Tag
wcag
- Sep 11, 2026 Why Zero Violations Is Not a Pass Automated checks cover a minority of success criteria, report a large incomplete queue, and cannot observe interaction, so a clean run bounds failure rather than proving conformance. accessibility
- Jun 19, 2026 Conformance Evidence and Defect Triage How to assemble a defensible accessibility claim: sampling by template, recording scope and exceptions, ranking defects by user impact, and keeping the evidence current. accessibility
- Jan 2, 2026 Which Boundary Counts for Non-Text Contrast and Focus Indicators How the 3:1 requirement applies to component edges, icons, and focus rings, why the measured pair is the two colors on either side of a boundary, and how state changes are evaluated separately. accessibility
- Dec 22, 2025 What an Automated Accessibility Check Can Decide Which accessibility questions resolve from the serialized DOM and computed style, which require judging meaning, and why an engine cannot tell the difference on its own. accessibility
- Nov 17, 2025 How an Accessibility Rule Engine Decides The parse, match, evaluate, and report stages inside a checker like axe-core, how rule results are graded, and why the same page yields different reports from different tools. accessibility
- Jul 18, 2025 Computing the Flash Threshold: Luminance Steps, Area, and the Red Flash Rule Photosensitive seizures depend on the size, luminance delta, and frequency of a flashing region; how the general and red flash thresholds are defined, and why a small bright animation is a different risk from a full-screen one. accessibility
- Feb 27, 2025 Testing Reflow, Zoom, and Text Spacing How the reflow, resize-text, and text-spacing criteria turn layout questions into arithmetic on viewport width, scroll extents, and computed font metrics. accessibility
- Oct 2, 2024 Measuring Contrast From Rendered Pixels Why the contrast ratio is simple arithmetic but the colour inputs are not, how effective backgrounds are composited, and what sampling rendered pixels can and cannot settle. accessibility
- Oct 17, 2023 Computing Relative Luminance and Contrast Ratios from sRGB Values The linearisation step, the weighted sum behind relative luminance, and why the WCAG ratio adds a constant to both values before dividing them. accessibility