Web-Dev

As web developers, we’re not just building features and creating seamless user experiences – we’re also the first line of defense against cyber threats. In this post, I’ll walk you through the essential security practices that every web developer should implement in their projects. Input Validation and Sanitization The oldest trick in the book remains one of the most critical security measures. Never trust user input. Whether it’s form data, URL parameters, or API requests, always validate and sanitize user input before processing it. ...

Web Performance Fundamentals Performance optimization is crucial for user experience and SEO. Key Performance Metrics First Contentful Paint (FCP) Largest Contentful Paint (LCP) Time to Interactive (TTI) Cumulative Layout Shift (CLS) Image Optimization <!-- Responsive images --> <picture> <source srcset="image-large.webp 1200w, image-medium.webp 800w, image-small.webp 400w" sizes="(max-width: 400px) 400px, (max-width: 800px) 800px, 1200px" type="image/webp"> <img src="image-fallback.jpg" alt="Optimized image" loading="lazy" width="800" height="600"> </picture> JavaScript Performance // Code splitting example const MyComponent = React.lazy(() => import('./MyComponent')); // Efficient list rendering const List = memo(({ items }) => ( <div> {items.map(item => ( <div key={item.id}> {item.name} </div> ))} </div> )); // Debounce expensive operations const debouncedSearch = debounce((query) => { performSearch(query); }, 300); Performance Checklist Asset Optimization ...