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Accessibility Developer Guide
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Introduction
How to use
About
License
Privacy Policy
Setup
Windows as OS
Why?
Virtual Machines
VMware on macOS
VMware on Windows & Linux
Browsers
Firefox
Chrome
Edge
Screen readers
VoiceOver/iOS
TalkBack
NVDA
JAWS
(current page)
Helper tools
Browser extensions
Web Developer toolbar
WAVE toolbar
HeadingsMap
axe DevTools
Bookmarklets
Contents Structured
h123
HTML_CodeSniffer
Colour Contrast Analyser
PDF Accessibility Checker
High Contrast Mode
Knowledge
Colours & contrast
How to calculate
How to examine
Colour contrast for text
Colour contrast for UI components
Colour contrast for graphical objects
Colour is not enough
Semantics
Meaning
Interaction
Widgets
ARIA
Purpose
Bad practices
Keyboard only
Controlling a computer
Browsing websites
Skip navigation links
How to implement
Screen readers
What and why
Relevant combinations
Linear processing using cursor
No visual attributes
Mobile: VoiceOver/iOS & TalkBack
Reading websites
Interacting with websites
Desktop: NVDA & JAWS
Browse & focus modes
The Insert modifier key
Reading websites
Interacting with websites
Keyboard shortcuts
How to implement
So buggy!
Web Components
Legal requirements
European Accessibility Act
Examples
HTML Boilerplate
Hiding elements
Visually
From screen readers
From all devices
Skip links
Okay for SEO?
Headings
Handling
Good example
Bad example
Visually hidden headings
Multiple h1 okay for SEO?
Alternative techniques
HTML 5 outline
Iframes
Tables
Handling
Good example
Bad examples
Multiple headers
Spanning rows & cols
Layout changes
Responsive
"Table of divs" experiment
Hidden headers
Sticky headers
Forms
Handling
Good example
Bad example
Grouping with fieldset/legend
Grouping with headings
Non-interactive content
Validation messages
Required (*)
HTML 5 validations
In tables
Widgets
Proof of concept?
Tooltips
Tablists
Carousel
Accordion
Autosuggest
Dropdown
Dialog
Datepicker
Sensible ARIA usage
Label & labelledby
Describedby
Expanded
Pressed
Current
Hidden
Presentation
Alert
Contribution
Signia Connexx Software Work Download Verified May 2026