Developer – Quick Guide

Mission Statement

An accessibility role in development focuses on ensuring websites and applications are usable by everyone, including those with disabilities. Developers implement accessibility features, conduct audits, and provide guidance on best practices to improve the user experience for all. They work closely with designers, developers, and product teams to meet accessibility standards.

https://www.w3.org/WAI/planning/arrm/roles

1. Core Responsibilities

Non- negotiable developer responsibilities:

• Semantic HTML first: Prefer <button>, <nav>, <ul>, <input> etc. over divbased re- implementations.
• Keyboard operability: Every interactive element must be fully usable via keyboard.
• Focus management: Logical, visible focus; trap focus only in modals; always return focus.
• Accessible names & labels: Use visible labels, aria- label, aria- labelledby, alt.
• Proper ARIA usage: Add ARIA only when native semantics are insufficient.
• Error & status announcements: Provide correct programmatic messaging (ARIA- live, role=status, role=alert).
• Component- level behavior: Follow standard patterns for toggles, accordions, tabs, modals, menus.

2. Quick Checklist (Fast Access)

Top 7 checks before merge

• Semantics: Native HTML elements used where possible.
• Keyboard: Tab, Shift+Tab, Enter, Space, Arrow Keys behave as expected.
• Focus: Visible, custom- styled, no outline removed, correct order.
• ARIA sanity: No role=“button” on <div> unless absolutely necessary.
• Names & Labels: aria- label or visible label consistently applied.
• Announcements: Errors, success messages, toasts have proper ARIA- live regions.
• Media & Images: Alt attributes, captions, transcripts where relevant.

Done Right / Done Wrong

• ❌ <div role=“button“> → ✔ <button>
• ❌ Keyboard focus lost after modal close → ✔ Focus returns to
• triggering button
• ❌ Missing label on icon button → ✔ <button aria- label=“Search“>

3. Critical How- To Blocks

Semantic HTML

• Prefer native controls: <button>, <input>, <select>, <details>
• Use <fieldset> + <legend> for grouped inputs
• Use <label> with for binding
• Use structure tags (<nav>, <main>, <header>, <footer>, <section>, <article>)

ARIA – Do & Don’t

Do:

• aria- expanded for toggles
• aria- checked for switches/checkboxes
• role=“dialog“ + labelled title + focus management
• aria- live=“polite“ for status messages

Don’t:

• Don’t override native semantics with ARIA roles
• Don’t use ARIA when a native element solves it better
• Don’t misuse tabindex (only tabindex=“0″ for interactive elements, -1 for focus targets)

Focus Management

• On modal open: send focus to first interactive element
• On modal close: return focus to the origin
• Never remove focus outline unless you provide a strong custom replacement
• Logical focus order = DOM order

Keyboard Interactions

• Buttons: Enter + Space
• Links: Enter
• Toggles/Switches: Space toggles
• Tabs: Arrow keys to move, Enter/Space to activate
• Menus: Arrow keys + ESC
• Accordions: Enter/Space toggle, Up/Down switch items

5. Tools & Resources

Must- Use Tools

• axe DevTools (Deque Browser extension) https://www.deque.com/axe/
• BrowserStack Accessibility https://www.browserstack.com/
• WAVE Evaluation Tool https://wave.webaim.org
• ARC Toolkit (Deque) https://www.arc- toolkit.com/
• Chrome DevTools – Accessibility Tree https://developer.chrome.com/docs/devtools/accessibility

6. Patterns & Component Specifications

W3C Authoring Practices (APG) – THE developer bible https://www.w3.org/WAI/ARIA/apg

Use this for:

• Toggles, switches
• Tabs
• Accordions
• Dialogs
• Listboxes
• Menus
• Tooltips
• Sliders
• Breadcrumbs
• Carousels
• Advanced Patterns
• Smashing Magazine A11y Patterns Smashing Magazine – Complete guide accessible Frontend-Components
• Smashing Magazine – Inclusive components release

7. Code Examples & Snippets

• Accessible Modal Starter
• Accessible Tabs
• Accessible Accordion
• Accessible Tooltip
• Error Announcements

8. Keyboard Navigation & Screen Reader

Keyboard Navigation & Focus

A11yCasts What is focus?

A11yCasts explains Keyboard Navigation Part 1

A11yCasts explains Keyboard Navigation Part 2

A11yCasts explains Headings and Landmarks

Screen Reader

Shortcuts Screen Reader (VoiceOver) Desktop

VoiceOver (macOS) Official guide & shortcuts

• Command + F5: Start/ End VoiceOver
• Control: Stop reading
• Control + Option + Command + H: Next heading
• Control + Option + Command + J: Next form field
• Control + Option + U – opens: VoiceOver- Menue In Menue Jump between sections & landmarks, headings, links, form fields, etc.

A11yCasts explains Screen reader basics VoiceOver MacOS

A11yCasts explains VoiceOver Mobile iOS

Talkback (Adroid Screenreader)

A11yCasts explains TalkBack Mobile

Windows Screenreader

• NVDA (Windows) NVDA Developer Guide
• JAWS JAWS keyboard commands

Developers should be able to run a 30- second smoke test.