CSS contrast-color(): Letting the Browser Solve Accessible Contrast for You
contrast-color() reached Baseline Newly Available in April 2026. Here's what the function actually guarantees, where mid-tone backgrounds break it, and how to …
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WCAG 2.1 for Developers: Success Criteria and What They Require
A developer-focused reference for WCAG 2.1 — what the 17 new success criteria added in 2.1 require, how they relate to 2.0, and what Level AA conformance means …
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The HTML Document Outline: Headings, Sections, and Hierarchy
How heading levels and HTML5 sectioning elements create document structure, what the proposed outline algorithm was and why it failed, and how to build heading …
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Accessible HTML Forms: Labels, Errors, and Focus Management
How to build forms that work for everyone — label association, error messaging patterns, fieldset and legend for grouped controls, and the focus management that …
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CSS Animations and Transitions: When Motion Helps
The mechanics of CSS transitions and animations — timing functions, the compositing layer, prefers-reduced-motion, and the design principles that distinguish …
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WCAG 2.2 for Developers: What Changed and What It Means
The nine new and modified success criteria in WCAG 2.2 — what each requires, why it was added, and how to implement it in real interfaces.
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ARIA Roles in Practice: When to Use Them and When Not To
The first rule of ARIA — use native HTML — and when ARIA roles are actually necessary: the patterns where native HTML falls short and assistive technology needs …
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Progressive Enhancement as a Design Discipline
What progressive enhancement actually means in practice — not a nostalgic HTML-first dogma, but a structural approach to building interfaces that work for more …
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<abbr> and Acronyms in HTML: Semantics for Shortened Terms
How to mark up abbreviations and acronyms in HTML correctly — what the abbr element does, when to use title attributes, screen reader behavior, and the …
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Color Contrast and WCAG: What the Ratio Numbers Mean
How WCAG contrast ratios are calculated, what the 4.5:1 and 3:1 thresholds actually require, where the formula breaks down, and practical tooling for making …
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Testing with Lynx: What Text-Based Browsing Reveals About Your HTML
How testing with the Lynx text browser exposes structural weaknesses in HTML that visual browsers hide — and why the fixes make every user's experience better.
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Semantics, HTML, and Document Structure
How semantic HTML elements — article, section, nav, aside, main — shape document structure, accessibility, and the user experience of every interface.
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ARIA Landmark Roles: Structuring Pages for Assistive Technology Navigation
How ARIA landmark roles and their HTML5 element equivalents let screen reader users jump directly to a page's main regions instead of tabbing through …
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