules/axe/4.9/empty-heading?application=RuleDescription) | Ensures headings have discernible text | Minor | cat.name-role-value, best-practice | failure, needs review | [ffd0e9](https://act-rules.github.io/rules/ffd0e9) | | [empty-table-header](https://dequeuniversity.com/rules/axe/4.9/empty-table-header?application=RuleDescription) | Ensures table headers have discernible text | Minor | cat.name-role-value, best-practice | failure, needs review | | | [frame-tested](https://dequeuniversity.com/rules/axe/4.9/frame-tested?application=RuleDescription) | Ensures <iframe> and <frame> elements contain the axe-core script | Critical | cat.structure, best-practice, review-item | failure, needs review | | | [heading-order](https://dequeuniversity.com/rules/axe/4.9/heading-order?application=RuleDescription) | Ensures the order of headings is semantically correct | Moderate | cat.semantics, best-practice | failure, needs review | | | [image-redundant-alt](https://dequeuniversity.com/rules/axe/4.9/image-redundant-alt?application=RuleDescription) | Ensure image alternative is not repeated as text | Minor | cat.text-alternatives, best-practice | failure | | | [label-title-only](https://dequeuniversity.com/rules/axe/4.9/label-title-only?application=RuleDescription) | Ensures that every form element has a visible label and is not solely labeled using hidden labels, or the title or aria-describedby attributes | Serious | cat.forms, best-practice | failure | | | [landmark-banner-is-top-level](https://dequeuniversity.com/rules/axe/4.9/landmark-banner-is-top-level?application=RuleDescription) | Ensures the banner landmark is at top level | Moderate | cat.semantics, best-practice | failure | | | [landmark-complementary-is-top-level](https://dequeuniversity.com/rules/axe/4.9/landmark-complementary-is-top-level?application=RuleDescription) | Ensures the complementary landmark or aside is at top level | Moderate | cat.semantics, best-practice | failure | | | [landmark-contentinfo-is-top-level](https://dequeuniversity.com/rules/axe/4.9/landmark-contentinfo-is-top-level?application=RuleDescription) | Ensures the contentinfo landmark is at top level | Moderate | cat.semantics, best-practice | failure | | | [landmark-main-is-top-level](https://dequeuniversity.com/rules/axe/4.9/landmark-main-is-top-level?application=RuleDescription) | Ensures the main landmark is at top level | Moderate | cat.semantics, best-practice | failure | | | [landmark-no-duplicate-banner](https://dequeuniversity.com/rules/axe/4.9/landmark-no-duplicate-banner?application=RuleDescription) | Ensures the document has at most one banner landmark | Moderate | cat.semantics, best-practice | failure | | | [landmark-no-duplicate-contentinfo](https://dequeuniversity.com/rules/axe/4.9/landmark-no-duplicate-contentinfo?application=RuleDescription) | Ensures the document has at most one contentinfo landmark | Moderate | cat.semantics, best-practice | failure | | | [landmark-no-duplicate-main](https://dequeuniversity.com/rules/axe/4.9/landmark-no-duplicate-main?application=RuleDescription) | Ensures the document has at most one main landmark | Moderate | cat.semantics, best-practice | failure | | | [landmark-one-main](https://dequeuniversity.com/rules/axe/4.9/landmark-one-main?application=RuleDescription) | Ensures the document has a main landmark | Moderate | cat.semantics, best-practice | failure | | | [landmark-unique](https://dequeuniversity.com/rules/axe/4.9/landmark-unique?application=RuleDescription) | Landmarks should have a unique role or role/label/title (i.e. accessible name) combination | Moderate | cat.semantics, best-practice | failure | | | [meta-viewport-large](https://dequeuniversity.com/rules/axe/4.9/meta-viewport-large?application=RuleDescription) | Ensures <meta name="viewport"> can scale a significant amount | Minor | cat.sensory-and-visual-cues, best-practice | failure | | | [page-has-heading-one](https://dequeuniversity.com/rules/axe/4.9/page-has-heading-one?application=RuleDescription) | Ensure