ARC-Tracker

Contains documentation and public issue tracker for the ARC Toolkit extension.

• ARC Toolkit Terms of use
• Download ARC Toolkit from the Google Chrome store.
• Download the ARC Toolkit Quickstart Guide (PDF) to get started.

  Reporting issues

  If you find an issue with the ARC Toolkit, please file an issue with the following information:

  • Concise title that summarises the issue;
  • Brief description of the issue;
  • ARC Toolkit version;
  • Name and version of the OS and browser;
  • Expected result
  • Actual result
  • Test case that demonstrates the issue - provide linked test case codepen/JSbin etc.

  The rules

  The following is the documentation on the assertions that form the ARC rule set in the ARC extension. This documentation is a work in progress, but I hope will provide you with a clear understanding of what the ARC extension currently tests.
  ARC rules

  AAP ID	Assertion	Category	WCAG 2.0 Criteria
  269	activeSvgMissingAriaLabel active SVG missing aria-label	Error	4.1.2 Name, Role, Value (A)
  270	altAttributeOnSvgElement The SVG image uses the alt attribute to provide a text alternative. This is an invalid method of providing a text alternative for SVG images.	Error	1.1.1 Non-text Content (A)
  271	altTextIsallWhitespace <img> elements must provide an alt attribute value in order to convey the meaning of the image to screen reader users.	Error	1.1.1 Non-text Content (A)
  272	altTextIsallWhitespaceInput The input (type=image") has no programmatic label."	Error	1.1.1 Non-text Content (A)
  273	ariaExpandedOnInvalidRole The aria-expanded attribute is incorrectly used. The aria-expanded attribute is to be set on the item/element which controls the expansion and collapse of another item. It does not get set on the item which is expanded or collapsed. The state is not accurately conveyed to screen readers.	Error	4.1.2 Name, Role, Value (A)
  274	ARIAHiddenUsedOnFocusable An element that receives keyboard focus has aria-hidden="true" set on it. Nothing is announced by screen readers when the element receives keyboard focus. Sceen reader users will not know what the element is."	Error	2.1.1 Keyboard (A)
  275	ariaLabelledbyOnNonInteractiveElement aria-labelledby is used on an element which does not reliably convey this attribute	Error	4.1.2 Name, Role, Value (A)
  276	ariaLabelOnNonInteractiveElement aria-label is used on an element which does not reliably convey this attribute	Error	4.1.2 Name, Role, Value (A)
  277	badAriaAttribute An element uses an invalid ARIA attribute. No information about the attribute is available to assistive technology.	Error	4.1.2 Name, Role, Value (A)
  278	badAriaRole An element uses an invalid ARIA role. No information about the role (the type of element) is available to assistive technology.	Error	4.1.2 Name, Role, Value (A)
  279	badLongdesc The longdesc attribute value contains a space or is empty. The longdesc attribute value must be null or contain spaces.	Error	1.1.1 Non-text Content (A)
  	duplicateForAndId The id attributes used on the page must be unique. Some screen readers and browsers will be confused by duplicate ids.	Error	4.1.1 Parsing (A)
  281	duplicateLabelsUsed Form labels are duplicated. This makes it more difficult for all users to understand and complete forms unless the structure provides adequate differentiation and context for labels.	Error	2.4.6 Headings and Labels (AA)
  282	emptyAltInput empty alt< /td>	Error	1.1.1 Non-text Content (A)
  283	emptyAltWithTitle The image has an empty alt attribute but has a title or aria-label attribute.	Error	1.1.1 Non-text Content (A)
  284	emptyAltWtihARIALabel The image has an empty alt attribute but has a title or aria-label attribute.	Error	1.1.1 Non-text Content (A)
  285	emptyFrameTitle title is empty - add text describing the purpose of the frame to the title attribute or use the word 'empty' to indicate no user content	Error	4.1.2 Name, Role, Value (A)
  286	emptyLabelText The labeling method used for the form field is an empty string. Screen readers will not announce the form field label.	Error	2.4.6 Headings and Labels (AA)
  287	emptyLangOnHTML language attribute is empty	Error	3.1.1 Language of Page (A)
  288	hotSpotWithEmptyAlt The image map and image map hot spots have empty alt attributes. Image maps and hotspots should have an alt attribute set with alternative text that describes the function of the image map (what the image does and/or where the link goes) so screen reader users will understand the image map links.	Error	1.1.1 Non-text Content (A)
