Issues
Accessibility: Best Practice – Elements Must Not Have Tabindex Greater Than Zero
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- Indexable
- PageSpeed
- Eliminate Render-Blocking Resources
- Properly Size Images
- Defer Offscreen Images
- Minify CSS
- Minify JavaScript
- Reduce Unused CSS
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- Efficiently Encode Images
- Serve Images in Next-Gen Formats
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- Accessibility
- Best Practice – Accesskey Attribute Value Must Be Unique
- Best Practice – Elements Must Not Have Tabindex Greater Than Zero
- Best Practice – ARIA Dialog & Alertdialog Require Accessible Name
- Best Practice – ARIA Treeitem Nodes Require Accessible Name
- Best Practice – Role=text Should Have No Focusable Descendants
- Best Practice – Form Elements Should Have Visible Label
- Best Practice – Frames Should Be Tested With axe-core
- Best Practice – Scope Attribute Should Be Used Correctly On Tables
- WCAG 2.0 A – Scrollable Region Requires Keyboard Access
- WCAG 2.0 A – Required ARIA Attributes Must Be Provided
- WCAG 2.0 A – ARIA Attribute Must Be Used As Specified For Role
- WCAG 2.0 A – ARIA Attributes Require Valid Values
- WCAG 2.0 A – ARIA Attributes Require Valid Names
- WCAG 2.0 A – ARIA Commands Require Accessible Name
- WCAG 2.0 A – ARIA Input Fields Require Accessible Name
- WCAG 2.0 A – ARIA Meter Nodes Require Accessible Name
- WCAG 2.0 A – ARIA Progressbar Nodes Require Accessible Name
- WCAG 2.0 A – ARIA Roles Must Be Contained By Required Parent
- WCAG 2.0 A – ARIA Roles Require Valid Values
- WCAG 2.0 A – ARIA Toggle Fields Require Accessible Name
- WCAG 2.0 A – ARIA Tooltip Nodes Require Accessible Name
- WCAG 2.0 A – Certain ARIA Roles Must Contain Specific Children
- WCAG 2.0 A – Aria-braille Require Non-braille Equivalent
- WCAG 2.0 A – Aria-hidden Elements Contains Focusable Elements
- WCAG 2.0 A – Aria-hidden=true Must Not Be Used In <body>
- WCAG 2.0 A – Elements Must Only Use Permitted ARIA Attributes
- WCAG 2.0 A – Elements Must Use Allowed ARIA Attributes
- WCAG 2.0 A – IDs Used In ARIA & Labels Must Be Unique
- WCAG 2.0 A – Page Requires Means To Bypass Repeated Blocks
- WCAG 2.0 A – Form <input> Elements Require Labels
- WCAG 2.0 A – Frames Require Title Attribute
- WCAG 2.0 A – Frames Require Unique Title Attribute
- WCAG 2.0 A – Frames With Focusable Content Must Not Use tabindex=-1
- WCAG 2.0 A – Page Must Contain <title>
- WCAG 2.0 A – HTML Element Lang Attribute Value Must Be Valid
- WCAG 2.0 A – HTML Element Requires Lang Attribute
- WCAG 2.0 A – Image Button Requires Alternate Text
- WCAG 2.0 A – Images Require Alternate Text
- WCAG 2.0 A – <object> Elements Require Alternate Text
- WCAG 2.0 A – Active <area> Elements Require Alternate Text
- WCAG 2.0 A – Elements Marked role=img Require Alternate Text
- WCAG 2.0 A – SVG Images & Graphics Require Accessible Text
- WCAG 2.0 A – <video> Elements Require <track> For Captions
- WCAG 2.0 A – <video> or <audio> Elements Must Not Auto-play
- WCAG 2.0 A – Buttons Require Discernible Text
- WCAG 2.0 A – Input Buttons Require Discernible Text
- WCAG 2.0 A – Links Require Discernible Text
- WCAG 2.0 A – Links Must Be Distinguishable
- WCAG 2.0 A – Select Element Requires Accessible Name
- WCAG 2.0 A – Summary Elements Require Discernible Text
- WCAG 2.0 A – Deprecated <marquee> Element Must Not Be Used
- WCAG 2.0 A – Interactive Controls Must Not Be Nested
