Accessible Data Interfaces
A practical, implementation-focused reference for building WCAG 2.2-compliant data UIs. Real patterns, working code — for tables, grids, charts, keyboard navigation, and ARIA.
Four sections, twenty-three topic guides and more than fifty step-by-step walkthroughs, each with annotated code, keyboard contracts and screen reader behaviour notes.
Built for frontend engineers, UX specialists, a11y consultants, and design system maintainers who ship production-grade accessible data experiences.
What's Inside
Accessible Data Tables & Grid Systems
Semantic HTML tables, sortable and filterable grids, expandable treegrids, inline editing, bulk selection, keyboard-operable column resizing and result-set pagination — all with complete ARIA mapping and keyboard interaction patterns.
ExploreCore ARIA & Keyboard Navigation
ARIA live regions, focus management in SPAs, roving tabindex, focus trapping, faceted filtering and screen reader announcement strategies — with NVDA, JAWS, and VoiceOver notes.
ExploreVirtualization, Charts & Dynamic Data
Accessible virtual lists, D3 and canvas chart alternatives, DOM size tradeoffs, progressive loading states and real-time data stream announcements — bridging performance with inclusive access.
ExploreTesting & Auditing Accessible Data Interfaces
Automated axe-core CI pipelines, screen reader smoke tests, focus-indicator contrast auditing, and the NVDA / JAWS / VoiceOver / TalkBack behaviour differences engineers hit when debugging data UIs.
ExploreStart Here
If you're new to accessible data UIs, these pages cover the highest-impact patterns most commonly failing accessibility audits in data-heavy applications.
scope and headers in complex tables
The single most common table accessibility failure. Learn when to use scope="col", scope="row", and headers on merged or multi-level header structures.
polite vs. assertive aria-live regions
Choosing the wrong politeness level is a common ARIA mistake. This guide explains exactly when each mode is appropriate and how to avoid interrupting screen reader users.
Read guidearia-sort for sortable column headers
How to implement aria-sort on column headers so screen readers announce sort state correctly — including the timing of DOM updates relative to the sort reorder.
roving tabindex for custom data grids
Step-by-step implementation of the roving tabindex pattern for keyboard navigation inside a grid widget — covering arrow keys, Home/End, and focus restoration after DOM mutations.
Read guidemaking react-window accessible
Virtualized lists recycle DOM nodes, which breaks screen reader linear reading. This guide patches the missing accessibility hooks in react-window with working code.
Read guiderestoring focus after closing modals
Focus loss after a modal closes is a WCAG 2.4.3 failure. This guide covers the focus-restoration logic for dialogs that delete or modify the element that originally triggered them.
Read guideNVDA vs JAWS: aria-sort differences
The same aria-sort markup is announced differently by NVDA and JAWS. This guide documents each behaviour, the timing relative to DOM reorder, and how to test for the discrepancy.
axe-core in a GitHub Actions pipeline
Catch accessibility regressions before they merge. A complete CI workflow that runs axe-core against your built data UIs and fails the build on new violations.
Read guideaccessible sortable table in React
A production-ready React sortable table: aria-sort state, a polite live region for sort announcements, keyboard activation, and focus preservation after re-sort.
Latest Additions
The newest walkthroughs, covering column manipulation, result-set navigation, faceted filtering, loading states and the testing techniques that catch what automated rules cannot.
Keyboard-accessible column resizing
Turn a two-pixel drag handle into a real control with role="separator" and arrow-key stepping.
Load more vs. infinite scroll
Why scroll-triggered loading cannot be made accessible, and what to build instead.
Announcing filter result counts
One debounced message per settled query, naming the count, the total and the filters.
aria-busy during progressive loads
What it actually suppresses, and the frame gap VoiceOver needs before the settle message.
JAWS virtual cursor vs. forms mode
Why your arrow-key handlers never fire, and how the mode decides your role choice.
Automating focus indicator capture
Measure the 3:1 ratio from real pixels, in both colour schemes, on every build.
All Topics
Data Tables & Grid Systems
ARIA & Keyboard Navigation
Charts & Virtualization
Why Accessible Data Interfaces?
Most accessibility resources focus on simple UI elements — buttons, forms, links. But enterprise data applications present a different class of challenge: tables with hundreds of rows, charts that visualise real-time streams, virtualized lists that recycle DOM nodes, and grids with inline editing and keyboard-driven bulk operations.
This reference documents the specific WCAG 2.2 success criteria, ARIA roles, and keyboard interaction patterns that apply to these complex data UIs. Every pattern is drawn from production experience and tested against NVDA, JAWS, and VoiceOver.
Each guide includes implementation checklists, working code samples, and explicit screen reader behaviour descriptions so you can build confidently and audit thoroughly.
Every page carries hand-drawn diagrams of the pattern it teaches, and the whole reference ships in a light and a dark theme that both meet AA contrast — including the interiors of the diagrams themselves.