that the page, or at least one of its frames contains a level-one heading | Moderate | cat.semantics, best-practice | failure | | | [presentation-role-conflict](https://dequeuniversity.com/rules/axe/4.9/presentation-role-conflict?application=RuleDescription) | Elements marked as presentational should not have global ARIA or tabindex to ensure all screen readers ignore them | Minor | cat.aria, best-practice, ACT | failure | [46ca7f](https://act-rules.github.io/rules/46ca7f) | | [region](https://dequeuniversity.com/rules/axe/4.9/region?application=RuleDescription) | Ensures all page content is contained by landmarks | Moderate | cat.keyboard, best-practice | failure | | | [scope-attr-valid](https://dequeuniversity.com/rules/axe/4.9/scope-attr-valid?application=RuleDescription) | Ensures the scope attribute is used correctly on tables | Moderate | cat.tables, best-practice | failure | | | [skip-link](https://dequeuniversity.com/rules/axe/4.9/skip-link?application=RuleDescription) | Ensure all skip links have a focusable target | Moderate | cat.keyboard, best-practice | failure, needs review | | | [tabindex](https://dequeuniversity.com/rules/axe/4.9/tabindex?application=RuleDescription) | Ensures tabindex attribute values are not greater than 0 | Serious | cat.keyboard, best-practice | failure | | | [table-duplicate-name](https://dequeuniversity.com/rules/axe/4.9/table-duplicate-name?application=RuleDescription) | Ensure the <caption> element does not contain the same text as the summary attribute | Minor | cat.tables, best-practice | failure, needs review | | ## WCAG 2.x level AAA rules Rules that check for conformance to WCAG AAA success criteria that can be fully automated. These are disabled by default in axe-core. | Rule ID | Description | Impact | Tags | Issue Type | ACT Rules | | :--------------------------------------------------------------------------------------------------------------------------------- | :---------------------------------------------------------------------------------------------------------------- | :------ | :--------------------------------------------- | :------------------------- | :------------------------------------------------- | | [color-contrast-enhanced](https://dequeuniversity.com/rules/axe/4.9/color-contrast-enhanced?application=RuleDescription) | Ensures the contrast between foreground and background colors meets WCAG 2 AAA enhanced contrast ratio thresholds | Serious | cat.color, wcag2aaa, wcag146, ACT | failure, needs review | [09o5cg](https://act-rules.github.io/rules/09o5cg) | | [identical-links-same-purpose](https://dequeuniversity.com/rules/axe/4.9/identical-links-same-purpose?application=RuleDescription) | Ensure that links with the same accessible name serve a similar purpose | Minor | cat.semantics, wcag2aaa, wcag249 | needs review | [b20e66](https://act-rules.github.io/rules/b20e66) | | [meta-refresh-no-exceptions](https://dequeuniversity.com/rules/axe/4.9/meta-refresh-no-exceptions?application=RuleDescription) | Ensures <meta http-equiv="refresh"> is not used for delayed refresh | Minor | cat.time-and-media, wcag2aaa, wcag224, wcag325 | failure | [bisz58](https://act-rules.github.io/rules/bisz58) | ## Experimental Rules Rules we are still testing and developing. They are disabled by default in axe-core, but are enabled for the axe browser extensions. | Rule ID | Description | Impact | Tags | Issue Type | ACT Rules | | :------------------------------------------------------------------------------------------------------------------------------- | :------------------------------------------------------------------------------------------------------------------------- | :------- | :----------------------------------------------------------------------------------------------------------- | :------------------------- | :------------------------------------------------- | | [css-orientation-lock](https://dequeuniversity.com/rules/axe/4.9/css-orientation-lock?application=RuleDescription) | Ensures