  289	hotSpotWithNoAlt The image map and image map hot spots are missing alt attributes. Image maps and hotspots should have alternative text that describes the function of the image map (what the image does and/or where the link goes) so screen reader users will understand the image map links.	Error	1.1.1 Non-text Content (A)
  290	iframeNoTitle The iframe is missing the title attribute. The iframe purpose is not communicated clearly to screen reader users.	Error	4.1.2 Name, Role, Value (A)
  291	imgWithAriaDescribedBy The image has a null alt attribute or no alt attribute and uses the aria-describedby attribute. The meaning of the image may not be available to some assistive technology.	Error	1.1.1 Non-text Content (A)
  292	inputNoAccessibleName The form control has no visible label text. Users will not understand the purpose of the control or what type of input is expected.	Error	1.1.1 Non-text Content (A)
  293	inputNoAccessibleNameUseAlt The button uses an image that has no text alternative. The button name and/or function will not be available to users of assistive technology.	Error	1.1.1 Non-text Content (A)
  	InsufficientNormalTextContrast Insufficient color contrast between foreground text and the background	Error	1.4.3 Contrast (Minimum) (AA)
  294	invalidARIALabelledbyID invalid aria-labelledby id	Error	4.1.2 Name, Role, Value (A)
  295	invalidAttrOnRadioButton The aria-invalid attribute is set on a radio button.	Error	3.3.3 Error Suggestion (AA)
  296	invalidTitleChars The HTML <title> element contains special characters, such as '~' or '^'. The page title may be confusing to users of assistive technology.	Error	2.4.2 Page title d (A)
  297	labelHiddenWithAriaHidden A form control uses a <label> element but the <label> is hidden from assistive technology by using aria-hidden=true". The form control label will not be announced by screen readers."	Error	4.1.2 Name, Role, Value (A)
  298	labelHiddenWithDisplayNone A form control uses a <label> element but the <label> is hidden from assistive technology by using display:none. The form control label will not be announced by screen readers.	Error	4.1.2 Name, Role, Value (A)
  299	labelHiddenWithVisibilityHidden A form control uses a <label> element but the <label> is hidden from assistive technology by using visibility:hidden. The form control label will not be announced by screen readers.	Error	4.1.2 Name, Role, Value (A)
  300	labelParentHiddenWithAriaHidden A form control uses a <label> element but the <label> is hidden from assistive technology by using aria-hidden=true" on the parent element that contains the <label>. The form control label will not be announced by screen readers."	Error	4.1.2 Name, Role, Value (A)
  301	labelParentHiddenWithDisplayNone A form control uses a <label> element but the <label> is hidden from assistive technology by using display:none that is set on the parent element that contains the <label>. The form control label will not be announced by screen readers.	Error	4.1.2 Name, Role, Value (A)
  302	langNotDefinedOnHTML The page does not specify the default language. Screen readers may not read the content with the correct pronunciation.	Error	3.1.1 Language of Page (A)
  303	legendEmpty The <legend> element has no text. The programmatic grouping information is not available to assistive technology.	Error	3.3.2 Labels or Instructions (A)
  304	listItemHasNoListParent List items (<li>) do not have the required <ul> or <ol> parent element.	Error	4.1.1 Parsing (A)
  305	longdescWithEmptyAlt An image that uses longdesc has an empty alt attribute.	Error	1.1.1 Non-text Content (A)
  306	longdescWithNoAlt An image that uses longdesc has no alt attribute and text alternative.	Error	1.1.1 Non-text Content (A)
  307	missingLinkAltAttribute The link/button purpose cannot be determined from the link text and the page context. Screen reader users may not know the purpose of the link.	Error	2.4.4 Link Purpose (In Context) (A)
  308	missingTableHeaders missing column and row headers	Error	1.3.1 Info and Relationships (A)
  309	multipleFormLabelsUsed There are multiple <label> elements that reference the same form field. Screen readers may not be able to correctly associate labels and form fields.	Error	4.1.2 Name, Role, Value (A)
  310	multipleLegendElements The <fieldset> element contains more than one <legend> element.	Error	3.3.2 Labels or Instructions (A)