- WCAG 2.0 A – List Items Must Be Contained In List Elements
- WCAG 2.0 A – Lists Must Only Contain <li> Content Elements
- WCAG 2.0 A – <dt> & <dd> Elements Must Be Contained by <dl>
- WCAG 2.0 A – <dl> Must Only Have Ordered <dt> & <dd> Groups
- WCAG 2.0 A – <blink> Elements Deprecated & Must Not Be Used
- WCAG 2.0 A – <th> Element Requires Associated Data Cells
- WCAG 2.0 A – Table Header Attr Must Refer To Cell In Same Table
- WCAG 2.0 AA – Meta Viewport Zoom & Scaling Disabled
- WCAG 2.0 AA – Lang Attribute Requires Valid Value
- WCAG 2.0 AA – Text Requires Higher Color Contrast to Background
- WCAG 2.0 AAA – Text Requires Higher Color Contrast Ratio
- WCAG 2.1 AA – Autocomplete Attribute Must Be Used Correctly
- WCAG 2.1 AA – Inline Text Spacing Must Be Adjustable
- WCAG 2.2 AA – Touch Targets Require Sufficient Size & Spacing
- Best Practice – Skip-link Target Should Exist & Be Focusable
- Best Practice – All Page Content Must Be Contained By Landmarks
- Best Practice – Page Requires One Main Landmark
- Best Practice – Page Must Not Have More Than One Banner Landmark
- Best Practice – Banner Landmark Must Not Be In Another Landmark
- Best Practice – Page Must Not Have Multiple Contentinfo Landmarks
- Best Practice – Page Requires At Most One Main Landmark
- Best Practice – Complementary Landmarks & Asides Must Be Top Level
- Best Practice – Contentinfo Landmark Must Be Top Level Landmark
- Best Practice – Main Landmark Must Not Be In Another Landmark
- Best Practice – Landmarks Require Unique Role Or Accessible Name
- Best Practice – Page Must Contain <h1>
- Best Practice – Heading Levels Should Only Increase By One
- WCAG 2.0 A – Form Field Must Not Have Multiple Label Elements
- WCAG 2.0 A – HTML Lang & XML Lang Value Should Match
- Best Practice – Ensure Elements Marked Presentational Are Ignored
- Best Practice – ARIA Role Should Be Appropriate For Element
- Best Practice – Headings Should Not Be Empty
- Best Practice – Meta Viewport Should Allow Zoom & Scale Up to 500%
- Best Practice – Alt Text Should Not Be Repeated As Text
- Best Practice – Table Headers Require Discernible Text
- Best Practice – Table With Identical Summary & Caption Text
- WCAG 2.0 A – Deprecated ARIA Roles Must Not Be Used
- WCAG 2.0 A – Server-Side Image Maps Must Not Be Used
- WCAG 2.0 AAA – Delayed Meta Refresh Must Not Be Used
- WCAG 2.0 AAA – Links With Same Accessible Name
Best Practice – Elements Must Not Have Tabindex Greater Than Zero
A tabindex attribute must never have a value greater than 0 to prevent an unexpected tab order that can give the appearance of skipping some elements entirely.
How to Analyse in the SEO Spider
To populate this filter ‘Accessibility’ must be enabled via ‘Config > Spider > Extraction’ and ‘JavaScript rendering’ mode via ‘Config > Spider > Rendering’.
View URLs with this issue in the ‘Accessibility’ tab and ‘Elements Must Not Have Tabindex Greater Than Zero’ filter.
Use the lower ‘Accessibility Details’ tab to click on the issue on the left-hand side, and see details of the location on the page of the violation on the right-hand side.
Bulk export the pages and details of the accessibility violations via ‘Bulk Export > Accessibility > All Violations’.
What Triggers This Issue
Please view the Deque University website further reading link below for ruleset triggers.
How To Fix
Ensure tabindex attribute values are not greater than 0.
Further Reading
- Elements should not have tabindex greater than zero - From Deque University