Gouranga Das Samrat

  “A slow website is a dead website.” Let’s be honest — no one likes waiting. Not you, not your users. Especially not your client staring at bounce rates. In 2025, front-end performance isn’t a nice-to-have; it’s survival. Page speed affects everything: SEO rankings, conversion rates, and user satisfaction. But fixing performance isn’t always about rewriting everything. Sometimes, small tweaks can lead to huge gains. In this article, I’ll walk you through 13 powerful front-end performance optimizations that you can (and should) apply today. Each one comes with a clear example so you can start improving immediately. 1. Compress and Optimize Images Problem: Large images are the number one reason websites feel sluggish. Solution: Use modern image formats like WebP or AVIF , compress images before uploading, and lazy load them where possible. Example: Instead of: < img src = "hero.jpg" /> Use: < img src = "hero.webp" loading = "lazy" width =...

  JavaScript’s built-in functions are your Swiss Army knife for daily coding tasks and technical interviews. Beyond the basics, here are some powerful functions with real-world applications. Math Math.random() Use: Generate random numbers Case: OTP generation, random sampling Math.floor()  vs  Math.ceil() Use: Precise number handling Case: Pagination, financial calculations Math.max() / Math.min() Use: Find extremes in datasets Case: Data analysis, validation Math.abs(x) Use: Absolute value Case: Distance calculations, input validation Math.pow(base, exponent) Use: Exponentiation Case: Compound interest, animation curves Advanced String Magic str.includes() Use: Substring detection Case: Search features, content filtering str.split() Use: String → Array conversion Case: CSV parsing, text processing str.trim() Use: Remove whitespace Case: Form input sanitization str.substring(start, end) Use: Extract substring between indices Case: Truncating text, parsing IDs str.charAt(i...