  311	multipleMainLandmarks The page contains more than one main ARIA landmark or HTML5 <main> element.	Error	2.4.1 Bypass Blocks (A)
  312	noAlt <img> elements must provide an alt attribute in order to convey the meaning of the image to screen reader users	Error	1.1.1 Non-text Content (A)
  313	noAriaLevelOnRoleHeading Headings defined with the ARIA role='heading' do not have the aria-level attribute set on them to indicate the heading level. Some screen readers may interpret the heading level incorrectly.	Error	1.3.1 Info and Relationships (A)
  314	noButtonText The button has no programmatic name. The purpose of the button will not be available to users of assistive technology.	Error	4.1.2 Name, Role, Value (A)
  315	noBypassAvailable No method is provided to bypass blocks of content.	Error	2.4.1 Bypass Blocks (A)
  316	noDoctype The HTML <doctype> element is missing. Assistive technology relies on the <doctype> element to interpret the page so AT users can perceive and interact with page content.	Error	4.1.1 Parsing (A)
  317	noH1 There is no h1 heading on the page. Each page should have an h1 heading at the start of the main page content. The heading text should describe the main page content and be the same as the page title .	Error	1.3.1 Info and Relationships (A)
  318	noHeadingsOnPage The headings on the page do not use the relevant h1 to h6 elements to indicate page structure.	Error	1.3.1 Info and Relationships (A)
  319	noHeadingText There are empty headings on the page. Screen reader users may find the page structure confusing, inaccurate, or hard to navigate.	Error	1.3.1 Info and Relationships (A)
  320	noImageRole missing role = 'img' on SVG element	Error	1.1.1 Non-text Content (A)
  321	noLinkText The link/button purpose cannot be determined from the link text and the page context. Screen reader users may not know the purpose of the link.	Error	2.4.4 Link Purpose (In Context) (A)
  322	noModalTitle the modal does not have a title	Error	4.1.2 Name, Role, Value (A)
  323	nonActiveElementInTabOrder An element that is focusable with the keyboard but has no role.	Error	4.1.2 Name, Role, Value (A)
  324	nonLayoutTableHasNestedTable Tables that are used for layout should not contain HTML table markup such as <th>, summary, and <caption>.	Error	1.3.1 Info and Relationships (A)
  325	noTitleSVG no title for the SVG	Error	1.1.1 Non-text Content (A)
  326	nullValueOnInput value attribute is empty - value attribute must either be non-empty or unspecifed for <input> elements with type = 'submit' or 'reset'	Error	4.1.2 Name, Role, Value (A)
  327	pageHasAutoRefresh The page has content that is automatically refreshed or updated. Users with cognitive or reading disabilities, low vision, or motor-control disabilities may be unable to access the content.	Error	2.2.1 Timing Adjustable (A)
  328	pageHasDelayedRedirect The page uses a delayed redirect. Some users of assistive technology may not have enough time to interact with elements on the page before the redirect occurs.	Error	2.2.1 Timing Adjustable (A)
  329	pageTitleHasUntitled The HTML <title> element contains placeholder text, such as 'untitled' or the file name. Page title s provide AT users with orientation information when the page initially loads.	Error	2.4.2 Page title d (A)
  330	pageTitleIsEmpty The HTML <title> element is missing. Page title s provide AT users with orientation information when the page initially loads.	Error	2.4.2 Page title d (A)
  331	placeholderUsedForLabel Placeholder text is used to provide the form label in form fields. This information disappears when the form field receives keyboard focus or when input is entered, so it is not communicated to screen reader users.	Error	2.4.6 Headings and Labels (AA)
  332	pseudoContent pseudo content found - ensure text alternative is provided when appropriate	Error	1.1.1 Non-text Content (A)
  333	requiredAttrOnRadioButton The aria-required attribute or HTML required attribute is used on a radio button.	Error	3.3.2 Labels or Instructions (A)
  334	requiredNotSemanticallyDefined the '*' character was detected in the label, indicating a required field, but the field is not semantically defined as being required	Error	4.1.2 Name, Role, Value (A)
  335	rolePresentationOnTableWithDataElements A table defined as a semantically nuetral table contains pertinent semantic table markup.	Error	1.3.1 Info and Relationships (A)
  336	svgMissingAriaLabelledby verify <svg> label	Error	1.1.1 Non-text Content (A)
