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1.1.1: Non-Text Content

• Applet Missing Text
• Applet Missing alt Attribute
• Area element missing alternative text
• Empty aria-label Attribute
• Empty title attribute
• Image Inside Link Missing Alternative Text
• Image has a null alt
• Image missing alt attribute
• Image suspected of redundant alt attribute
• Input type='image' Missing Alternative Text
• Label's for Attribute Contains An ID That Does Not Exist In The Document
• Missing <noembed> Element Inside An <embed> Element
• Object element is missing a text alternative
• The Label's for Attribute References An Element That Is Not A Form Control
• The alt Attribute Is Too Long
• The alt Attribute Is Too Short
• Title attribute cannot be used for image with empty alt attribute
• Image Element Missing alt Attribute
• Invalid aria-describedby on image

1.2.2: Captions (Prerecorded)

1.2.3: Audio Description or Media Alternative (Prerecorded)

• Object element is missing a text alternative

1.3.1: Info and Relationships

• The element is suspected to perform as a numbered list
• The element is suspected to perform as an unordered list
• Empty Heading
• Empty title attribute
• Field's attribute aria-labelledby references to not existing element
• Fieldset missing a legend
• Group of radio buttons missing fieldset
• Group options elements inside a select
• Label's for Attribute Contains An ID That Does Not Exist In The Document
• Layout Table Shouldn’t Use <caption>
• Missing H1 heading
• Misused emphasis markup
• Suspected misuse of table summary attribute
• The <h> elements are not structured in a logical nested way
• The Label's for Attribute References An Element That Is Not A Form Control
• Duplicate main landmark
• Group of checkboxes missing fieldset
• Incorrect value in scope attribute
• Indentify a font icon semantically
• Invalid aria-describedby on UI control
• Missing main landmark
• Scope attribute is used on wrong element
• Summary should not duplicate caption

1.3.5: Identify Input Purpose

• Incorrect autocomplete attribute value

1.4.2: Audio Control

• Element is suspected to miss stop functionality

1.4.3: Contrast (Minimum)

• A text color does not have enough contrast with the background image or color

1.4.4: Resize text

• Page is not responsive
• Page is not scalable
• Page is not scalable to 200%
• Page is scaled incorrectly

2.1.1: Keyboard

• Audio or video element suspected for keyboard trap
• Button Element Is Missing Content
• Document Body Hidden
• HTML element cannot be accessed by keyboard
• Input Element Missing Value Attribute
• Link Element Has No Content
• Missing keyboard blur event
• Missing keyboard focus event
• Missing keyboard focus event
• Missing keyboard press event
• No Initial Option Selected For Select Element

2.1.2: No Keyboard Trap

• Audio or video element suspected for keyboard trap

2.2.1: Timing Adjustable

• Page refresh automatically without prior notification
• Page redirect without prior notification

2.2.2: Pause, Stop, Hide

• Use of <blink> element

2.4.1: Bypass Blocks

• Area element links to not existing element
• Iframe element missing title attribute
• Invalid link
• Duplicate main landmark
• Missing main landmark

2.4.2: Page Titled

• Empty Document Title
• Missing Document Title

2.4.4: Link Purpose (In Context)

• Area element missing alternative text
• Image Inside Link Missing Alternative Text
• Image suspected of redundant alt attribute
• Link's aria-labelledby Attribute Does Not References An Existing Element

3.1.1: Language of Page

• Document is missing lang attribute
• Document uses incorrect lang attribute
• Document uses incorrect xml:lang attribute

3.1.2: Language of Parts

• Element uses an incorrect lang attribute
• Element uses an incorrect xml:lang attribute

3.2.2: On Input

• Form Is Missing <submit> Button

4.1.1: Parsing

• Duplicate ID

4.1.2: Name, Role, Value

• <ul> Element Has Invalid Child Element(s)
• ARIA role attribute misuse
• Attribute does not exist in WAI-ARIA specification
• Button Element Is Missing Content
• Empty title attribute
• Form field is missing label
• Iframe element missing title attribute
• Input Element Missing Value Attribute
• Label's for Attribute Contains An ID That Does Not Exist In The Document
• Link Element Has No Content
• Marquee element should not be used
• No Initial Option Selected For Select Element
• The Label's for Attribute References An Element That Is Not A Form Control
• User interface component missing a role describing its function
• WAI-ARIA attribute mismatch
• Wrong ARIA role attribute's value
• dd element is misused
• dl element is misused
• dt element is misused
• li element is misused
• ARIA role inside widget element
• Id attribute is invalid
• Incorrect ARIA attribute value