User interface development, responsive design, and browser technologies.
Use mobile-first CSS with media queries, flexible layouts with Flexbox/Grid, relative units, and test on real devices.
Prefer CSS for visual styling, animations, and transitions. Use JavaScript when you need complex logic, user input handling, or state management.
Web Vitals are metrics measuring real-world user experience: loading performance, interactivity, and visual stability.
Key techniques include code splitting, lazy loading, image optimization, caching strategies, and minimizing render-blocking resources.
Semantic HTML, keyboard navigation, ARIA labels where needed, color contrast, and alt text ensure everyone can use your site.
The Critical Rendering Path is the sequence of steps the browser takes to convert HTML, CSS, and JavaScript into pixels on screen.
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