Cross-Platform Development

A toast notification is a small, non-intrusive message that appears briefly on screen — usually at the top or bottom — to provide feedback about an action without interrupting the user's workflow. Unlike modals, toasts auto-dismiss after a few seconds and don't require user interaction. They are commonly used to confirm saves, report errors, or show status updates. Accessible implementations include ARIA live regions so screen readers announce the message.

Semantic HTML means using HTML elements that clearly describe their meaning and purpose, such as `<article>`, `<nav>`, `<header>`, and `<section>`, instead of generic `<div>` tags. This practice improves accessibility for screen readers, boosts SEO by helping search engines understand page structure, and makes code far more readable for other developers. It's considered a foundational best practice in modern web development.

Accessibility (often abbreviated a11y) is the practice of designing and building websites and apps so they can be used by everyone, including people with visual, motor, auditory, or cognitive disabilities. This involves proper semantic markup, keyboard navigation support, sufficient color contrast, and screen reader compatibility. Beyond being an ethical responsibility, accessibility is increasingly a legal requirement in many jurisdictions.

The View Transitions API is a browser-native way to create animated transitions between different DOM states or page navigations, previously only possible with complex JavaScript animation libraries. It captures a snapshot of the current state, applies the DOM update, then animates between the old and new snapshots using CSS. This API works for both single-page app state changes and multi-page navigations, enabling smooth page transitions with minimal code that feels native to the platform.

Media queries are a CSS feature that allows you to apply styles conditionally based on device characteristics like viewport width, height, orientation, color scheme preference, or reduced motion settings. They are the backbone of responsive web design, enabling different layouts for mobile, tablet, and desktop screens. Modern media queries also support user preference detection with `prefers-color-scheme` and `prefers-reduced-motion` for more accessible experiences.

React Native is a framework for building native mobile applications for iOS and Android using React and JavaScript/TypeScript. Unlike hybrid approaches that render in a WebView, React Native maps React components to actual native platform UI elements, providing native look, feel, and performance. Its "learn once, write anywhere" philosophy allows web developers to leverage their React knowledge for mobile development while still accessing platform-specific APIs when needed.