  337	tabindexGreaterThanZero Elements are in the incorrect tab order. This limits the ability of keyboard and screen reader users to access page content in a logical order.	Error	2.4.3 Focus Order (A)
  338	tableCellHaScope Table data cells defined as <td> elements use the scope attribute.	Error	1.3.1 Info and Relationships (A)
  339	tableHeaderMissingScope The data table header cells have no scope attributes defined. Some screen readers may not interpret the relationship between the headers and data cells.	Error	1.3.1 Info and Relationships (A)
  340	targetLinkDoesNotExist The skip link is provided but the target of the href does not exist. This makes page navigation more difficult for screen reader and keyboard users.	Error	2.4.1 Bypass Blocks (A)
  341	targetNotFocusable An in-page or skip link is provided but the target is not focuable. This makes page navigation more difficult for screen reader and keyboard users.	Error	2.4.1 Bypass Blocks (A)
  	textWithBackgroundImage Unable to determine contrast of text on a background image or css generated background	Warning	1.4.3 Contrast (Minimum) (AA)
  342	usingAbstractRole An element uses an ARIA composite role.	Error	4.1.2 Name, Role, Value (A)
  343	visibleLabelWithHiddenInput form element with visible label has a hidden input	Error	4.1.2 Name, Role, Value (A)
  344	visibleModalSiblings content behind the modal can be read by screen readers	Error	1.3.2 Meaningful Sequence (A)
  345	zoomingDisabled The page text cannot be resized on mobile due to viewport settings. Low-vision users who rely on being able to increase size by at least 200% may not be able to access all content.	Error	1.4.4 Resize text (AA)
  346	1x1ImageAltText Images used for visual layout or spacing have alt-text. Images that convey no information should have no text in the alt attribute.	Alert	1.1.1 Non-text Content (A)
  347	accessKeyUsed accessKeysUsed	Alert	2.1.1 Keyboard (A)
  348	applicationFoundInbody The ARIA role=application" is set on the page <body> tag. This may complicate how screen reader users can interact with page content."	Alert	4.1.2 Name, Role, Value (A)
  349	ariaExpandedOnInvalidRole The aria-expanded attribute is incorrectly used. The aria-expanded attribute is to be set on the item/element which controls the expansion and collapse of another item. It does not get set on the item which is expanded or collapsed. The state is not accurately conveyed to screen readers.	Alert	4.1.2 Name, Role, Value (A)
  350	ARIAHiddenUsed Be sure that it is appropriate to hide this item from screen reader users.	Alert	4.1.2 Name, Role, Value (A)
  351	ARIAHiddenUsedOnFocusable An element that receives keyboard focus has aria-hidden=true" set on it. Nothing is announced by screen readers when the element receives keyboard focus. Sceen reader users will not know what the element is."	Alert	2.1.1 Keyboard (A)
  352	ARIAHiddenUsedOnParentOfFocusable aria-hidden='true' set on an element that contains focusable children	Alert	4.1.2 Name, Role, Value (A)
  353	ariaLabelOnInputImage aria-label or aria-labelledby found on an image button without an alt attribute	Alert	1.1.1 Non-text Content (A)
  354	ariaLevelOnHeading The aria-level attribute is set on a native HTML heading. This can complicate how some screen reader identify the heading level.	Alert	1.3.1 Info and Relationships (A)
  355	badLongdestTarget bad longdesc target	Alert	1.3.1 Info and Relationships (A)
  356	checkIfLinkTextNeeded no link text	Alert	2.4.4 Link Purpose (In Context) (A)
  357	dlUsed Definition list markup is used. Some screen readers will announce this as an unordered list. None of the semantic relationships will be conveyed to screen readers.	Alert	1.3.1 Info and Relationships (A)
  358	duplicateHeaders Heading text is duplicated. Screen reader users may find the page structure confusing, inaccurate, or hard to navigate unless the structure provides adequate differentiation between the duplicate headings.	Alert	2.4.6 Headings and Labels (AA)
  359	emptyList A list is present that contains no list items (<li>). Screen reader users may find the content structure confusing or difficult to navigate.	Alert	1.3.1 Info and Relationships (A)
  360	emptyListItem Empty list items (<li>) are present, which may be announced by screen readers. Screen reader users may find the content structure confusing or difficult to navigate.	Alert	1.3.1 Info and Relationships (A)
  361	framesetHasTitle Has title - Remove title from frameset. title attribute should be on frame elements	Alert	4.1.2 Name, Role, Value (A)
