HTML
Semantic structure, forms, headings, ARIA, buttons vs links, and native-first delivery.
CSS
LSCSS methodology, architecture, variables, layers, scope, and maintainable styling systems.
JavaScript
Progressive enhancement, native behaviour, modules, readability, testing, and performance-aware code.
Code Formatting and Style
4-space indent; CSS, HTML, and JS/TS formatting rules; formatter plus review; examples for real delivery.
Accessibility
Keyboard access, focus, screen readers, reduced motion, forms, and accessibility by default.
Performance
Page weight, Core Web Vitals, images, fonts, JavaScript budgets, and third-party risk.
Standards
Shared rules for how teams build HTML, CSS, JavaScript, accessibility, and performance consistently.