content is not locked to any specific display orientation, and the content is operable in all display orientations | Serious | cat.structure, wcag134, wcag21aa, EN-301-549, EN-9.1.3.4, experimental | failure, needs review | [b33eff](https://act-rules.github.io/rules/b33eff) | | [focus-order-semantics](https://dequeuniversity.com/rules/axe/4.9/focus-order-semantics?application=RuleDescription) | Ensures elements in the focus order have a role appropriate for interactive content | Minor | cat.keyboard, best-practice, experimental | failure | | | [hidden-content](https://dequeuniversity.com/rules/axe/4.9/hidden-content?application=RuleDescription) | Informs users about hidden content. | Minor | cat.structure, best-practice, experimental, review-item | failure, needs review | | | [label-content-name-mismatch](https://dequeuniversity.com/rules/axe/4.9/label-content-name-mismatch?application=RuleDescription) | Ensures that elements labelled through their content must have their visible text as part of their accessible name | Serious | cat.semantics, wcag21a, wcag253, EN-301-549, EN-9.2.5.3, experimental | failure | [2ee8b8](https://act-rules.github.io/rules/2ee8b8) | | [p-as-heading](https://dequeuniversity.com/rules/axe/4.9/p-as-heading?application=RuleDescription) | Ensure bold, italic text and font-size is not used to style <p> elements as a heading | Serious | cat.semantics, wcag2a, wcag131, EN-301-549, EN-9.1.3.1, experimental | failure, needs review | | | [table-fake-caption](https://dequeuniversity.com/rules/axe/4.9/table-fake-caption?application=RuleDescription) | Ensure that tables with a caption use the <caption> element. | Serious | cat.tables, experimental, wcag2a, wcag131, section508, section508.22.g, EN-301-549, EN-9.1.3.1 | failure | | | [td-has-header](https://dequeuniversity.com/rules/axe/4.9/td-has-header?application=RuleDescription) | Ensure that each non-empty data cell in a <table> larger than 3 by 3 has one or more table headers | Critical | cat.tables, experimental, wcag2a, wcag131, section508, section508.22.g, TTv5, TT14.b, EN-301-549, EN-9.1.3.1 | failure | | ## Deprecated Rules Deprecated rules are disabled by default and will be removed in the next major release. | Rule ID | Description | Impact | Tags | Issue Type | ACT Rules | | :----------------------------------------------------------------------------------------------------------------- | :------------------------------------------------------------------------------------- | :------- | :--------------------------------------------------------------------------------------------------- | :------------------------- | :----------------------------------------------------------------------------------------------------- | | [aria-roledescription](https://dequeuniversity.com/rules/axe/4.9/aria-roledescription?application=RuleDescription) | Ensure aria-roledescription is only used on elements with an implicit or explicit role | Serious | cat.aria, wcag2a, wcag412, EN-301-549, EN-9.4.1.2, deprecated | failure, needs review | | | [audio-caption](https://dequeuniversity.com/rules/axe/4.9/audio-caption?application=RuleDescription) | Ensures <audio> elements have captions | Critical | cat.time-and-media, wcag2a, wcag121, EN-301-549, EN-9.1.2.1, section508, section508.22.a, deprecated | needs review | [2eb176](https://act-rules.github.io/rules/2eb176), [afb423](https://act-rules.github.io/rules/afb423) | | [duplicate-id-active](https://dequeuniversity.com/rules/axe/4.9/duplicate-id-active?application=RuleDescription) | Ensures every id attribute value of active elements is unique | Serious | cat.parsing, wcag2a-obsolete, wcag411, deprecated | failure | [3ea0c8](https://act-rules.github.io/rules/3ea0c8) | | [duplicate-id](https://dequeuniversity.com/rules/axe/4.9/duplicate-id?application=RuleDescription) | Ensures every id attribute value is unique | Minor | cat.parsing, wcag2a-obsolete, wcag411, deprecated | failure | [3ea0c8](https://act-rules.github.io/rules/3ea0c8) |