  362	h1InHeader An h1 heading is present in the page header/banner. This makes it more difficult for screen reader users to quickly locate the main page content.	Alert	2.4.1 Bypass Blocks (A)
  363	headingLevelMismatch The aria-level value does not match the HTML heading level.	Alert	1.3.1 Info and Relationships (A)
  364	headingLevelSkipped Heading levels are skipped or used out of order. Some screen reader users may find the page structure confusing, inaccurate or hard to navigate.	Alert	1.3.1 Info and Relationships (A)
  365	imgWithPresentationRole <img> has role of either 'presentation' or 'none'	Alert	1.1.1 Non-text Content (A)
  366	inputTypeIsEmail A form field uses input type=email". HTML5 form field validation is not fully supported for all assistive technology and browser combinations."	Alert	4.1.2 Name, Role, Value (A)
  367	labelTextVisibleTextMismatch The calculated name for the element does not match the visible text presented on the screen.	Alert	4.1.2 Name, Role, Value (A)
  368	legendNotFirstChild <legend> is not the first child of the <fieldset>	Alert	4.1.1 Parsing (A)
  369	lineBreakUsed line break used	Alert	1.3.1 Info and Relationships (A)
  370	linkTextContainsClick A link uses text of Click". This type of text is not necessary to include in a link. Screen reader users know that the link must be "clicked" to be activated."	Alert	2.4.4 Link Purpose (In Context) (A)
  371	linkTextMayNotBeDescriptive The purpose of the link may not be known to screen reader users.	Alert	2.4.4 Link Purpose (In Context) (A)
  372	missingBypassMethods missing methods to bypass blocks of content.	Alert	2.4.1 Bypass Blocks (A)
  373	missingHREF The link anchor has no href attribute	Alert	2.1.1 Keyboard (A)
  374	multipleFooterLandmarks There are multiple ARIA contentinfo landmarks or HTML5 footer elements used on the page.	Alert	2.4.1 Bypass Blocks (A)
  375	multipleH1 There are multiple <h1> heading elements on the page. Screen reader users may not be able to navigate easily to the main content of the page.	Alert	1.3.1 Info and Relationships (A)
  376	multipleHeaderLandmarks There are multiple ARIA banner landmarks or HTML5 header elements used on the page.	Alert	2.4.1 Bypass Blocks (A)
  377	multipleLabellingTechniquesUsed Multiple labeling techniques are used for a form control. Assistive technology may not provide correct information about the form control.	Alert	4.1.2 Name, Role, Value (A)
  378	nestedListNotNestedCorrectly An incorrectly nested list is present.	Alert	1.3.1 Info and Relationships (A)
  379	nestingFormLabelMissingId The checkbox/radio button form fields with visible text labels are associated with the text label by wrapping the label around the form field. Some screen readers may not be able to correctly associate text labels and form fields where nesting is the only way the label is associated with the form field (this is a screen reader/browser bug).	Alert	4.1.2 Name, Role, Value (A)
  380	noLegend A <fieldset> is defined that has no <legend>. The grouping information for the form fields will not be available to screen reader users.	Alert	4.1.2 Name, Role, Value (A)
  381	noMainLandmark The page does not contain a main ARIA landmark or HTML5 <main> element.	Alert	2.4.1 Bypass Blocks (A)
  382	noNavLandmark The page navigation is not defined with an ARIA landmark or HTML5 <nav> element. Screen reader users are not able to easily navigate back to the page navigation.	Alert	2.4.1 Bypass Blocks (A)
  383	nonDescriptiveLinkText A link uses text of Click Here" or "Here". The purpose of the link may not be known to screen reader users."	Alert	2.4.4 Link Purpose (In Context) (A)
  384	nonLayoutTableHasNestedTable Tables that are used for layout should not contain HTML table markup such as <th>, summary, and <caption>.	Alert	1.3.1 Info and Relationships (A)
  385	nonListItemChildOfList An element other than <li> is used as the first child element of a list. Some assistive technology may not imaprt correct list semantics to users.	Alert	4.1.1 Parsing (A)
  386	onlyOneListItem A list is present that has only one list item. The information conveyed to screen reader users may be misleading or confusing.	Alert	1.3.1 Info and Relationships (A)
  387	orphanedLabelNoMatchingIDAttribute orphaned form label - no matching id attribute	Alert	4.1.2 Name, Role, Value (A)
  388	placeholderDoesNotMatchLabel Placeholder text is used in a form that does not match the visual label text. This may cause confusion for screen reader users.	Alert	2.4.6 Headings and Labels (AA)
