Performance & Accessibility
How to Get Largest Contentful Paint Right
The time until the largest image or text block in the viewport has rendered — a proxy for when a page looks loaded. Key takeaways Good: 2.5 seconds or less Need...
Lumexa Media · Writing
Performance & Accessibility
Core Web Vitals, WCAG conformance and the audit trail that proves both.
163 articles in Performance & Accessibility · every discipline
Performance & Accessibility
Interaction to Next Paint: The Decisions That Matter
A measure of responsiveness: how long a page takes to render a visual response after a user interaction. Key takeaways Good: 200 milliseconds or less Needs impr...
Performance & Accessibility
Cumulative Layout Shift, Done Properly
A measure of how much visible content moves unexpectedly during a page's life. Key takeaways Good: 0.1 or less Needs improvement: between 0.1 and 0.25 Most...
Performance & Accessibility
How to Get WCAG Conformance Levels Right
The three levels of the Web Content Accessibility Guidelines — A, AA and AAA — and what claiming one actually commits you to. Key takeaways Levels: A, AA and AA...
Performance & Accessibility
Keyboard Accessibility, Done Properly
Making every function of a site operable with a keyboard alone, in a logical order, with visible focus. Key takeaways Requirement: all functionality available f...
Performance & Accessibility
How to Get Screen Reader Compatibility Right
Making sure content is announced usefully by the software that reads a page aloud. Key takeaways Common combinations: each screen reader behaves differently wit...
Performance & Accessibility
Color Contrast: The Decisions That Matter
The measurable difference in luminance between foreground and background, and the thresholds content must meet. Key takeaways Normal text, AA: 4.5:1 Large text,...
Performance & Accessibility
How to Get Performance Budgets Right
Agreed limits on page weight, request count or timing metrics, enforced automatically so they cannot be quietly exceeded. Key takeaways Budget types: resource s...
Performance & Accessibility
How to Get Critical Rendering Path Right
The sequence of work a browser must complete before it can render anything useful. Key takeaways Steps: HTML parsing, CSS object model construction, render tree...
Performance & Accessibility
HTTP/2 and HTTP/3, Done Properly
The newer versions of the protocol that carries web traffic, and what they change about how resources should be delivered. Key takeaways HTTP/2: multiplexing ov...
Performance & Accessibility
Content Delivery Networks: What Actually Works
Distributed servers that hold copies of your content close to the people requesting it. Key takeaways Benefit: reduced latency, offloaded origin traffic and oft...
Performance & Accessibility
Real User Monitoring: What Actually Works
Collecting performance data from actual visits rather than from synthetic tests. Key takeaways Field data: collected from real visits, segmented by device and c...
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