Frontend + AI internals
Deep technical breakdowns for engineers who want the mechanics, tradeoffs, and weird browser or AI behavior beneath the abstraction.
Technical breakdowns
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New posts and selected archive entries from the canonical Under The Hood home.
Angular
Unpack the Angular Signals reactivity model, how signals track dependencies, how they interact with Angular’s change detection, and debugging strategies for reactive state bugs in production apps.
Accessibility
Explore patterns and internal mechanisms design systems use to ensure accessible focus management across components, how they integrate with ARIA, and debugging mismatches between system defaults and app overrides.
React
Explore how React’s useTransition hook works under the hood to defer state updates, how it interacts with concurrent rendering, and when to use it for optimal user experience and performance.
Accessibility
Analyze how popular design systems implement focus management internally, common focus trap bugs, and debugging focus-related accessibility issues in complex component trees.
Accessibility
A deep dive into browser focus management when using tabindex -1 and aria-activedescendant, explaining the underlying mechanisms, tradeoffs for accessibility, and debugging focus issues in complex widgets.
Accessibility
Explore how Shadow DOM impacts the accessibility tree construction, issues with screen readers interpreting shadow boundaries, and strategies to debug and fix accessibility in web components.