  389	possibleHTMLInTitle The HTML <title> element contains HTML markup. The markup will be read by screen readers when the page loads, which will be confusing for screen reader users and will not adequately describe the purpose of the page.	Alert	2.4.2 Page title d (A)
  390	problematicLinkText The image alt-text contains the image type or identifies the image as a graphic element (icon, jpeg, thumbnail, etc.). Images are already identified by assistive technology as graphic elements. Providing this additional information causes redundancy and increases the auditory load of the page for screen reader users.	Alert	1.1.1 Non-text Content (A)
  391	requiredIsIndicatedByHTML5Attribute A form control other than input type=radio" uses the HTML required attribute."	Alert	4.1.2 Name, Role, Value (A)
  392	SVGFocusable SVG elements are accessible with the keyboard when using Internet Explorer. When used in an active element, the element will have two tabs stops. One for the active element and one for the SVG.	Alert	2.1.1 Keyboard (A)
  393	titleOnLink The link text and the title attribute contain the same text. Screen readers may read this text twice.	Alert	2.4.4 Link Purpose (In Context) (A)
  394	unknownTablePurpose Table purpose is not known	Alert	1.3.1 Info and Relationships (A)
  395	verifyDefaultBrowserText No default button text specified - Verify the browser supplied text is appropriate	Alert	3.3.2 Labels or Instructions (A)
  396	titleOnNonActiveElement An inactive element is present that has a title attribute set on it	Alert	3.3.2 Labels or Instructions (A)
  397	boldUsed the text is formatted as bold text - if the bold text conveys meaning, add visually hidden text describing the meaning, or use a more appropriate element such as a heading	Alert	1.3.1 Info and Relationships (A)
  398	doesNotUsePUA character is not in the Private Use Area	Alert	4.1.1 Parsing (A)
  399	invalidARIADescribedbyID invalid aria-describedby id - ensure that the id values refer to a valid element	Error	4.1.2 Name, Role, Value (A)
  400	italicUsed the text is formatted as italic text - if the italic text conveys meaning, add visually hidden text describing the meaning	Alert	1.3.1 Info and Relationships (A)
  401	nonPUAContentInSameTextElement pseudo content found on text element, not in Private Use Area - add the pseudo content to its own span with aria-hidden='true'. Also, add a text alternative when appropriate	Error	1.1.1 Non-text Content (A)
  402	nonPUAContentOnActiveElement pseudo content is not hidden - add an aria-label to the clickable item to override the link text, or use a character in the Private Use Area	Error	1.1.1 Non-text Content (A)
  403	nonPUAContentOnNonActiveElement pseudo content found, not in Private Use Area - either add aria-hidden to the pseudo content or use content from the Private Use Area. Also, add a text alternative when appropriate	Error	1.1.1 Non-text Content (A)
  404	periodPseudoContent pseudo content found on text element, not in Private Use Area - If the '.' character is used for formatting, use ' ' (space) instead. Otherwise, add the pseudo content to its own span with aria-hidden='true'. Also, add a text alternative when appropriate.	Error	1.1.1 Non-text Content (A)
  405	pseudoContentActiveNotHidden pseudo content is not hidden - add an aria-label to the clickable item to override the link text, or put the pseudo content on a child span with aria-hidden='true' and use a character in the Private Use Area	Error	1.1.1 Non-text Content (A)
  406	pseudoContentCheckForAlternativeText pseudo content found - ensure text alternative is provided when appropriate	Alert	1.1.1 Non-text Content (A)
  407	pseudoContentNonActiveNotHidden pseudo content is not hidden - put the pseudo content on a child span with aria-hidden='true'	Error	1.1.1 Non-text Content (A)
  408	pseudoContentUsingURL an image was inserted with the CSS content property. This will be read as 'image' by some screen readers	Error	1.1.1 Non-text Content (A)
  409	specialCharactersUsed a non-alphanumeric character is used - remove the character, make it a background image, or use aria-hidden='true'	Alert	1.1.1 Non-text Content (A)
  410	strikeThroughUsed the text is formatted as strikethrough text - if the strikethrough text contains meaning, add visually hidden text describing the meaning	Alert	1.3.3 Sensory Characteristics (A)
  411	underlineUsed the text is formatted as underline text - if the underline text conveys meaning, add visually hidden text describing the meaning	Alert	1.3.3 Sensory Characteristics (A)