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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
See Also
User1st.com
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> 1.4.2 Audio Control
1.4.2 Audio Control
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Element is suspected to miss stop functionality